Re: [PATCH v2 2/2] media: i2c: Add support for alvium camera

From: Tommaso Merciai
Date: Wed May 31 2023 - 10:20:49 EST

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Hi Laurent,

On Wed, May 31, 2023 at 02:33:31PM +0300, Laurent Pinchart wrote:
> Hi Tommaso,
>
> On Wed, May 31, 2023 at 12:13:39PM +0200, Tommaso Merciai wrote:
> > On Mon, May 29, 2023 at 10:40:18AM +0300, Laurent Pinchart wrote:
> > > On Fri, May 26, 2023 at 07:39:44PM +0200, Tommaso Merciai wrote:
> > > > The Alvium camera is shipped with sensor + isp in the same housing.
> > >
> > > What ISP is that ?
> >
> > The isp comes from Allied Vision, is called Alvium and is part of the camera.
> > In real is a vision processor, this offers more functionality then an isp can do.
> > It is not sold separately but is an integrated part of the camera itself
> > which also takes care of the sensor abstraction.
> >
> > >
> > > > The camera can be equipped with one out of various sensor and abstract
> > > > the user from this. Camera is connected via MIPI CSI-2.
> > > >
> > > > Most of the sensor's features are supported, with the main exception
> > > > being fw update.
> > >
> > > I assume you mean "camera module features" here, as firmware update
> > > isn't a camera sensor feature.
> >
> > Yep.
> >
> > > > The driver provides all mandatory, optional and recommended V4L2 controls
> > > > for maximum compatibility with libcamera
> > > >
> > > > References:
> > > > - https://www.alliedvision.com/en/products/embedded-vision-solutions
> > >
> > > I'll do a partial review only as the patch is large, and will try to
> > > review the rest in v2.
> >
> > No problem.
> >
> > > > Signed-off-by: Tommaso Merciai <tomm.merciai@xxxxxxxxx>
> > > > ---
> > > > drivers/media/i2c/Kconfig | 9 +
> > > > drivers/media/i2c/Makefile | 1 +
> > > > drivers/media/i2c/alvium.c | 3547 ++++++++++++++++++++++++++++++++++++
> > > > drivers/media/i2c/alvium.h | 500 +++++
> > > > 4 files changed, 4057 insertions(+)
> > > > create mode 100644 drivers/media/i2c/alvium.c
> > > > create mode 100644 drivers/media/i2c/alvium.h
> > > >
> > > > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> > > > index 256d55bb2b1d..ad55cfc530aa 100644
> > > > --- a/drivers/media/i2c/Kconfig
> > > > +++ b/drivers/media/i2c/Kconfig
> > > > @@ -34,6 +34,15 @@ config VIDEO_APTINA_PLL
> > > > config VIDEO_CCS_PLL
> > > > tristate
> > > >
> > > > +config VIDEO_ALVIUM
> > > > + tristate "Alliedvision ALVIUM camera support"
> > > > + depends on I2C
> > > > + select MEDIA_CONTROLLER
> > > > + select VIDEO_V4L2_SUBDEV_API
> > > > + select V4L2_FWNODE
> > > > + help
> > > > + This driver supports the Allied Vision's Camera.
> > > > +
> > > > config VIDEO_AR0521
> > > > tristate "ON Semiconductor AR0521 sensor support"
> > > > depends on I2C && VIDEO_DEV
> > > > diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> > > > index b44dacf935f4..14e19d48cf05 100644
> > > > --- a/drivers/media/i2c/Makefile
> > > > +++ b/drivers/media/i2c/Makefile
> > > > @@ -17,6 +17,7 @@ obj-$(CONFIG_VIDEO_ADV7604) += adv7604.o
> > > > obj-$(CONFIG_VIDEO_ADV7842) += adv7842.o
> > > > obj-$(CONFIG_VIDEO_AK7375) += ak7375.o
> > > > obj-$(CONFIG_VIDEO_AK881X) += ak881x.o
> > > > +obj-$(CONFIG_VIDEO_ALVIUM) += alvium.o
> > > > obj-$(CONFIG_VIDEO_APTINA_PLL) += aptina-pll.o
> > > > obj-$(CONFIG_VIDEO_AR0521) += ar0521.o
> > > > obj-$(CONFIG_VIDEO_BT819) += bt819.o
> > > > diff --git a/drivers/media/i2c/alvium.c b/drivers/media/i2c/alvium.c
> > > > new file mode 100644
> > > > index 000000000000..e77fb6bda64b
> > > > --- /dev/null
> > > > +++ b/drivers/media/i2c/alvium.c
> > > > @@ -0,0 +1,3547 @@
> > > > +// SPDX-License-Identifier: GPL-2.0+
> > > > +/*
> > > > + * Allied Vision Inc. Alvium camera driver
> > > > + *
> > > > + * Copyright (C) 2023 Tommaso Merciai
> > > > + * Copyright (C) 2023 Martin Hecht
> > > > + * Copyright (C) 2023 Avnet EMG GmbH
> > > > + */
> > > > +
> > > > +#include <asm/unaligned.h>
> > > > +#include <linux/clk.h>
> > > > +#include <linux/clk-provider.h>
> > > > +#include <linux/clkdev.h>
> > > > +#include <linux/ctype.h>
> > > > +#include <linux/delay.h>
> > > > +#include <linux/device.h>
> > > > +#include <linux/gpio/consumer.h>
> > > > +#include <linux/i2c.h>
> > > > +#include <linux/init.h>
> > > > +#include <linux/module.h>
> > > > +#include <linux/of_device.h>
> > > > +#include <linux/of_graph.h>
> > > > +#include <linux/pm_runtime.h>
> > > > +#include <linux/regulator/consumer.h>
> > > > +#include <linux/slab.h>
> > > > +#include <linux/types.h>
> > > > +#include <media/v4l2-async.h>
> > > > +#include <media/v4l2-ctrls.h>
> > > > +#include <media/mipi-csi2.h>
> > > > +#include <media/v4l2-device.h>
> > > > +#include <media/v4l2-event.h>
> > > > +#include <media/v4l2-fwnode.h>
> > > > +#include <media/v4l2-subdev.h>
> > > > +
> > > > +#include "alvium.h"
> > > > +
> > > > +static const struct v4l2_mbus_framefmt alvium_csi2_default_fmt = {
> > > > + .code = MEDIA_BUS_FMT_UYVY8_1X16,
> > > > + .width = 640,
> > > > + .height = 480,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SRGB),
> > > > + .quantization = V4L2_QUANTIZATION_FULL_RANGE,
> > > > + .xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SRGB),
> > > > + .field = V4L2_FIELD_NONE,
> > > > +};
> > > > +
> > > > +static const struct alvium_pixfmt alvium_csi2_fmts[] = {
> > > > + {
> > > > + /* UYVY8_2X8 */
> > > > + .id = ALVIUM_FMT_UYVY8_2X8,
> > > > + .code = MEDIA_BUS_FMT_UYVY8_2X8,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_YUV422_8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x1E,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* UYVY8_1X16 */
> > > > + .id = ALVIUM_FMT_UYVY8_1X16,
> > > > + .code = MEDIA_BUS_FMT_UYVY8_1X16,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_YUV422_8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x1E,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* YUYV8_1X16 */
> > > > + .id = ALVIUM_FMT_YUYV8_1X16,
> > > > + .code = MEDIA_BUS_FMT_YUYV8_1X16,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_YUV422_8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x1E,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* YUYV8_2X8 */
> > > > + .id = ALVIUM_FMT_YUYV8_2X8,
> > > > + .code = MEDIA_BUS_FMT_YUYV8_2X8,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_YUV422_8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x1E,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* YUYV10_1X20 */
> > > > + .id = ALVIUM_FMT_YUYV10_1X20,
> > > > + .code = MEDIA_BUS_FMT_YUYV10_1X20,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_YUV422_10,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x1F,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* RGB888_1X24 */
> > > > + .id = ALVIUM_FMT_RGB888_1X24,
> > > > + .code = MEDIA_BUS_FMT_RGB888_1X24,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_RGB888,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x24,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* RBG888_1X24 */
> > > > + .id = ALVIUM_FMT_RBG888_1X24,
> > > > + .code = MEDIA_BUS_FMT_RBG888_1X24,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_RGB888,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x24,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* BGR888_1X24 */
> > > > + .id = ALVIUM_FMT_BGR888_1X24,
> > > > + .code = MEDIA_BUS_FMT_BGR888_1X24,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_RGB888,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x24,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* RGB888_3X8 */
> > > > + .id = ALVIUM_FMT_RGB888_3X8,
> > > > + .code = MEDIA_BUS_FMT_RGB888_3X8,
> > > > + .colorspace = V4L2_COLORSPACE_SRGB,
> > > > + .fmt_av_bit = ALVIUM_BIT_RGB888,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_NONE,
> > > > + .mipi_fmt_regval = 0x24,
> > > > + .bay_fmt_regval = -1,
> > > > + .is_raw = 0,
> > > > + }, {
> > > > + /* Y8_1X8 */
> > > > + .id = ALVIUM_FMT_Y8_1X8,
> > > > + .code = MEDIA_BUS_FMT_Y8_1X8,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_MONO,
> > > > + .mipi_fmt_regval = 0x2A,
> > > > + .bay_fmt_regval = 0x00,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGRBG8_1X8 */
> > > > + .id = ALVIUM_FMT_SGRBG8_1X8,
> > > > + .code = MEDIA_BUS_FMT_SGRBG8_1X8,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GR,
> > > > + .mipi_fmt_regval = 0x2A,
> > > > + .bay_fmt_regval = 0x01,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SRGGB8_1X8 */
> > > > + .id = ALVIUM_FMT_SRGGB8_1X8,
> > > > + .code = MEDIA_BUS_FMT_SRGGB8_1X8,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_RG,
> > > > + .mipi_fmt_regval = 0x2A,
> > > > + .bay_fmt_regval = 0x02,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGBRG8_1X8 */
> > > > + .id = ALVIUM_FMT_SGBRG8_1X8,
> > > > + .code = MEDIA_BUS_FMT_SGBRG8_1X8,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GB,
> > > > + .mipi_fmt_regval = 0x2A,
> > > > + .bay_fmt_regval = 0x03,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SBGGR8_1X8 */
> > > > + .id = ALVIUM_FMT_SBGGR8_1X8,
> > > > + .code = MEDIA_BUS_FMT_SBGGR8_1X8,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW8,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_BG,
> > > > + .mipi_fmt_regval = 0x2A,
> > > > + .bay_fmt_regval = 0x04,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* Y10_1X10 */
> > > > + .id = ALVIUM_FMT_Y10_1X10,
> > > > + .code = MEDIA_BUS_FMT_Y10_1X10,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW10,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_MONO,
> > > > + .mipi_fmt_regval = 0x2B,
> > > > + .bay_fmt_regval = 0x00,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGRBG10_1X10 */
> > > > + .id = ALVIUM_FMT_SGRBG10_1X10,
> > > > + .code = MEDIA_BUS_FMT_SGRBG10_1X10,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW10,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GR,
> > > > + .mipi_fmt_regval = 0x2B,
> > > > + .bay_fmt_regval = 0x01,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SRGGB10_1X10 */
> > > > + .id = ALVIUM_FMT_SRGGB10_1X10,
> > > > + .code = MEDIA_BUS_FMT_SRGGB10_1X10,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW10,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_RG,
> > > > + .mipi_fmt_regval = 0x2B,
> > > > + .bay_fmt_regval = 0x02,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGBRG10_1X10 */
> > > > + .id = ALVIUM_FMT_SGBRG10_1X10,
> > > > + .code = MEDIA_BUS_FMT_SGBRG10_1X10,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW10,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GB,
> > > > + .mipi_fmt_regval = 0x2B,
> > > > + .bay_fmt_regval = 0x03,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SBGGR10_1X10 */
> > > > + .id = ALVIUM_FMT_SBGGR10_1X10,
> > > > + .code = MEDIA_BUS_FMT_SBGGR10_1X10,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW10,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_BG,
> > > > + .mipi_fmt_regval = 0x2B,
> > > > + .bay_fmt_regval = 0x04,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* Y12_1X12 */
> > > > + .id = ALVIUM_FMT_Y12_1X12,
> > > > + .code = MEDIA_BUS_FMT_Y12_1X12,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW12,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_MONO,
> > > > + .mipi_fmt_regval = 0x2C,
> > > > + .bay_fmt_regval = 0x00,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGRBG12_1X12 */
> > > > + .id = ALVIUM_FMT_SGRBG12_1X12,
> > > > + .code = MEDIA_BUS_FMT_SGRBG12_1X12,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW12,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GR,
> > > > + .mipi_fmt_regval = 0x2C,
> > > > + .bay_fmt_regval = 0x01,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SRGGB12_1X12 */
> > > > + .id = ALVIUM_FMT_SRGGB12_1X12,
> > > > + .code = MEDIA_BUS_FMT_SRGGB12_1X12,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW12,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_RG,
> > > > + .mipi_fmt_regval = 0x2C,
> > > > + .bay_fmt_regval = 0x02,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGBRG12_1X12 */
> > > > + .id = ALVIUM_FMT_SGBRG12_1X12,
> > > > + .code = MEDIA_BUS_FMT_SGBRG12_1X12,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW12,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GB,
> > > > + .mipi_fmt_regval = 0x2C,
> > > > + .bay_fmt_regval = 0x03,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SBGGR12_1X12 */
> > > > + .id = ALVIUM_FMT_SBGGR12_1X12,
> > > > + .code = MEDIA_BUS_FMT_SBGGR12_1X12,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW12,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_BG,
> > > > + .mipi_fmt_regval = 0x2C,
> > > > + .bay_fmt_regval = 0x04,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SBGGR14_1X14 */
> > > > + .id = ALVIUM_FMT_SBGGR14_1X14,
> > > > + .code = MEDIA_BUS_FMT_SBGGR14_1X14,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW14,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GR,
> > > > + .mipi_fmt_regval = 0x2D,
> > > > + .bay_fmt_regval = 0x01,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGBRG14_1X14 */
> > > > + .id = ALVIUM_FMT_SGBRG14_1X14,
> > > > + .code = MEDIA_BUS_FMT_SGBRG14_1X14,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW14,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_RG,
> > > > + .mipi_fmt_regval = 0x2D,
> > > > + .bay_fmt_regval = 0x02,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SRGGB14_1X14 */
> > > > + .id = ALVIUM_FMT_SRGGB14_1X14,
> > > > + .code = MEDIA_BUS_FMT_SRGGB14_1X14,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW14,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_GB,
> > > > + .mipi_fmt_regval = 0x2D,
> > > > + .bay_fmt_regval = 0x03,
> > > > + .is_raw = 1,
> > > > + }, {
> > > > + /* SGRBG14_1X14 */
> > > > + .id = ALVIUM_FMT_SGRBG14_1X14,
> > > > + .code = MEDIA_BUS_FMT_SGRBG14_1X14,
> > > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > > + .fmt_av_bit = ALVIUM_BIT_RAW14,
> > > > + .bay_av_bit = ALVIUM_BIT_BAY_BG,
> > > > + .mipi_fmt_regval = 0x2D,
> > > > + .bay_fmt_regval = 0x04,
> > > > + .is_raw = 1,
> > > > + },
> > > > + { /* sentinel */ }
> > > > +};
> > > > +
> > > > +static int alvium_i2c_read_reg(struct alvium_dev *alvium,
> > > > + u16 reg, u32 len, u64 *val)
> > > > +{
> > > > + struct i2c_client *client = alvium->i2c_client;
> > > > + struct i2c_msg msgs[2] = {0};
> > > > + u8 addr_buf[2] = {0};
> > > > + u8 data_buf[8] = {0};
> > > > + int ret;
> > > > +
> > > > + if (WARN_ON(len > 8))
> > > > + return -EINVAL;
> > > > +
> > > > + put_unaligned_be16(reg, addr_buf);
> > > > +
> > > > + msgs[0].addr = client->addr;
> > > > + msgs[0].flags = 0;
> > > > + msgs[0].len = ARRAY_SIZE(addr_buf);
> > > > + msgs[0].buf = addr_buf;
> > > > +
> > > > + msgs[1].addr = client->addr;
> > > > + msgs[1].flags = I2C_M_RD;
> > > > + msgs[1].len = len;
> > > > + msgs[1].buf = &data_buf[8 - len];
> > > > +
> > > > + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
> > > > + if (ret != ARRAY_SIZE(msgs))
> > > > + return -EIO;
> > > > +
> > > > + *val = get_unaligned_be64(data_buf);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_i2c_write_reg(struct alvium_dev *alvium,
> > > > + u16 reg, u32 len, u64 val)
> > > > +{
> > > > + struct i2c_client *client = alvium->i2c_client;
> > > > + u8 buf[10] = {0};
> > > > +
> > > > + if (WARN_ON(len > 8))
> > > > + return -EINVAL;
> > > > +
> > > > + put_unaligned_be16(reg, buf);
> > > > + put_unaligned_be64(val << (8 * (8 - len)), buf + 2);
> > > > + if (i2c_master_send(client, buf, len + 2) != len + 2)
> > > > + return -EIO;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_i2c_write_reg_hshake(struct alvium_dev *alvium,
> > > > + u16 reg, u32 len, u64 val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + u64 hshake_regval;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + /* reset handshake bit */
> > > > + ret = alvium_i2c_write_reg(alvium,
> > > > + alvium->bcrm_addr + REG_BCRM_WRITE_HANDSHAKE_8RW,
> > > > + 1, BCRM_HANDSHAKE_W_RST);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_i2c_write_reg(alvium, reg, len, val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + /* poll handshake bit since bit0 = 1*/
> > > > + do {
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr + REG_BCRM_WRITE_HANDSHAKE_8RW,
> > > > + 1, &hshake_regval);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->hshake_bit =
> > > > + (hshake_regval & BCRM_HANDSHAKE_W_DONE_EN_BIT);
> > > > +
> > > > + } while (!(alvium->hshake_bit));
> > > > +
> > > > + /* reset handshake bit, write 0 to bit0 */
> > > > + ret = alvium_i2c_write_reg(alvium,
> > > > + alvium->bcrm_addr + REG_BCRM_WRITE_HANDSHAKE_8RW,
> > > > + 1, BCRM_HANDSHAKE_W_RST);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + /* poll handshake bit since bit0 = 0 */
> > > > + do {
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr + REG_BCRM_WRITE_HANDSHAKE_8RW,
> > > > + 1, &hshake_regval);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->hshake_bit =
> > > > + (hshake_regval & BCRM_HANDSHAKE_W_DONE_EN_BIT);
> > > > +
> > > > + } while (alvium->hshake_bit);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_power_on(struct alvium_dev *alvium)
> > > > +{
> > > > + int ret;
> > > > +
> > > > + ret = clk_set_rate(alvium->xclk, alvium->xclk_freq);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + ret = clk_prepare_enable(alvium->xclk);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + gpiod_set_value(alvium->pwdn_gpio, 0);
> > > > + usleep_range(100, 200);
> > > > + gpiod_set_value(alvium->reset_gpio, 0);
> > > > + usleep_range(50, 100);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_power_off(struct alvium_dev *alvium)
> > > > +{
> > > > + gpiod_set_value(alvium->reset_gpio, 1);
> > > > + usleep_range(10, 50);
> > > > + gpiod_set_value(alvium->pwdn_gpio, 1);
> > > > + usleep_range(100, 200);
> > > > +
> > > > + clk_disable_unprepare(alvium->xclk);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_bcrm_vers(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > >
> > > "tmp" as a name is frowned upon as it's very non-descriptive. You can
> > > name it "val" or "value".
> > >
> > > > + alvium_bcrm_vers_t *v;
> > >
> > > And here, "ver" or "version" would be better.
> > >
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + REG_BCRM_VERSION_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read bcrm version reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + v = (alvium_bcrm_vers_t *) &tmp;
> > >
> > > This won't work on big-endian systems, you're relying on the fact that
> > > the fields are stored in tmp in a particular endianness. Same for
> > > alvium_get_fw_vers().
> > >
> > > > +
> > > > + alvium->bcrm_v.minor = v->minor;
> > > > + alvium->bcrm_v.major = v->major;
> > > > +
> > > > + dev_dbg(dev, "bcrm version: %u.%u\n", alvium->bcrm_v.minor,
> > > > + alvium->bcrm_v.major);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_fw_vers(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > + alvium_fw_vers_t *fw_v;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_DEVICE_FIRMWARE_VERSION_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read fw version reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + fw_v = (alvium_fw_vers_t *) &tmp;
> > > > +
> > > > + alvium->fw_v.special = fw_v->special;
> > > > + alvium->fw_v.major = fw_v->major;
> > > > + alvium->fw_v.minor = fw_v->major;
> > > > + alvium->fw_v.patch = fw_v->patch;
> > > > +
> > > > + dev_dbg(dev, "fw version: %u.%u.%u.%u\n",
> > > > + alvium->fw_v.special,
> > > > + alvium->fw_v.major,
> > > > + alvium->fw_v.minor,
> > > > + alvium->fw_v.patch);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_bcrm_addr(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + REG_BCRM_REG_ADDR_16R, 2, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read bcrm addr reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->bcrm_addr = (u16)tmp;
> > > > + dev_dbg(dev, "bcrm addr: %d\n", alvium->bcrm_addr);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +void alvium_print_avail_mipi_fmt(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > +
> > > > + dev_dbg(dev, "avail mipi_fmt yuv420_8_leg: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_8_LEG]);
> > > > + dev_dbg(dev, "avail mipi_fmt yuv420_8: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_8]);
> > > > + dev_dbg(dev, "avail mipi_fmt yuv420_10: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_10]);
> > > > + dev_dbg(dev, "avail mipi_fmt yuv420_8_csps: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_8_CSPS]);
> > > > + dev_dbg(dev, "avail mipi_fmt yuv420_10_csps: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_10_CSPS]);
> > > > + dev_dbg(dev, "avail mipi_fmt yuv422_8: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV422_8]);
> > > > + dev_dbg(dev, "avail mipi_fmt yuv422_10: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV422_10]);
> > > > + dev_dbg(dev, "avail mipi_fmt rgb888: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB888]);
> > > > + dev_dbg(dev, "avail mipi_fmt rgb666: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB666]);
> > > > + dev_dbg(dev, "avail mipi_fmt rgb565: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB565]);
> > > > + dev_dbg(dev, "avail mipi_fmt rgb555: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB555]);
> > > > + dev_dbg(dev, "avail mipi_fmt rgb444: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB444]);
> > > > + dev_dbg(dev, "avail mipi_fmt raw6: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW6]);
> > > > + dev_dbg(dev, "avail mipi_fmt raw7: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW7]);
> > > > + dev_dbg(dev, "avail mipi_fmt raw8: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW8]);
> > > > + dev_dbg(dev, "avail mipi_fmt raw10: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW10]);
> > > > + dev_dbg(dev, "avail mipi_fmt raw12: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW12]);
> > > > + dev_dbg(dev, "avail mipi_fmt raw14: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW14]);
> > > > + dev_dbg(dev, "avail mipi_fmt jpeg: %u\n",
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_JPEG]);
> > > > +}
> > > > +
> > > > +void alvium_print_avail_feat(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > +
> > > > + dev_dbg(dev, "feature rev_x: %u\n",
> > > > + alvium->avail_ft.rev_x);
> > > > + dev_dbg(dev, "feature rev_y: %u\n",
> > > > + alvium->avail_ft.rev_y);
> > > > + dev_dbg(dev, "feature int_autop: %u\n",
> > > > + alvium->avail_ft.int_autop);
> > > > + dev_dbg(dev, "feature black_lvl: %u\n",
> > > > + alvium->avail_ft.black_lvl);
> > > > + dev_dbg(dev, "feature gain: %u\n",
> > > > + alvium->avail_ft.gain);
> > > > + dev_dbg(dev, "feature gamma: %u\n",
> > > > + alvium->avail_ft.gamma);
> > > > + dev_dbg(dev, "feature contrast: %u\n",
> > > > + alvium->avail_ft.contrast);
> > > > + dev_dbg(dev, "feature sat: %u\n",
> > > > + alvium->avail_ft.sat);
> > > > + dev_dbg(dev, "feature hue: %u\n",
> > > > + alvium->avail_ft.hue);
> > > > + dev_dbg(dev, "feature whiteb: %u\n",
> > > > + alvium->avail_ft.whiteb);
> > > > + dev_dbg(dev, "feature sharp: %u\n",
> > > > + alvium->avail_ft.sharp);
> > > > + dev_dbg(dev, "feature auto_exp: %u\n",
> > > > + alvium->avail_ft.auto_exp);
> > > > + dev_dbg(dev, "feature auto_gain: %u\n",
> > > > + alvium->avail_ft.auto_gain);
> > > > + dev_dbg(dev, "feature auto_whiteb: %u\n",
> > > > + alvium->avail_ft.auto_whiteb);
> > > > + dev_dbg(dev, "feature dev_temp: %u\n",
> > > > + alvium->avail_ft.dev_temp);
> > > > + dev_dbg(dev, "feature acq_abort: %u\n",
> > > > + alvium->avail_ft.acq_abort);
> > > > + dev_dbg(dev, "feature acq_fr: %u\n",
> > > > + alvium->avail_ft.acq_fr);
> > > > + dev_dbg(dev, "feature fr_trigger: %u\n",
> > > > + alvium->avail_ft.fr_trigger);
> > > > + dev_dbg(dev, "feature exp_acq_line: %u\n",
> > > > + alvium->avail_ft.exp_acq_line);
> > > > +}
> > > > +
> > > > +void alvium_print_avail_bayer(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > +
> > > > + dev_dbg(dev, "avail bayer mono: %u\n",
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_MONO]);
> > > > + dev_dbg(dev, "avail bayer gr: %u\n",
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_GR]);
> > > > + dev_dbg(dev, "avail bayer rg: %u\n",
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_RG]);
> > > > + dev_dbg(dev, "avail bayer gb: %u\n",
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_GB]);
> > > > + dev_dbg(dev, "avail bayer bg: %u\n",
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_BG]);
> > > > +}
> > > > +
> > > > +static int alvium_get_feat_inq(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + alvium_avail_feat_t *f;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr + REG_BCRM_FEATURE_INQUIRY_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to features inquiry reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + f = (alvium_avail_feat_t *) &tmp;
> > > > +
> > > > + alvium->avail_ft.rev_x = f->rev_x;
> > > > + alvium->avail_ft.rev_y = f->rev_y;
> > > > + alvium->avail_ft.int_autop = f->int_autop;
> > > > + alvium->avail_ft.black_lvl = f->black_lvl;
> > > > + alvium->avail_ft.gain = f->gain;
> > > > + alvium->avail_ft.gamma = f->gamma;
> > > > + alvium->avail_ft.contrast = f->contrast;
> > > > + alvium->avail_ft.sat = f->sat;
> > > > + alvium->avail_ft.hue = f->rev_y;
> > > > + alvium->avail_ft.whiteb = f->whiteb;
> > > > + alvium->avail_ft.sharp = f->sharp;
> > > > + alvium->avail_ft.auto_exp = f->auto_exp;
> > > > + alvium->avail_ft.auto_gain = f->auto_gain;
> > > > + alvium->avail_ft.auto_whiteb = f->auto_whiteb;
> > > > + alvium->avail_ft.dev_temp = f->dev_temp;
> > > > + alvium->avail_ft.acq_abort = f->acq_abort;
> > > > + alvium->avail_ft.acq_fr = f->acq_fr;
> > > > + alvium->avail_ft.fr_trigger = f->fr_trigger;
> > > > + alvium->avail_ft.exp_acq_line = f->exp_acq_line;
> > > > +
> > > > + alvium_print_avail_feat(alvium);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_host_supp_csi_lanes(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr + REG_BCRM_CSI2_LANE_COUNT_8RW,
> > > > + 1, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->h_sup_csi_lanes = (u8)tmp;
> > > > + dev_dbg(dev, "host supported csi2 lanes count: %d\n",
> > > > + alvium->h_sup_csi_lanes);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_csi_lanes(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 num_lanes;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + num_lanes = alvium->ep.bus.mipi_csi2.num_data_lanes;
> > > > +
> > > > + if (num_lanes <= alvium->h_sup_csi_lanes) {
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CSI2_LANE_COUNT_8RW,
> > > > + 1, num_lanes);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set csi lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > + } else {
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "Set n lanes = %llu", num_lanes);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_streamon_delay(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 streamon_delay;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + /*
> > > > + * CSI2 receivers sometimes need some delay before are ready to
> > > > + * get data. This register set delay before camera start
> > > > + * capturing frames in us.
> > >
> > > If the CSI-2 receiver needs a delay, it should be handled by the CSI-2
> > > receiver driver, not here.
> >
> > My bad, bad description/bad name.
> >
> > This regs is an optional delay that alvium introduces between switching
> > from lp to hs mode.
> > Some mipi receivers require this delay on the sender side.
> >
> > I plan to switch to the following name: alliedvision,lp2hs-delay-us
> > and fix the comment with the above comment^
> >
> > This is more clear, what do you think about?
>
> It's a bit clearer, but still not fully :-) Does this delay correspond
> to one of the MIPI D-PHY timing parameters ? If so, which one ?

Thanks to Martin Hecht I'm able to provide you a clearer description:

Alvium normally delivers a continous clock even when it is not streaming.
The purpose of this reg is force a DPhy reset for the period described by
the us on the reg before it starts streaming. To be clear, with that value
bigger than 0 the Alvium forces a dphy-reset on all lanes for that period.
That means all lanes go up into low power state.
This may help a csi2 rx ip to reset if that IP can't deal with a continous clock.

>
> > > > + */
> > > > + streamon_delay = (u64)alvium->streamon_delay;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_STREAM_ON_DELAY_32RW,
> > > > + 4, streamon_delay);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set streamon delay reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_csi_clk_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CSI2_CLOCK_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_csi_clk = (u32)tmp;
> > > > + dev_dbg(dev, "Min host supported csi clock: %d\n",
> > > > + alvium->min_csi_clk);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CSI2_CLOCK_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_csi_clk = (u32)tmp;
> > > > + dev_dbg(dev, "Max host supported csi clock: %d\n",
> > > > + alvium->max_csi_clk);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_csi_clk(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 csi_clk;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CSI2_CLOCK_32RW,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "bcrm csi2 clock freq reg: %llu\n", tmp);
> > > > + csi_clk = alvium->ep.link_frequencies[0];
> > > > +
> > > > + if (csi_clk > alvium->min_csi_clk ||
> > > > + csi_clk < alvium->max_csi_clk) {
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CSI2_CLOCK_32RW,
> > > > + 4, csi_clk);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set csi lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > + } else {
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + alvium->link_freq = alvium->ep.link_frequencies[0];
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CSI2_CLOCK_32RW,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi2 lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "bcrm csi2 clock freq reg: %llu\n", tmp);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_img_width_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_WIDTH_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img min width reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->img_min_width = (u32)tmp;
> > > > + dev_dbg(dev, "Min img width: %d\n",
> > > > + alvium->img_min_width);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_WIDTH_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img max width reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->img_max_width = (u32)tmp;
> > > > + dev_dbg(dev, "Max img width: %d\n",
> > > > + alvium->img_max_width);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_WIDTH_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img inc width reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->img_inc_width = (u32)tmp;
> > > > + dev_dbg(dev, "img width increment: %d px\n",
> > > > + alvium->img_inc_width);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_img_height_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_HEIGHT_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img min height reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->img_min_height = (u32)tmp;
> > > > + dev_dbg(dev, "Min img height: %d\n",
> > > > + alvium->img_min_height);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_HEIGHT_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img max height reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->img_max_height = (u32)tmp;
> > > > + dev_dbg(dev, "Max img height: %d\n",
> > > > + alvium->img_max_height);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_HEIGHT_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img inc height reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->img_inc_height = (u32)tmp;
> > > > + dev_dbg(dev, "img height increment: %d\n",
> > > > + alvium->img_inc_height);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_img_width(struct alvium_dev *alvium, u32 width)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_WIDTH_32RW,
> > > > + 4, width);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set img width\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_img_height(struct alvium_dev *alvium, u32 height)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_HEIGHT_32RW,
> > > > + 4, height);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set img height\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_img_offx(struct alvium_dev *alvium, u32 offx)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_X_32RW,
> > > > + 4, offx);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set img offx\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_img_offy(struct alvium_dev *alvium, u32 offy)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_Y_32RW,
> > > > + 4, offy);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set img offy\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_offx_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_X_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min offx reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_offx = (u32)tmp;
> > > > + dev_dbg(dev, "Min img offx: %d\n",
> > > > + alvium->min_offx);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_X_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max offx reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_offx = (u32)tmp;
> > > > + dev_dbg(dev, "Max img offx: %d\n",
> > > > + alvium->max_offx);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_X_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc offx reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_offx = (u32)tmp;
> > > > + dev_dbg(dev, "Inc img offx: %d\n",
> > > > + alvium->inc_offx);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_offy_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_Y_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min offy reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_offy = (u32)tmp;
> > > > + dev_dbg(dev, "Min img offy: %d\n",
> > > > + alvium->min_offy);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_Y_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max offy reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_offy = (u32)tmp;
> > > > + dev_dbg(dev, "Max img offy: %d\n",
> > > > + alvium->max_offy);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_OFFSET_Y_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc offy reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_offy = (u32)tmp;
> > > > + dev_dbg(dev, "Inc img offy: %d\n",
> > > > + alvium->inc_offy);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_gain_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_MIN_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to min gain reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_gain = tmp;
> > > > + dev_dbg(dev, "Min gain: %llu mB\n",
> > > > + alvium->min_gain);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_MAX_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to max gain reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_gain = tmp;
> > > > + dev_dbg(dev, "Max gain: %llu mB\n",
> > > > + alvium->max_gain);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_INC_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to inc gain reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_gain = tmp;
> > > > + dev_dbg(dev, "gain inc: %llu mB\n",
> > > > + alvium->inc_gain);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_exposure_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_TIME_MIN_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img min exp reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_exp = tmp;
> > > > + dev_dbg(dev, "Min exp: %llu ns\n",
> > > > + alvium->min_exp);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_TIME_MAX_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img max exp reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_exp = tmp;
> > > > + dev_dbg(dev, "Max exp: %llu ns\n",
> > > > + alvium->max_exp);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_TIME_INC_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc exp reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_exp = tmp;
> > > > + dev_dbg(dev, "Inc exp: %llu ns\n",
> > > > + alvium->inc_exp);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_red_balance_ratio_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_RED_BALANCE_RATIO_MIN_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min rbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_rbalance = tmp;
> > > > + dev_dbg(dev, "Min rbalance: %llu\n",
> > > > + alvium->min_rbalance);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_RED_BALANCE_RATIO_MAX_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max rbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_rbalance = tmp;
> > > > + dev_dbg(dev, "Max rbalance: %llu\n",
> > > > + alvium->max_rbalance);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_RED_BALANCE_RATIO_INC_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc rbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_rbalance = tmp;
> > > > + dev_dbg(dev, "Inc rbalance: %llu\n",
> > > > + alvium->inc_rbalance);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_blue_balance_ratio_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLUE_BALANCE_RATIO_MIN_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min bbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_bbalance = tmp;
> > > > + dev_dbg(dev, "Min bbalance: %llu\n",
> > > > + alvium->min_bbalance);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLUE_BALANCE_RATIO_MAX_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max bbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_bbalance = tmp;
> > > > + dev_dbg(dev, "Max bbalance: %llu\n",
> > > > + alvium->max_bbalance);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLUE_BALANCE_RATIO_INC_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc bbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_bbalance = tmp;
> > > > + dev_dbg(dev, "Inc bbalance: %llu\n",
> > > > + alvium->inc_bbalance);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_hue_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_HUE_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min hue reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_hue = (s32)tmp;
> > > > + dev_dbg(dev, "Min hue: %d\n",
> > > > + alvium->min_hue);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_HUE_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max hue reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_hue = (s32)tmp;
> > > > + dev_dbg(dev, "Max hue: %d\n",
> > > > + alvium->max_hue);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_HUE_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc hue reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_hue = (s32)tmp;
> > > > + dev_dbg(dev, "Inc hue: %d\n",
> > > > + alvium->inc_hue);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_black_lvl_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLACK_LEVEL_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min black lvl reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_black_lvl = (s32)tmp;
> > > > + dev_dbg(dev, "Min black lvl: %d\n",
> > > > + alvium->min_hue);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLACK_LEVEL_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max black lvl reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_black_lvl = (s32)tmp;
> > > > + dev_dbg(dev, "Max black lvl: %d\n",
> > > > + alvium->max_black_lvl);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLACK_LEVEL_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc black lvl reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_black_lvl = (s32)tmp;
> > > > + dev_dbg(dev, "Inc black lvl: %d\n",
> > > > + alvium->inc_black_lvl);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_gamma_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAMMA_MIN_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min gamma reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_gamma = tmp;
> > > > + dev_dbg(dev, "Min gamma: %llu\n",
> > > > + alvium->min_gamma);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAMMA_MAX_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max bbalance reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_gamma = tmp;
> > > > + dev_dbg(dev, "Max gamma: %llu\n",
> > > > + alvium->max_gamma);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAMMA_INC_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc gamma reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_gamma = tmp;
> > > > + dev_dbg(dev, "Inc gamma: %llu\n",
> > > > + alvium->inc_gamma);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_sharpness_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SHARPNESS_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min sharpness lvl reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_sharp = (s32)tmp;
> > > > + dev_dbg(dev, "Min sharpness: %d\n",
> > > > + alvium->min_sharp);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLACK_LEVEL_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max sharpness reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_sharp = (s32)tmp;
> > > > + dev_dbg(dev, "Max sharpness: %d\n",
> > > > + alvium->max_sharp);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SHARPNESS_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc sharpness reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_sharp = (s32)tmp;
> > > > + dev_dbg(dev, "Inc sharpness: %d\n",
> > > > + alvium->inc_sharp);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_contrast_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CONTRAST_VALUE_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min contrast reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_contrast = (u32)tmp;
> > > > + dev_dbg(dev, "Min contrast: %d\n",
> > > > + alvium->min_contrast);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CONTRAST_VALUE_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max contrast reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_contrast = (u32)tmp;
> > > > + dev_dbg(dev, "Max contrast: %d\n",
> > > > + alvium->max_contrast);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CONTRAST_VALUE_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read inc contrast reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_contrast = (u32)tmp;
> > > > + dev_dbg(dev, "Inc contrast: %d\n",
> > > > + alvium->inc_contrast);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_saturation_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SATURATION_MIN_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min saturation reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_sat = (u32)tmp;
> > > > + dev_dbg(dev, "Min saturation: %d\n",
> > > > + alvium->min_sat);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SATURATION_MAX_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max saturation reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_sat = (u32)tmp;
> > > > + dev_dbg(dev, "Max saturation: %d\n",
> > > > + alvium->max_sat);
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SATURATION_INC_32R,
> > > > + 4, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max saturation reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->inc_sat = (u32)tmp;
> > > > + dev_dbg(dev, "Inc saturation: %d\n",
> > > > + alvium->inc_sat);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_bcm_mode(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + ret = alvium_i2c_write_reg(alvium,
> > > > + REG_GENCP_CHANGEMODE_8W,
> > > > + 1, ALVIUM_BCM_MODE);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to current mode reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->bcrm_mode = ALVIUM_BCM_MODE;
> > > > + dev_dbg(dev, "Set BCM mode");
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_mode(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 bcrm_mode;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + REG_GENCP_CURRENTMODE_8R,
> > > > + 1, &bcrm_mode);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read current mode reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + switch (bcrm_mode) {
> > > > + case ALVIUM_BCM_MODE:
> > > > + alvium->bcrm_mode = ALVIUM_BCM_MODE;
> > > > + break;
> > > > + case ALVIUM_GENCP_MODE:
> > > > + alvium->bcrm_mode = ALVIUM_GENCP_MODE;
> > > > + break;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "Current mode is: %d\n", alvium->bcrm_mode);
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_avail_mipi_data_format(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + alvium_avail_mipi_fmt_t *avail_fmt;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_AVAILABLE_MIPI_DATA_FORMATS_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "available mipi data format reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + avail_fmt = (alvium_avail_mipi_fmt_t *) &tmp;
> > > > +
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_8_LEG]
> > > > + = avail_fmt->yuv420_8_leg;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_8]
> > > > + = avail_fmt->yuv420_8;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_10]
> > > > + = avail_fmt->yuv420_10;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_8_CSPS]
> > > > + = avail_fmt->yuv420_8_csps;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV420_10_CSPS]
> > > > + = avail_fmt->yuv420_10_csps;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV422_8]
> > > > + = avail_fmt->yuv422_8;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_YUV422_10]
> > > > + = avail_fmt->yuv422_10;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB888]
> > > > + = avail_fmt->rgb888;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB666]
> > > > + = avail_fmt->rgb666;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB565]
> > > > + = avail_fmt->rgb565;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB555]
> > > > + = avail_fmt->rgb555;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RGB444]
> > > > + = avail_fmt->rgb444;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW6]
> > > > + = avail_fmt->raw6;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW7]
> > > > + = avail_fmt->raw7;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW8]
> > > > + = avail_fmt->raw8;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW10]
> > > > + = avail_fmt->raw10;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW12]
> > > > + = avail_fmt->raw12;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_RAW14]
> > > > + = avail_fmt->raw14;
> > > > + alvium->is_mipi_fmt_avail[ALVIUM_BIT_JPEG]
> > > > + = avail_fmt->jpeg;
> > > > +
> > > > + alvium_print_avail_mipi_fmt(alvium);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_setup_mipi_fmt(struct alvium_dev *alvium)
> > > > +{
> > > > + int sz = 0;
> > > > + int fmt = 0;
> > > > + int avail_fmt_cnt = 0;
> > > > +
> > > > + alvium->alvium_csi2_fmt = NULL;
> > > > +
> > > > + /* calculate fmt array size */
> > > > + for (fmt = 0; fmt < ALVIUM_NUM_SUPP_MIPI_DATA_FMT; fmt++) {
> > > > + if (alvium->is_mipi_fmt_avail[alvium_csi2_fmts[fmt].fmt_av_bit]) {
> > > > + if (!alvium_csi2_fmts[fmt].is_raw) {
> > > > + sz++;
> > > > + } else if (alvium_csi2_fmts[fmt].is_raw &&
> > > > + alvium->is_bay_avail[alvium_csi2_fmts[fmt].bay_av_bit]) {
> > > > + sz++;
> > > > + }
> > > > + }
> > > > + }
> > > > +
> > > > + /* init alvium_csi2_fmt array */
> > > > + alvium->alvium_csi2_fmt_n = sz;
> > > > + alvium->alvium_csi2_fmt = kmalloc((
> > > > + sizeof(struct alvium_pixfmt) * sz),
> > > > + GFP_KERNEL);
> > > > +
> > > > + /* Create the alvium_csi2 fmt array from formats available */
> > > > + for (fmt = 0; fmt < ALVIUM_NUM_SUPP_MIPI_DATA_FMT; fmt++) {
> > > > + if (alvium->is_mipi_fmt_avail[alvium_csi2_fmts[fmt].fmt_av_bit]) {
> > > > + if (!alvium_csi2_fmts[fmt].is_raw) {
> > > > + alvium->alvium_csi2_fmt[avail_fmt_cnt] =
> > > > + alvium_csi2_fmts[fmt];
> > > > + avail_fmt_cnt++;
> > > > + } else if (alvium_csi2_fmts[fmt].is_raw &&
> > > > + alvium->is_bay_avail[alvium_csi2_fmts[fmt].bay_av_bit]) {
> > > > + alvium->alvium_csi2_fmt[avail_fmt_cnt] =
> > > > + alvium_csi2_fmts[fmt];
> > > > + avail_fmt_cnt++;
> > > > + }
> > > > + }
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_mipi_fmt(struct alvium_dev *alvium,
> > > > + const struct alvium_pixfmt *pixfmt)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + u64 reg_val;
> > > > + int ret;
> > > > +
> > > > + reg_val = pixfmt->mipi_fmt_regval;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_MIPI_DATA_FORMAT_32RW,
> > > > + 4, reg_val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set mipi fmt\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_avail_bayer(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + alvium_avail_bayer_t *avail_bay;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_BAYER_PATTERN_INQUIRY_8R,
> > > > + 1, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read available Bayer patterns reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + avail_bay = (alvium_avail_bayer_t *) &tmp;
> > > > +
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_MONO] = avail_bay->mono;
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_GR] = avail_bay->gr;
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_RG] = avail_bay->rg;
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_GB] = avail_bay->gb;
> > > > + alvium->is_bay_avail[ALVIUM_BIT_BAY_BG] = avail_bay->bg;
> > > > +
> > > > + alvium_print_avail_bayer(alvium);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_bayer_pattern(struct alvium_dev *alvium,
> > > > + const struct alvium_pixfmt *pixfmt)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + u64 reg_val;
> > > > + int ret;
> > > > +
> > > > + reg_val = pixfmt->bay_fmt_regval;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_BAYER_PATTERN_8RW,
> > > > + 1, reg_val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set bayer pattern\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_frame_interval(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 tmp;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_ACQUISITION_FRAME_RATE_MIN_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min frame rate reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->min_fr = tmp;
> > > > +
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_ACQUISITION_FRAME_RATE_MAX_64R,
> > > > + 8, &tmp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read max frame rate reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + alvium->max_fr = tmp;
> > > > +
> > > > + dev_dbg(dev, "framerate min: %llu µHz, max: %llu µHz\n",
> > > > + alvium->min_fr, alvium->max_fr);
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_frame_rate(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 fr;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + fr = alvium->fr;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_ACQUISITION_FRAME_RATE_64RW,
> > > > + 8, fr);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set frame rate lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "set frame rate: %llu us\n", fr);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_stream_mipi(struct alvium_dev *alvium, bool on)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + switch (on) {
> > > > + case ALVIUM_STREAM_ON:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_ACQUISITION_START_8RW,
> > > > + 1, 0x01);
> > > > + break;
> > > > + case ALVIUM_STREAM_OFF:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_ACQUISITION_STOP_8RW,
> > > > + 1, 0x01);
> > > > + break;
> > > > + }
> > > > +
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail set_stream_mipi\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_gain(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 gain;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + if (!alvium->avail_ft.auto_gain)
> > > > + return -EINVAL;
> > > > +
> > > > + /* The unit is millibel (1 mB = 0.01 dB) */
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_64RW,
> > > > + 8, &gain);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read gain value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return gain;
> > > > +}
> > > > +
> > > > +static int alvium_set_gain(struct alvium_dev *alvium, int gain)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + if (!alvium->avail_ft.auto_gain)
> > > > + return -EINVAL;
> > > > +
> > > > + /* The unit is millibel (1 mB = 0.01 dB) */
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_64RW,
> > > > + 8, (u64)gain);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set gain value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_autogain(struct alvium_dev *alvium, bool on)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + if (!alvium->avail_ft.auto_gain)
> > > > + return -EINVAL;
> > > > +
> > > > + switch (on) {
> > > > + case ALVIUM_AUTOGAIN_ON:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_AUTO_8RW,
> > > > + 1, 0x02);
> > > > + break;
> > > > + case ALVIUM_AUTOGAIN_OFF:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAIN_AUTO_8RW,
> > > > + 1, 0x00);
> > > > + break;
> > > > + }
> > > > +
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set autogain reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_exposure(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > + u64 exp;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + if (!alvium->avail_ft.auto_exp)
> > > > + return -EINVAL;
> > > > +
> > > > + /* Exposure time in ns */
> > > > + ret = alvium_i2c_read_reg(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_TIME_64RW,
> > > > + 8, &exp);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read exposure value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return exp;
> > > > +}
> > > > +
> > > > +static int alvium_set_autoexposure(struct alvium_dev *alvium, bool on)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + if (!alvium->avail_ft.auto_exp)
> > > > + return -EINVAL;
> > > > +
> > > > + switch (on) {
> > > > + case ALVIUM_AUTOEXPOSURE_ON:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_AUTO_8RW,
> > > > + 1, 0x02);
> > > > + break;
> > > > + case ALVIUM_AUTOEXPOSURE_OFF:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_AUTO_8RW,
> > > > + 1, 0x00);
> > > > + break;
> > > > + }
> > > > +
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set autoexposure reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_exposure(struct alvium_dev *alvium, int exposure_ns)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_EXPOSURE_TIME_64RW,
> > > > + 8, (u64)exposure_ns);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set exposure value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_gain(struct alvium_dev *alvium, bool auto_gain)
> > > > +{
> > > > + struct alvium_ctrls *ctrls = &alvium->ctrls;
> > > > + int ret = 0;
> > > > +
> > > > + if (ctrls->auto_gain->is_new) {
> > > > + ret = alvium_set_autogain(alvium, auto_gain);
> > > > + if (ret)
> > > > + return ret;
> > > > + }
> > > > +
> > > > + if (!auto_gain && ctrls->gain->is_new) {
> > > > + u64 max_gain;
> > > > + u64 min_gain;
> > > > +
> > > > + ret = alvium_get_gain_params(alvium);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + max_gain = alvium->max_gain;
> > > > + min_gain = alvium->min_gain;
> > > > +
> > > > + if (ctrls->gain->val >= min_gain &&
> > > > + ctrls->gain->val <= max_gain) {
> > > > + ret = alvium_set_gain(alvium, ctrls->gain->val);
> > > > + } else {
> > > > + return -EINVAL;
> > > > + }
> > > > + }
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_set_blue_balance_ratio(struct alvium_dev *alvium,
> > > > + int blue)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_BLUE_BALANCE_RATIO_64RW,
> > > > + 8, (u64)blue);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set blue ratio value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_red_balance_ratio(struct alvium_dev *alvium,
> > > > + int red)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_RED_BALANCE_RATIO_64RW,
> > > > + 8, (u64)red);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set red ratio value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_awb(struct alvium_dev *alvium, bool on)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + if (!alvium->avail_ft.auto_whiteb)
> > > > + return -EINVAL;
> > > > +
> > > > + switch (on) {
> > > > + case ALVIUM_AWB_ON:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_WHITE_BALANCE_AUTO_8RW,
> > > > + 1, 0x02);
> > > > + break;
> > > > + case ALVIUM_AWB_OFF:
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_WHITE_BALANCE_AUTO_8RW,
> > > > + 1, 0x00);
> > > > + break;
> > > > + }
> > > > +
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set awb reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_exposure(struct alvium_dev *alvium,
> > > > + enum v4l2_exposure_auto_type auto_exposure)
> > > > +{
> > > > + struct alvium_ctrls *ctrls = &alvium->ctrls;
> > > > + bool auto_exp = (auto_exposure == V4L2_EXPOSURE_AUTO);
> > > > + int ret = 0;
> > > > +
> > > > + if (ctrls->auto_exp->is_new) {
> > > > + ret = alvium_set_autoexposure(alvium, auto_exp);
> > > > + if (ret)
> > > > + return ret;
> > > > + }
> > > > +
> > > > + if (!auto_exp && ctrls->exposure->is_new) {
> > > > + u64 max_exp;
> > > > + u64 min_exp;
> > > > +
> > > > + ret = alvium_get_exposure_params(alvium);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + max_exp = alvium->max_exp;
> > > > + min_exp = alvium->min_exp;
> > > > +
> > > > + if (ctrls->exposure->val >= min_exp &&
> > > > + ctrls->exposure->val <= max_exp) {
> > > > + ret = alvium_set_exposure(alvium, ctrls->exposure->val);
> > > > + if (ret)
> > > > + return ret;
> > > > + } else {
> > > > + return -EINVAL;
> > > > + }
> > > > + }
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_white_balance(struct alvium_dev *alvium,
> > > > + bool awb)
> > > > +{
> > > > + struct alvium_ctrls *ctrls = &alvium->ctrls;
> > > > + int ret = 0;
> > > > +
> > > > + if (ctrls->auto_wb->is_new) {
> > > > + ret = alvium_set_awb(alvium, awb);
> > > > + if (ret)
> > > > + return ret;
> > > > + }
> > > > +
> > > > + if (!awb && ctrls->auto_wb->is_new) {
> > > > + u64 red = (u64)ctrls->red_balance->val;
> > > > + u64 blue = (u64)ctrls->blue_balance->val;
> > > > + u64 red_max;
> > > > + u64 red_min;
> > > > + u64 blue_max;
> > > > + u64 blue_min;
> > > > +
> > > > + ret = alvium_get_red_balance_ratio_params(alvium);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + ret = alvium_get_blue_balance_ratio_params(alvium);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + red_max = alvium->max_rbalance;
> > > > + red_min = alvium->min_rbalance;
> > > > + blue_max = alvium->max_bbalance;
> > > > + blue_min = alvium->min_rbalance;
> > > > +
> > > > + ret = alvium_set_red_balance_ratio(alvium, red);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + ret = alvium_set_blue_balance_ratio(alvium, blue);
> > > > + if (ret)
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_hue(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_HUE_32RW,
> > > > + 4, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set hue value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_contrast(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_CONTRAST_VALUE_32RW,
> > > > + 4, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set contrast value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_saturation(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SATURATION_32RW,
> > > > + 4, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set contrast value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_gamma(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_GAMMA_64RW,
> > > > + 8, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set gamma value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_sharpness(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_SHARPNESS_32RW,
> > > > + 4, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set sharpness value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_hflip(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_REVERSE_X_8RW,
> > > > + 1, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set reverse_x value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_ctrl_vflip(struct alvium_dev *alvium, int val)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + if (!alvium->bcrm_addr)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_i2c_write_reg_hshake(alvium,
> > > > + alvium->bcrm_addr +
> > > > + REG_BCRM_IMG_REVERSE_Y_8RW,
> > > > + 1, (u64)val);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set reverse_y value reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_hw_features_params(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + ret = alvium_get_csi_clk_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min/max csi clock regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_img_width_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img width regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_img_height_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read img heigth regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_offx_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read offx regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_offy_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read offy regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_gain_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read gain regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_exposure_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read min/max exp regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_red_balance_ratio_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read red balance ratio regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_blue_balance_ratio_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read blue balance ratio regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_hue_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read hue regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_contrast_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read contrast regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_saturation_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read saturation regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_black_lvl_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read black lvl regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_gamma_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read gamma regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_sharpness_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read sharpness regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_hw_info(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + mutex_lock(&alvium->lock);
> > > > +
> > > > + ret = alvium_get_bcrm_vers(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read bcrm version reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_bcrm_addr(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to bcrm address reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_fw_vers(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read fw version reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_host_supp_csi_lanes(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read host supported csi lanes reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_feat_inq(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read bcrm feature inquiry reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_hw_features_params(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read features params regs\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_avail_mipi_data_format(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read available mipi data formats reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_avail_bayer(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to read available Bayer patterns reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_get_mode(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to get current mode reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + mutex_unlock(&alvium->lock);
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_hw_init(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + int ret;
> > > > +
> > > > + mutex_lock(&alvium->lock);
> > > > +
> > > > + /* Set Alvium BCM mode*/
> > > > + ret = alvium_set_bcm_mode(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set BCM mode\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_set_csi_lanes(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set csi lanes\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_set_csi_clk(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set csi lanes\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = alvium_set_streamon_delay(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to set streamon reg\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + mutex_unlock(&alvium->lock);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +/* --------------- Subdev Operations --------------- */
> > > > +
> > > > +static struct v4l2_rect *
> > > > +__alvium_get_pad_crop(struct alvium_dev *alvium,
> > > > + struct v4l2_subdev_state *state,
> > > > + unsigned int pad, enum v4l2_subdev_format_whence which)
> > > > +{
> > > > + switch (which) {
> > > > + case V4L2_SUBDEV_FORMAT_TRY:
> > > > + return v4l2_subdev_get_try_crop(&alvium->sd, state, pad);
> > > > + case V4L2_SUBDEV_FORMAT_ACTIVE:
> > > > + return &alvium->mode.crop;
> > > > + }
> > > > +
> > > > + return NULL;
> > > > +}
> > > > +
> > > > +static struct v4l2_mbus_framefmt *
> > > > +__alvium_get_pad_format(struct alvium_dev *alvium,
> > > > + struct v4l2_subdev_state *state,
> > > > + unsigned int pad, enum v4l2_subdev_format_whence which)
> > > > +{
> > > > + switch (which) {
> > > > + case V4L2_SUBDEV_FORMAT_TRY:
> > > > + return v4l2_subdev_get_try_format(&alvium->sd, state, pad);
> > > > + case V4L2_SUBDEV_FORMAT_ACTIVE:
> > > > + return &alvium->mode.fmt;
> > > > + default:
> > > > + return NULL;
> > > > + }
> > > > +}
> > > > +
> > > > +static int alvium_g_frame_interval(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_frame_interval *fi)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > +
> > > > + mutex_lock(&alvium->lock);
> > > > + fi->interval = alvium->frame_interval;
> > > > + mutex_unlock(&alvium->lock);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_frame_interval(struct alvium_dev *alvium,
> > > > + struct v4l2_subdev_frame_interval *fi)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + u64 req_fr, min_fr, max_fr;
> > > > + int ret;
> > > > +
> > > > + if (fi->interval.denominator == 0)
> > > > + return -EINVAL;
> > > > +
> > > > + ret = alvium_get_frame_interval(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Fail to get frame interval\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + min_fr = alvium->min_fr;
> > > > + max_fr = alvium->max_fr;
> > > > +
> > > > + dev_dbg(dev, "fi->interval.numerator = %d\n",
> > > > + fi->interval.numerator);
> > > > + dev_dbg(dev, "fi->interval.denominator = %d\n",
> > > > + fi->interval.denominator);
> > > > +
> > > > + req_fr = (fi->interval.denominator * ALVIUM_HZ_TO_UHZ) /
> > > > + fi->interval.numerator;
> > > > +
> > > > + if (req_fr >= alvium->max_fr &&
> > > > + req_fr <= alvium->min_fr)
> > > > + return -EINVAL;
> > > > +
> > > > + alvium->fr = req_fr;
> > > > + alvium->frame_interval.numerator = fi->interval.numerator;
> > > > + alvium->frame_interval.denominator = fi->interval.denominator;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_s_frame_interval(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_frame_interval *fi)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + int ret;
> > > > +
> > > > + if (fi->pad != 0)
> > > > + return -EINVAL;
> > > > +
> > > > + if (alvium->streaming)
> > > > + return -EBUSY;
> > > > +
> > > > + mutex_lock(&alvium->lock);
> > > > +
> > > > + ret = alvium_set_frame_interval(alvium, fi);
> > > > + if (!ret) {
> > > > + ret = alvium_set_frame_rate(alvium);
> > > > + if (ret)
> > > > + return -EIO;
> > > > + }
> > > > +
> > > > + mutex_unlock(&alvium->lock);
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_enum_mbus_code(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_state *sd_state,
> > > > + struct v4l2_subdev_mbus_code_enum *code)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + const struct alvium_pixfmt *formats;
> > > > + unsigned int num_formats;
> > > > +
> > > > + if (alvium_is_csi2(alvium)) {
> > > > + formats = alvium->alvium_csi2_fmt;
> > > > + num_formats = alvium->alvium_csi2_fmt_n;
> > > > + }
> > > > +
> > > > + if (code->index >= num_formats)
> > >
> > > num_formats is uninitialized if alvium_is_csi2() is false. This can't
> > > happen as the driver supports CSI-2 only, so drop the alvium_is_csi2()
> > > check here.
> >
> > Agree, thanks.
> >
> > > > + return -EINVAL;
> > > > +
> > > > + code->code = formats[code->index].code;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static const struct alvium_pixfmt *
> > > > +alvium_code_to_pixfmt(struct alvium_dev *alvium, u32 code)
> > > > +{
> > > > + const struct alvium_pixfmt *formats = alvium->alvium_csi2_fmt;
> > > > + unsigned int i;
> > > > +
> > > > + for (i = 0; formats[i].code; ++i) {
> > > > + if (formats[i].code == code)
> > > > + return &formats[i];
> > > > + }
> > > > +
> > > > + return &formats[0];
> > > > +}
> > > > +
> > > > +static int alvium_set_mode(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + struct alvium_mode *current_mode = &alvium->mode;
> > > > + int ret;
> > > > +
> > > > + if (current_mode->width < alvium->img_max_width &&
> > > > + current_mode->width > alvium->img_min_width) {
> > > > + ret = alvium_set_img_width(alvium, current_mode->width);
> > > > + if (ret)
> > > > + return ret;
> > > > + } else {
> > > > + dev_err(dev, "Unsupported width");
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + if (current_mode->height < alvium->img_max_height &&
> > > > + current_mode->height > alvium->img_min_height) {
> > > > + ret = alvium_set_img_height(alvium, current_mode->height);
> > > > + if (ret)
> > > > + return ret;
> > > > + } else {
> > > > + dev_err(dev, "Unsupported height");
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + ret = alvium_set_img_offx(alvium, current_mode->crop.left);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + ret = alvium_set_img_offy(alvium, current_mode->crop.top);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_framefmt(struct alvium_dev *alvium,
> > > > + struct v4l2_mbus_framefmt *format)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + const struct alvium_pixfmt *alvium_csi2_fmt;
> > > > + int ret = 0;
> > > > +
> > > > + alvium_csi2_fmt = alvium_code_to_pixfmt(alvium, format->code);
> > > > +
> > > > + ret = alvium_set_mipi_fmt(alvium, alvium_csi2_fmt);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + if (alvium_csi2_fmt->is_raw) {
> > > > + ret = alvium_set_bayer_pattern(alvium, alvium_csi2_fmt);
> > > > + if (ret)
> > > > + return ret;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "start: %s, mipi_fmt_regval regval = 0x%llx",
> > > > + __func__, alvium_csi2_fmt->mipi_fmt_regval);
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_s_stream(struct v4l2_subdev *sd, int enable)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + int ret = 0;
> > > > +
> > > > + if (enable) {
> > > > + mutex_lock(&alvium->lock);
> > > > + ret = __v4l2_ctrl_handler_setup(&alvium->ctrls.handler);
> > > > + if (ret)
> > > > + goto out;
> > > > +
> > > > + ret = alvium_set_mode(alvium);
> > > > + if (ret)
> > > > + goto out;
> > > > +
> > > > + ret = alvium_set_framefmt(alvium, &alvium->mode.fmt);
> > > > + if (ret)
> > > > + goto out;
> > > > +
> > > > + if (alvium_is_csi2(alvium))
> > > > + ret = alvium_set_stream_mipi(alvium, enable);
> > > > + mutex_unlock(&alvium->lock);
> > > > + } else {
> > > > + mutex_lock(&alvium->lock);
> > > > + ret = alvium_set_stream_mipi(alvium, enable);
> > > > + if (ret)
> > > > + goto out;
> > > > +
> > > > + mutex_unlock(&alvium->lock);
> > > > + }
> > > > +
> > > > + alvium->streaming = !!enable;
> > > > + return 0;
> > > > +
> > > > +out:
> > > > + mutex_unlock(&alvium->lock);
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_init_cfg(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_state *state)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + struct v4l2_mbus_framefmt *fmt =
> > > > + v4l2_subdev_get_try_format(sd, state, 0);
> > > > + struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, state, 0);
> > > > + struct alvium_mode *current_mode = &alvium->mode;
> > > > +
> > > > + *fmt = alvium_csi2_default_fmt;
> > > > +
> > > > + crop->left = current_mode->crop.left;
> > > > + crop->top = current_mode->crop.top;
> > > > + crop->width = current_mode->crop.width;
> > > > + crop->height = current_mode->crop.height;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_fmt(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_state *sd_state,
> > > > + struct v4l2_subdev_format *format)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + struct alvium_mode *current_mode = &alvium->mode;
> > > > + const struct alvium_pixfmt *alvium_csi2_fmt;
> > > > + struct v4l2_mbus_framefmt *fmt;
> > > > + const struct v4l2_rect *crop;
> > > > +
> > > > + crop = __alvium_get_pad_crop(alvium, sd_state, format->pad, format->which);
> > > > + fmt = __alvium_get_pad_format(alvium, sd_state, format->pad, format->which);
> > > > +
> > > > + if (format->format.width <= alvium->img_max_width &&
> > > > + format->format.width >= alvium->img_min_width) {
> > > > + current_mode->width = format->format.width;
> > > > + } else {
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + if (format->format.height <= alvium->img_max_height &&
> > > > + format->format.height >= alvium->img_min_height) {
> > > > + current_mode->height = format->format.height;
> > > > + } else {
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + alvium_csi2_fmt = alvium_code_to_pixfmt(alvium, format->format.code);
> > > > +
> > > > + fmt->code = alvium_csi2_fmt->code;
> > > > + fmt->width = current_mode->width;
> > > > + fmt->height = current_mode->height;
> > > > +
> > > > + /* Set also the crop width and height when set a new fmt */
> > > > + current_mode->crop.width = current_mode->width;
> > > > + current_mode->crop.height = current_mode->height;
> > > > +
> > > > + format->format = *fmt;
> > > > +
> > > > + if (format->which == V4L2_SUBDEV_FORMAT_TRY)
> > > > + return 0;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_fmt(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_state *sd_state,
> > > > + struct v4l2_subdev_format *format)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + struct alvium_mode *current_mode = &alvium->mode;
> > > > +
> > > > + format->format = current_mode->fmt;
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_set_selection(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_state *sd_state,
> > > > + struct v4l2_subdev_selection *sel)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + struct alvium_mode *current_mode = &alvium->mode;
> > > > + struct v4l2_rect *__crop;
> > > > +
> > > > + /*
> > > > + * Alvium can only shift the origin of the img
> > > > + * then we accept only value with the same value of the actual fmt
> > > > + */
> > > > + if (sel->r.width != current_mode->width ||
> > > > + sel->r.height != current_mode->height)
> > > > + return -EINVAL;
> > > > +
> > > > + if (sel->target != V4L2_SEL_TGT_CROP)
> > > > + return -EINVAL;
> > > > +
> > > > + if ((sel->r.left + sel->r.width) <= alvium->img_max_width)
> > > > + current_mode->crop.left = sel->r.left;
> > > > + else
> > > > + return -EINVAL;
> > > > +
> > > > + if ((sel->r.top + sel->r.height) <= alvium->img_max_height)
> > > > + current_mode->crop.top = sel->r.top;
> > > > + else
> > > > + return -EINVAL;
> > > > +
> > > > + current_mode->crop.width = sel->r.width;
> > > > + current_mode->crop.height = sel->r.height;
> > > > +
> > > > + __crop = __alvium_get_pad_crop(alvium, sd_state, sel->pad, sel->which);
> > > > +
> > > > + *__crop = current_mode->crop;
> > > > + sel->r = current_mode->crop;
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_get_selection(struct v4l2_subdev *sd,
> > > > + struct v4l2_subdev_state *sd_state,
> > > > + struct v4l2_subdev_selection *sel)
> > > > +{
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > +
> > > > + switch (sel->target) {
> > > > + /* Current cropping area */
> > > > + case V4L2_SEL_TGT_CROP:
> > > > + mutex_lock(&alvium->lock);
> > > > + sel->r = *__alvium_get_pad_crop(alvium, sd_state, sel->pad,
> > > > + sel->which);
> > > > + mutex_unlock(&alvium->lock);
> > > > + break;
> > > > + /* Cropping bounds */
> > > > + case V4L2_SEL_TGT_NATIVE_SIZE:
> > > > + sel->r.top = 0;
> > > > + sel->r.left = 0;
> > > > + sel->r.width = alvium->img_max_width;
> > > > + sel->r.height = alvium->img_max_height;
> > > > + break;
> > > > + /* Default cropping area */
> > > > + case V4L2_SEL_TGT_CROP_BOUNDS:
> > > > + case V4L2_SEL_TGT_CROP_DEFAULT:
> > > > + sel->r.top = alvium->min_offy;
> > > > + sel->r.left = alvium->min_offx;
> > > > + sel->r.width = alvium->img_max_width;
> > > > + sel->r.height = alvium->img_max_height;
> > > > + break;
> > > > + default:
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
> > > > +{
> > > > + struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + int val;
> > > > +
> > > > + switch (ctrl->id) {
> > > > + case V4L2_CID_AUTOGAIN:
> > > > + val = alvium_get_gain(alvium);
> > > > + if (val < 0)
> > > > + return val;
> > > > + alvium->ctrls.gain->val = val;
> > > > + break;
> > > > + case V4L2_CID_EXPOSURE_AUTO:
> > > > + val = alvium_get_exposure(alvium);
> > > > + if (val < 0)
> > > > + return val;
> > > > + alvium->ctrls.exposure->val = val;
> > > > + break;
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_s_ctrl(struct v4l2_ctrl *ctrl)
> > > > +{
> > > > + struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
> > > > + struct alvium_dev *alvium = sd_to_alvium(sd);
> > > > + int ret;
> > > > +
> > > > + switch (ctrl->id) {
> > > > + case V4L2_CID_AUTOGAIN:
> > > > + ret = alvium_set_ctrl_gain(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_EXPOSURE_AUTO:
> > > > + ret = alvium_set_ctrl_exposure(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_AUTO_WHITE_BALANCE:
> > > > + ret = alvium_set_ctrl_white_balance(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_HUE:
> > > > + ret = alvium_set_ctrl_hue(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_CONTRAST:
> > > > + ret = alvium_set_ctrl_contrast(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_SATURATION:
> > > > + ret = alvium_set_ctrl_saturation(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_GAMMA:
> > > > + ret = alvium_set_ctrl_gamma(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_SHARPNESS:
> > > > + ret = alvium_set_ctrl_sharpness(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_HFLIP:
> > > > + ret = alvium_set_ctrl_hflip(alvium, ctrl->val);
> > > > + break;
> > > > + case V4L2_CID_VFLIP:
> > > > + ret = alvium_set_ctrl_vflip(alvium, ctrl->val);
> > > > + break;
> > > > + default:
> > > > + ret = -EINVAL;
> > > > + break;
> > > > + }
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static const struct v4l2_ctrl_ops alvium_ctrl_ops = {
> > > > + .g_volatile_ctrl = alvium_g_volatile_ctrl,
> > > > + .s_ctrl = alvium_s_ctrl,
> > > > +};
> > > > +
> > > > +static int alvium_init_controls(struct alvium_dev *alvium)
> > > > +{
> > > > + const struct v4l2_ctrl_ops *ops = &alvium_ctrl_ops;
> > > > + struct alvium_ctrls *ctrls = &alvium->ctrls;
> > > > + struct v4l2_ctrl_handler *hdl = &ctrls->handler;
> > > > + struct v4l2_fwnode_device_properties props;
> > > > + int ret;
> > > > +
> > > > + v4l2_ctrl_handler_init(hdl, 32);
> > > > +
> > > > + /* we can use our own mutex for the ctrl lock */
> > > > + hdl->lock = &alvium->lock;
> > > > +
> > > > + /* Pixel rate is fixed */
> > > > + ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_PIXEL_RATE, 0,
> > > > + ALVIUM_DEFAULT_PIXEL_RATE_MHZ, 1,
> > > > + ALVIUM_DEFAULT_PIXEL_RATE_MHZ);
> > > > +
> > > > + /* Link freq is fixed */
> > > > + ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, ops,
> > > > + V4L2_CID_LINK_FREQ,
> > > > + 0, 0, &alvium->link_freq);
> > > > +
> > > > + /* Auto/manual white balance */
> > > > + if (alvium->avail_ft.auto_whiteb)
> > > > + ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_AUTO_WHITE_BALANCE,
> > > > + 0, 1, 1, 1);
> > > > +
> > > > + ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_BLUE_BALANCE,
> > > > + alvium->min_bbalance,
> > > > + alvium->max_bbalance,
> > > > + alvium->inc_bbalance,
> > > > + alvium->min_bbalance);
> > > > + ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_RED_BALANCE,
> > > > + alvium->min_rbalance,
> > > > + alvium->max_rbalance,
> > > > + alvium->inc_rbalance,
> > > > + alvium->min_rbalance);
> > > > +
> > > > + /* Auto/manual exposure */
> > > > + if (alvium->avail_ft.auto_exp)
> > > > + ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
> > > > + V4L2_CID_EXPOSURE_AUTO,
> > > > + V4L2_EXPOSURE_MANUAL, 0,
> > > > + V4L2_EXPOSURE_AUTO);
> > > > +
> > > > + ctrls->exposure = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_EXPOSURE,
> > > > + alvium->min_exp,
> > > > + alvium->max_exp,
> > > > + alvium->inc_exp,
> > > > + alvium->min_exp);
> > > > +
> > > > + /* Auto/manual gain */
> > > > + if (alvium->avail_ft.auto_gain)
> > > > + ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_AUTOGAIN,
> > > > + 0, 1, 1, 1);
> > > > +
> > > > + if (alvium->avail_ft.gain)
> > > > + ctrls->gain = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_GAIN,
> > > > + alvium->min_gain,
> > > > + alvium->max_gain,
> > > > + alvium->inc_gain,
> > > > + alvium->min_gain);
> > > > +
> > > > + if (alvium->avail_ft.sat)
> > > > + ctrls->saturation = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_SATURATION,
> > > > + alvium->min_sat,
> > > > + alvium->max_sat,
> > > > + alvium->inc_sat,
> > > > + alvium->max_sat);
> > > > +
> > > > + if (alvium->avail_ft.hue)
> > > > + ctrls->hue = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_HUE,
> > > > + alvium->min_hue,
> > > > + alvium->max_hue,
> > > > + alvium->inc_hue,
> > > > + alvium->min_hue);
> > > > +
> > > > + if (alvium->avail_ft.contrast)
> > > > + ctrls->contrast = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_CONTRAST,
> > > > + alvium->min_contrast,
> > > > + alvium->max_contrast,
> > > > + alvium->inc_contrast,
> > > > + alvium->min_contrast);
> > > > +
> > > > + if (alvium->avail_ft.gamma)
> > > > + ctrls->contrast = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_GAMMA,
> > > > + alvium->min_gamma,
> > > > + alvium->max_gamma,
> > > > + alvium->inc_gamma,
> > > > + alvium->min_gamma);
> > > > +
> > > > + if (alvium->avail_ft.sharp)
> > > > + ctrls->contrast = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_SHARPNESS,
> > > > + alvium->min_sharp,
> > > > + alvium->max_sharp,
> > > > + alvium->inc_sharp,
> > > > + alvium->min_sharp);
> > > > +
> > > > + if (alvium->avail_ft.rev_x)
> > > > + ctrls->hflip = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_HFLIP,
> > > > + 0, 1, 1, 0);
> > > > +
> > > > + if (alvium->avail_ft.rev_y)
> > > > + ctrls->vflip = v4l2_ctrl_new_std(hdl, ops,
> > > > + V4L2_CID_VFLIP,
> > > > + 0, 1, 1, 0);
> > > > +
> > > > + if (hdl->error) {
> > > > + ret = hdl->error;
> > > > + goto free_ctrls;
> > > > + }
> > > > +
> > > > + ret = v4l2_fwnode_device_parse(&alvium->i2c_client->dev, &props);
> > > > + if (ret)
> > > > + goto free_ctrls;
> > > > +
> > > > + if (props.rotation == 180)
> > > > + alvium->upside_down = true;
> > > > +
> > > > + ret = v4l2_ctrl_new_fwnode_properties(hdl, ops, &props);
> > > > + if (ret)
> > > > + goto free_ctrls;
> > > > +
> > > > + ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > > > + ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > > > + ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
> > > > + ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
> > > > +
> > > > + v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
> > > > + v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
> > > > + v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
> > > > +
> > > > + alvium->sd.ctrl_handler = hdl;
> > > > + return 0;
> > > > +
> > > > +free_ctrls:
> > > > + v4l2_ctrl_handler_free(hdl);
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int alvium_link_setup(struct media_entity *entity,
> > > > + const struct media_pad *local,
> > > > + const struct media_pad *remote, u32 flags)
> > > > +{
> > > > + /*
> > > > + * Return no error:
> > > > + * For some drivers this media entity operation
> > > > + * is mandatory.
> > >
> > > This shouldn't be mandatory, no. You can drop it.
> >
> > I add thi and alvium_s_power to be compliant on some vendors bsp.
> > But you are completely right I will drop this on v3.
> >
> > > > + * TODO: add this media entity operation implementation
> > > > + */
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_s_power(struct v4l2_subdev *sd, int on)
> > > > +{
> > > > + /*
> > > > + * Return no error:
> > > > + * For some drivers this subdev ops is mandatory.
> > > > + * TODO: add this subdev_core_ops implementation
> > > > + */
> > >
> > > .s_power() is deprecated, you can drop it.
> > >
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static const struct v4l2_subdev_core_ops alvium_core_ops = {
> > > > + .s_power = alvium_s_power,
> > > > + .log_status = v4l2_ctrl_subdev_log_status,
> > > > + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> > > > + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> > > > +};
> > > > +
> > > > +static const struct v4l2_subdev_video_ops alvium_video_ops = {
> > > > + .g_frame_interval = alvium_g_frame_interval,
> > > > + .s_frame_interval = alvium_s_frame_interval,
> > > > + .s_stream = alvium_s_stream,
> > > > +};
> > > > +
> > > > +static const struct v4l2_subdev_pad_ops alvium_pad_ops = {
> > > > + .init_cfg = alvium_init_cfg,
> > > > + .enum_mbus_code = alvium_enum_mbus_code,
> > > > + .get_fmt = alvium_get_fmt,
> > > > + .set_fmt = alvium_set_fmt,
> > > > + .get_selection = alvium_get_selection,
> > > > + .set_selection = alvium_set_selection,
> > > > +};
> > > > +
> > > > +static const struct v4l2_subdev_ops alvium_subdev_ops = {
> > > > + .core = &alvium_core_ops,
> > > > + .pad = &alvium_pad_ops,
> > > > + .video = &alvium_video_ops,
> > > > +};
> > > > +
> > > > +static const struct media_entity_operations alvium_sd_media_ops = {
> > > > + .link_setup = alvium_link_setup,
> > > > +};
> > > > +
> > > > +static int alvium_get_dt_data(struct alvium_dev *alvium)
> > > > +{
> > > > + struct device *dev = &alvium->i2c_client->dev;
> > > > + struct device_node *node = dev->of_node;
> > > > + struct fwnode_handle *endpoint;
> > > > + int ret = 0;
> > > > +
> > > > + if (!node)
> > > > + return -EINVAL;
> > > > +
> > > > + /* get system clock (xclk) */
> > > > + alvium->xclk = devm_clk_get(dev, "xclk");
> > > > + if (IS_ERR(alvium->xclk)) {
> > > > + dev_err(dev, "failed to get xclk\n");
> > > > + return PTR_ERR(alvium->xclk);
> > > > + }
> > > > +
> > > > + alvium->xclk_freq = clk_get_rate(alvium->xclk);
> > > > + if (alvium->xclk_freq)
> > > > + dev_err(dev, "xclk frequency: %d Hz\n",
> > > > + alvium->xclk_freq);
> > > > +
> > > > + /* request optional power down pin */
> > > > + alvium->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
> > > > + GPIOD_OUT_HIGH);
> > > > + if (IS_ERR(alvium->pwdn_gpio))
> > > > + return PTR_ERR(alvium->pwdn_gpio);
> > > > +
> > > > + /* request optional reset pin */
> > > > + alvium->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> > > > + GPIOD_OUT_HIGH);
> > > > + if (IS_ERR(alvium->reset_gpio))
> > > > + return PTR_ERR(alvium->reset_gpio);
> > > > +
> > > > + ret = fwnode_property_read_u32(dev_fwnode(dev), "streamon-delay",
> > > > + &alvium->streamon_delay);
> > > > + if (ret)
> > > > + dev_info(dev, "streamon-delay not found\n");
> > > > +
> > > > + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> > > > + if (!endpoint) {
> > > > + dev_err(dev, "endpoint node not found\n");
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &alvium->ep)) {
> > > > + dev_err(dev, "could not parse endpoint\n");
> > > > + return 0;
> > > > + }
> > > > +
> > > > + if (alvium->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
> > > > + dev_err(dev, "unsupported bus type\n");
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + if (!alvium->ep.nr_of_link_frequencies) {
> > > > + dev_err(dev, "no link frequencies defined");
> > > > + return -EINVAL;
> > > > + }
> > > > +
> > > > + dev_dbg(dev, "number of link frequencies rate: %d\n",
> > > > + alvium->ep.nr_of_link_frequencies);
> > > > + dev_dbg(dev, "link frequencies rate: %llu\n",
> > > > + alvium->ep.link_frequencies[0]);
> > > > + dev_dbg(dev, "csi data lanes number: %d\n",
> > > > + alvium->ep.bus.mipi_csi2.num_data_lanes);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int alvium_probe(struct i2c_client *client)
> > > > +{
> > > > + struct device *dev = &client->dev;
> > > > + struct v4l2_subdev *sd;
> > > > + struct alvium_dev *alvium;
> > > > + int ret;
> > > > +
> > > > + alvium = devm_kzalloc(dev, sizeof(*alvium), GFP_KERNEL);
> > > > + if (!alvium)
> > > > + return -ENOMEM;
> > > > +
> > > > + alvium->i2c_client = client;
> > > > + ret = alvium_get_dt_data(alvium);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + mutex_init(&alvium->lock);
> > > > +
> > > > + sd = &alvium->sd;
> > > > +
> > > > + /* init alvium sd */
> > > > + v4l2_i2c_subdev_init(sd, client, &alvium_subdev_ops);
> > > > +
> > > > + sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
> > > > + alvium->pad.flags = MEDIA_PAD_FL_SOURCE;
> > > > + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
> > > > + sd->entity.ops = &alvium_sd_media_ops;
> > > > +
> > > > + ret = media_entity_pads_init(&sd->entity, 1, &alvium->pad);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + sd->dev = dev;
> > > > +
> > > > + ret = alvium_power_on(alvium);
> > >
> > > The driver should use runtime PM (with autosuspend), and power on/off in
> > > the .s_stream() handler.
> >
> > Can we delay the pm implementation as a future patchset?
> > Alvium pm would be tricky (cause is the boot time of the camera)
> > and if is possible I want work on pm later.
> > Let me know. Thanks! :)
>
> With autosuspend the camera can remain powered up between stream stop
> and stream start, if they happen quickly enough. An autosuspend delay of
> a few seconds is usually a good value. It should be fairly easy to
> implement runtime PM support, you just need to
>
> - Call alvium_power_on() from the runtime PM resume handler and
> alvium_power_off() from the runtime PM suspend handler.
>
> - Call pm_runtime_resume_and_get() and stream on time, and
> pm_runtime_mark_last_busy() and pm_runtime_put_autosuspend() at stream
> stop time.
>
> - Initialize runtime PM at probe time (and clean up at remove time).
> There's a bit of boilerplate code needed to get that right, but it's
> not difficult. You can copy it from the imx290 driver.

Thanks for suggestion! :)
I will take a look on this.

>
> > > > + if (ret)
> > > > + goto entity_cleanup;
> > > > +
> > > > + ret = alvium_get_hw_info(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "Device detection failed: %d\n", ret);
> > > > + goto err_poweroff;
> > > > + }
> > > > +
> > > > + ret = alvium_hw_init(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "hw_init fail %d\n", ret);
> > > > + goto entity_cleanup;
> > > > + }
> > > > +
> > > > + ret = alvium_setup_mipi_fmt(alvium);
> > > > + if (ret) {
> > > > + dev_err(dev, "hw_init fail %d\n", ret);
> > > > + goto entity_cleanup;
> > > > + }
> > > > +
> > > > + /* Setup initial frame interval*/
> > > > + alvium->frame_interval.numerator = 1;
> > > > + alvium->frame_interval.denominator = ALVIUM_DEFAULT_FR_HZ;
> > > > + alvium->fr = ALVIUM_DEFAULT_FR_HZ;
> > > > +
> > > > + /* Setup the initial mode */
> > > > + alvium->mode.fmt = alvium_csi2_default_fmt;
> > > > + alvium->mode.width = alvium_csi2_default_fmt.width;
> > > > + alvium->mode.height = alvium_csi2_default_fmt.height;
> > > > + alvium->mode.crop.left = alvium->min_offx;
> > > > + alvium->mode.crop.top = alvium->min_offy;
> > > > + alvium->mode.crop.width = alvium_csi2_default_fmt.width;
> > > > + alvium->mode.crop.height = alvium_csi2_default_fmt.height;
> > > > +
> > > > + ret = alvium_init_controls(alvium);
> > > > + if (ret)
> > > > + goto entity_cleanup;
> > > > +
> > > > + ret = v4l2_async_register_subdev_sensor(sd);
> > > > + if (ret) {
> > > > + dev_err(dev,
> > > > + "failed to register async subdev: %d", ret);
> > > > + goto entity_cleanup;
> > > > + }
> > > > +
> > > > + v4l2_info(sd, "%s: completed successfully\n", __func__);
> > > > + return 0;
> > > > +
> > > > +err_poweroff:
> > > > + alvium_power_off(alvium);
> > > > +entity_cleanup:
> > > > + media_entity_cleanup(&sd->entity);
> > > > + mutex_destroy(&alvium->lock);
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static void alvium_remove(struct i2c_client *client)
> > > > +{
> > > > + struct alvium_dev *dev = i2c_to_alvium(client);
> > > > +
> > > > + i2c_unregister_device(dev->i2c_client);
> > > > +}
> > > > +
> > > > +static const struct i2c_device_id alvium_id[] = {
> > > > + {"alvium", 0},
> > > > + {},
> > > > +};
> > > > +MODULE_DEVICE_TABLE(i2c, alvium_id);
> > > > +
> > > > +static const struct of_device_id alvium_of_ids[] = {
> > > > + { .compatible = "alliedvision,alvium", },
> > > > + { }
> > > > +};
> > > > +MODULE_DEVICE_TABLE(of, alvium_of_ids);
> > > > +
> > > > +static struct i2c_driver alvium_i2c_driver = {
> > > > + .driver = {
> > > > + .name = "alvium",
> > > > + .of_match_table = alvium_of_ids,
> > > > + },
> > > > + .id_table = alvium_id,
> > > > + .probe_new = alvium_probe,
> > > > + .remove = alvium_remove,
> > > > +};
> > > > +
> > > > +module_i2c_driver(alvium_i2c_driver);
> > > > +
> > > > +MODULE_DESCRIPTION("Allied Vision's Alvium Camera Driver");
> > > > +MODULE_AUTHOR("Tommaso Merciai <tomm.merciai@xxxxxxxxx>");
> > > > +MODULE_AUTHOR("Martin Hecht <martin.hecht@xxxxxxxx>");
> > > > +MODULE_AUTHOR("Avnet Silica Software & Services EMEA");
> > > > +MODULE_LICENSE("GPL v2");
> > > > diff --git a/drivers/media/i2c/alvium.h b/drivers/media/i2c/alvium.h
> > > > new file mode 100644
> > > > index 000000000000..c363bbd822dd
> > > > --- /dev/null
> > > > +++ b/drivers/media/i2c/alvium.h
> > > > @@ -0,0 +1,500 @@
> > > > +/* SPDX-License-Identifier: GPL-2.0-only */
> > > > +/*
> > > > + * Allied Vision Inc. Alvium camera driver
> > > > + *
> > > > + * Copyright (C) 2023 Tommaso Merciai
> > > > + * Copyright (C) 2023 Martin Hecht
> > > > + * Copyright (C) 2023 Avnet EMG GmbH
> > > > + */
> > > > +
> > > > +#ifndef ALVIUM_H_
> > > > +#define ALVIUM_H_
> > > > +
> > > > +#include <linux/clk.h>
> > > > +#include <linux/gpio/consumer.h>
> > > > +#include <linux/kernel.h>
> > > > +#include <linux/regulator/consumer.h>
> > > > +#include <media/v4l2-common.h>
> > > > +#include <media/v4l2-ctrls.h>
> > > > +#include <media/v4l2-fwnode.h>
> > > > +#include <media/v4l2-subdev.h>
> > > > +
> > > > +#define ALVIUM_HZ_TO_UHZ 1000000UL
> > >
> > > I think the number of µs in a second is the same everywhere, it's not
> > > specific to this driver :-) Use USEC_PER_SEC from the standard headers.
> >
> > Right! Thanks!
> >
> > > > +
> > > > +#define ALVIUM_STREAM_ON true
> > > > +#define ALVIUM_STREAM_OFF false
> > > > +#define ALVIUM_AUTOGAIN_ON true
> > > > +#define ALVIUM_AUTOGAIN_OFF false
> > > > +#define ALVIUM_AUTOEXPOSURE_ON true
> > > > +#define ALVIUM_AUTOEXPOSURE_OFF false
> > > > +#define ALVIUM_AWB_ON true
> > > > +#define ALVIUM_AWB_OFF false
> > >
> > > That's just confusing, drop the macros and use boolean values directly
> > > in the code.
> >
> > Oks, I'll fix this in v3.
> >
> > > > +
> > > > +/* BCRM register offsets */
> > >
> > > What does BCRM stand for ?
> >
> > /* Basic Control Register Map register offsets (BCRM) */
>
> That's better, thanks :-)
>
> > > > +#define REG_BCRM_VERSION_32R 0x0000
> > >
> > > Instead of encoding the register size in the macro name, I'd recommend
> > > encoding it in the macro value. See the imx290.c driver for an example.
> > > You will then be able to drop the len argument to alvium_i2c_read_reg()
> > > and alvium_i2c_write_reg().
> > >
> > > It would also be good to not have to always pass a u64 value to those
> > > functions, when reading or writing smaller registers. I think this could
> > > be done with a bit of macro magic for read access. The
> > > alvium_i2c_read_reg() function could be turned into a macro that checks
> > > if the value pointer has the right size with a static assertion to cause
> > > a compilation failure if it doesn't.
> >
> > You are completely right. But problem is that most of those regs
> > depending on the base address (bcrm_addr) that is not static could be
> > variable. Instead imx290 have fixed address.
> >
> > e.g.
> >
> > alvium_i2c_write_reg_hshake(alvium,
> > alvium->bcrm_addr + REG_BCRM_CSI2_LANE_COUNT_8RW,
> > 1, num_lanes);
> >
> > What do you think about this?
>
> Please see below.
>
> > I do some test using the following implementation:
> > https://pastebin.com/pZ6aBtaT
> > but problem is bcrm_addr.
> >
> > >
> > > > +#define REG_BCRM_FEATURE_INQUIRY_64R 0x0008
> > > > +#define REG_BCRM_DEVICE_FIRMWARE_VERSION_64R 0x0010
> > > > +#define REG_BCRM_REG_ADDR_16R 0x0014
> > > > +#define REG_BCRM_WRITE_HANDSHAKE_8RW 0x0018
> > >
> > > You're mixing the CCI and V4L2 registers here. VERSION_32R and
> > > REG_ADDR_16R are CCI registers, while DEVICE_FIRMWARE_VERSION_64R,
> > > FEATURE_INQUIRY_64R and WRITE_HANDSHAKE_8RW are V4L2 registers. Please
> > > split them in different sections.
> >
> > Oks, thanks.
> >
> > > I also recommend encoding whether a register is a CCI or a V4L2 register
> > > in the register value, along with the register size, and let the
> > > read/write functions add the V4L2 register offset automatically. This
> > > will greatly simplify the callers.
> >
> > Can you give more details about this, please?
>
> Something along those lines (completely untested).
>
> #define REG_BCRM_V4L2 BIT(31)
> #define REG_BCRM_SIZE_SHIFT 16
> #define REG_BCRM_SIZE_MASK 0x000f0000
> #define REG_BCRM_SIZE(reg) (((reg) & REG_BCRM_SIZE_MASK) >> REG_BCRM_SIZE_SHIFT)
> #define REG_BCRM_ADDR_MASK 0x0000ffff
> #define REG_BCRM_ADDR(reg) ((reg) & REG_BCRM_ADDR_MASK)
>
> #define REG_BCRM_CCI_8BIT(n) ((1U << IMX290_REG_SIZE_SHIFT) | (n))
> #define REG_BCRM_CCI_16BIT(n) ((2U << IMX290_REG_SIZE_SHIFT) | (n))
> #define REG_BCRM_CCI_32BIT(n) ((4U << IMX290_REG_SIZE_SHIFT) | (n))
> #define REG_BCRM_CCI_64BIT(n) ((8U << IMX290_REG_SIZE_SHIFT) | (n))
>
> #define REG_BCRM_V4L2_8BIT(n) (REG_BCRM_V4L2 | (1U << IMX290_REG_SIZE_SHIFT) | (n))
> #define REG_BCRM_V4L2_16BIT(n) (REG_BCRM_V4L2 | (2U << IMX290_REG_SIZE_SHIFT) | (n))
> #define REG_BCRM_V4L2_32BIT(n) (REG_BCRM_V4L2 | (4U << IMX290_REG_SIZE_SHIFT) | (n))
> #define REG_BCRM_V4L2_64BIT(n) (REG_BCRM_V4L2 | (8U << IMX290_REG_SIZE_SHIFT) | (n))
>
> #define REG_BCRM_VERSION REG_BCRM_CCI_32BIT(0x0000)
> #define REG_BCRM_REG_ADDR REG_BCRM_CCI_16BIT(0x0014)
>
> #define REG_BCRM_FEATURE_INQUIRY REG_BCRM_V4L2_64BIT(0x0008)
> #define REG_BCRM_DEVICE_FIRMWARE_VERSION REG_BCRM_V4L2_64BIT(0x0010)
> #define REG_BCRM_WRITE_HANDSHAKE REG_BCRM_V4L2_8BIT(0x0018)
>
> static int __alvium_i2c_write_reg(struct alvium_dev *alvium, u32 reg, u8 *val)
> {
> struct i2c_client *client = alvium->i2c_client;
> unsigned int size = REG_BCRM_SIZE(reg);
> u16 addr = REG_BCRM_ADDR(reg);
> ...
>
> if (reg & REG_BCRM_V4L2)
> addr += alvium->bcrm_addr;
>
> ...
> }
>
> #define alvium_i2c_write_reg(alvium, reg, val) \
> ({
> u32 __reg = reg;
> static_assert(REG_BCRM_SIZE(__reg) == sizeof(val));
> __alvium_i2c_write_reg(alvium, __reg, &val);
> })
>
> And similar for read.
>
> If you want to catch unintentional writes to read-only registers, you
> can also add two bits in the register address to encode that:
>
> #define REG_BCRM_READ BIT(30)
> #define REG_BCRM_WRITE BIT(29)
>
> and check them in the __alvium_i2c_read_reg() and
> __alvium_i2c_write_reg() functions.
>

Thanks for the explanation!
I will try this way.

> > > > +
> > > > +/* Streaming Control Registers */
> > > > +#define REG_BCRM_SUPPORTED_CSI2_LANE_COUNTS_8R 0x0040
> > > > +#define REG_BCRM_CSI2_LANE_COUNT_8RW 0x0044
> > > > +#define REG_BCRM_CSI2_CLOCK_MIN_32R 0x0048
> > > > +#define REG_BCRM_CSI2_CLOCK_MAX_32R 0x004C
> > >
> > > Lowercase for hex constants, please.
> > >
> > > > +#define REG_BCRM_CSI2_CLOCK_32RW 0x0050
> > > > +#define REG_BCRM_BUFFER_SIZE_32R 0x0054
> > > > +
> > > > +#define REG_BCRM_IPU_X_MIN_32W 0x0058
> > > > +#define REG_BCRM_IPU_X_MAX_32W 0x005C
> > > > +#define REG_BCRM_IPU_X_INC_32W 0x0060
> > > > +#define REG_BCRM_IPU_Y_MIN_32W 0x0064
> > > > +#define REG_BCRM_IPU_Y_MAX_32W 0x0068
> > > > +#define REG_BCRM_IPU_Y_INC_32W 0x006C
> > > > +#define REG_BCRM_IPU_X_32R 0x0070
> > > > +#define REG_BCRM_IPU_Y_32R 0x0074
> > > > +
> > > > +#define REG_BCRM_PHY_RESET_8RW 0x0078
> > > > +#define REG_BCRM_STREAM_ON_DELAY_32RW 0x007C
> > > > +
> > > > +/* Acquisition Control Registers */
> > > > +#define REG_BCRM_ACQUISITION_START_8RW 0x0080
> > > > +#define REG_BCRM_ACQUISITION_STOP_8RW 0x0084
> > > > +#define REG_BCRM_ACQUISITION_ABORT_8RW 0x0088
> > > > +#define REG_BCRM_ACQUISITION_STATUS_8R 0x008C
> > > > +#define REG_BCRM_ACQUISITION_FRAME_RATE_64RW 0x0090
> > > > +#define REG_BCRM_ACQUISITION_FRAME_RATE_MIN_64R 0x0098
> > > > +#define REG_BCRM_ACQUISITION_FRAME_RATE_MAX_64R 0x00A0
> > > > +#define REG_BCRM_ACQUISITION_FRAME_RATE_INC_64R 0x00A8
> > > > +#define REG_BCRM_ACQUISITION_FRAME_RATE_ENABLE_8RW 0x00B0
> > > > +
> > > > +#define REG_BCRM_FRAME_START_TRIGGER_MODE_8RW 0x00B4
> > > > +#define REG_BCRM_FRAME_START_TRIGGER_SOURCE_8RW 0x00B8
> > > > +#define REG_BCRM_FRAME_START_TRIGGER_ACTIVATION_8RW 0x00BC
> > > > +#define REG_BCRM_FRAME_START_TRIGGER_SOFTWARE_8W 0x00C0
> > > > +#define REG_BCRM_FRAME_START_TRIGGER_DELAY_32RW 0x00C4
> > > > +#define REG_BCRM_EXPOSURE_ACTIVE_LINE_MODE_8RW 0x00C8
> > > > +#define REG_BCRM_EXPOSURE_ACTIVE_LINE_SELECTOR_8RW 0x00CC
> > > > +#define REG_BCRM_LINE_CONFIGURATION_32RW 0x00D0
> > > > +
> > > > +#define REG_BCRM_IMG_WIDTH_32RW 0x0100
> > > > +#define REG_BCRM_IMG_WIDTH_MIN_32R 0x0104
> > > > +#define REG_BCRM_IMG_WIDTH_MAX_32R 0x0108
> > > > +#define REG_BCRM_IMG_WIDTH_INC_32R 0x010C
> > > > +
> > > > +#define REG_BCRM_IMG_HEIGHT_32RW 0x0110
> > > > +#define REG_BCRM_IMG_HEIGHT_MIN_32R 0x0114
> > > > +#define REG_BCRM_IMG_HEIGHT_MAX_32R 0x0118
> > > > +#define REG_BCRM_IMG_HEIGHT_INC_32R 0x011C
> > > > +
> > > > +#define REG_BCRM_IMG_OFFSET_X_32RW 0x0120
> > > > +#define REG_BCRM_IMG_OFFSET_X_MIN_32R 0x0124
> > > > +#define REG_BCRM_IMG_OFFSET_X_MAX_32R 0x0128
> > > > +#define REG_BCRM_IMG_OFFSET_X_INC_32R 0x012C
> > > > +
> > > > +#define REG_BCRM_IMG_OFFSET_Y_32RW 0x0130
> > > > +#define REG_BCRM_IMG_OFFSET_Y_MIN_32R 0x0134
> > > > +#define REG_BCRM_IMG_OFFSET_Y_MAX_32R 0x0138
> > > > +#define REG_BCRM_IMG_OFFSET_Y_INC_32R 0x013C
> > > > +
> > > > +#define REG_BCRM_IMG_MIPI_DATA_FORMAT_32RW 0x0140
> > > > +#define REG_BCRM_IMG_AVAILABLE_MIPI_DATA_FORMATS_64R 0x0148
> > > > +#define REG_BCRM_IMG_BAYER_PATTERN_INQUIRY_8R 0x0150
> > > > +#define REG_BCRM_IMG_BAYER_PATTERN_8RW 0x0154
> > > > +#define REG_BCRM_IMG_REVERSE_X_8RW 0x0158
> > > > +#define REG_BCRM_IMG_REVERSE_Y_8RW 0x015C
> > > > +
> > > > +#define REG_BCRM_SENSOR_WIDTH_32R 0x0160
> > > > +#define REG_BCRM_SENSOR_HEIGHT_32R 0x0164
> > > > +#define REG_BCRM_WIDTH_MAX_32R 0x0168
> > > > +#define REG_BCRM_HEIGHT_MAX_32R 0x016C
> > > > +
> > > > +#define REG_BCRM_EXPOSURE_TIME_64RW 0x0180
> > > > +#define REG_BCRM_EXPOSURE_TIME_MIN_64R 0x0188
> > > > +#define REG_BCRM_EXPOSURE_TIME_MAX_64R 0x0190
> > > > +#define REG_BCRM_EXPOSURE_TIME_INC_64R 0x0198
> > > > +#define REG_BCRM_EXPOSURE_AUTO_8RW 0x01A0
> > > > +
> > > > +#define REG_BCRM_INTENSITY_AUTO_PRECEDENCE_8RW 0x01A4
> > > > +#define REG_BCRM_INTENSITY_AUTO_PRECEDENCE_VALUE_32RW 0x01A8
> > > > +#define REG_BCRM_INTENSITY_AUTO_PRECEDENCE_MIN_32R 0x01AC
> > > > +#define REG_BCRM_INTENSITY_AUTO_PRECEDENCE_MAX_32R 0x01B0
> > > > +#define REG_BCRM_INTENSITY_AUTO_PRECEDENCE_INC_32R 0x01B4
> > > > +
> > > > +#define REG_BCRM_BLACK_LEVEL_32RW 0x01B8
> > > > +#define REG_BCRM_BLACK_LEVEL_MIN_32R 0x01BC
> > > > +#define REG_BCRM_BLACK_LEVEL_MAX_32R 0x01C0
> > > > +#define REG_BCRM_BLACK_LEVEL_INC_32R 0x01C4
> > > > +
> > > > +#define REG_BCRM_GAIN_64RW 0x01C8
> > > > +#define REG_BCRM_GAIN_MIN_64R 0x01D0
> > > > +#define REG_BCRM_GAIN_MAX_64R 0x01D8
> > > > +#define REG_BCRM_GAIN_INC_64R 0x01E0
> > > > +#define REG_BCRM_GAIN_AUTO_8RW 0x01E8
> > > > +
> > > > +#define REG_BCRM_GAMMA_64RW 0x01F0
> > > > +#define REG_BCRM_GAMMA_MIN_64R 0x01F8
> > > > +#define REG_BCRM_GAMMA_MAX_64R 0x0200
> > > > +#define REG_BCRM_GAMMA_INC_64R 0x0208
> > > > +
> > > > +#define REG_BCRM_CONTRAST_VALUE_32RW 0x0214
> > > > +#define REG_BCRM_CONTRAST_VALUE_MIN_32R 0x0218
> > > > +#define REG_BCRM_CONTRAST_VALUE_MAX_32R 0x021C
> > > > +#define REG_BCRM_CONTRAST_VALUE_INC_32R 0x0220
> > > > +
> > > > +#define REG_BCRM_SATURATION_32RW 0x0240
> > > > +#define REG_BCRM_SATURATION_MIN_32R 0x0244
> > > > +#define REG_BCRM_SATURATION_MAX_32R 0x0248
> > > > +#define REG_BCRM_SATURATION_INC_32R 0x024C
> > > > +
> > > > +#define REG_BCRM_HUE_32RW 0x0250
> > > > +#define REG_BCRM_HUE_MIN_32R 0x0254
> > > > +#define REG_BCRM_HUE_MAX_32R 0x0258
> > > > +#define REG_BCRM_HUE_INC_32R 0x025C
> > > > +
> > > > +#define REG_BCRM_ALL_BALANCE_RATIO_64RW 0x0260
> > > > +#define REG_BCRM_ALL_BALANCE_RATIO_MIN_64R 0x0268
> > > > +#define REG_BCRM_ALL_BALANCE_RATIO_MAX_64R 0x0270
> > > > +#define REG_BCRM_ALL_BALANCE_RATIO_INC_64R 0x0278
> > > > +
> > > > +#define REG_BCRM_RED_BALANCE_RATIO_64RW 0x0280
> > > > +#define REG_BCRM_RED_BALANCE_RATIO_MIN_64R 0x0288
> > > > +#define REG_BCRM_RED_BALANCE_RATIO_MAX_64R 0x0290
> > > > +#define REG_BCRM_RED_BALANCE_RATIO_INC_64R 0x0298
> > > > +
> > > > +#define REG_BCRM_GREEN_BALANCE_RATIO_64RW 0x02A0
> > > > +#define REG_BCRM_GREEN_BALANCE_RATIO_MIN_64R 0x02A8
> > > > +#define REG_BCRM_GREEN_BALANCE_RATIO_MAX_64R 0x02B0
> > > > +#define REG_BCRM_GREEN_BALANCE_RATIO_INC_64R 0x02B8
> > > > +
> > > > +#define REG_BCRM_BLUE_BALANCE_RATIO_64RW 0x02C0
> > > > +#define REG_BCRM_BLUE_BALANCE_RATIO_MIN_64R 0x02C8
> > > > +#define REG_BCRM_BLUE_BALANCE_RATIO_MAX_64R 0x02D0
> > > > +#define REG_BCRM_BLUE_BALANCE_RATIO_INC_64R 0x02D8
> > > > +
> > > > +#define REG_BCRM_WHITE_BALANCE_AUTO_8RW 0x02E0
> > > > +#define REG_BCRM_SHARPNESS_32RW 0x0300
> > > > +#define REG_BCRM_SHARPNESS_MIN_32R 0x0304
> > > > +#define REG_BCRM_SHARPNESS_MAX_32R 0x0308
> > > > +#define REG_BCRM_SHARPNESS_INC_32R 0x030C
> > > > +
> > > > +#define REG_BCRM_DEVICE_TEMPERATURE_32R 0x0310
> > > > +#define REG_BCRM_EXPOSURE_AUTO_MIN_64RW 0x0330
> > > > +#define REG_BCRM_EXPOSURE_AUTO_MAX_64RW 0x0338
> > > > +#define REG_BCRM_GAIN_AUTO_MIN_64RW 0x0340
> > > > +#define REG_BCRM_GAIN_AUTO_MAX_64RW 0x0348
> > > > +
> > > > +#define REG_BCRM_LAST_ADDR 0x0348
> > > > +
> > > > +/* GenCP Registers */
> > > > +#define REG_GENCP_CHANGEMODE_8W 0x021C
> > > > +#define REG_GENCP_CURRENTMODE_8R 0x021D
> > > > +
> > > > +#define REG_GENCP_OUT_HANDSHAKE_8RW 0x0018
> > > > +#define REG_GENCP_IN_HANDSHAKE_8RW 0x001c
> > > > +#define REG_GENCP_OUT_SIZE_16W 0x0020
> > > > +#define REG_GENCP_IN_SIZE_16R 0x0024
> > > > +
> > > > +#define REG_BCRM_HANDSHAKE_STATUS_MASK 0x01
> > > > +#define REG_BCRM_HANDSHAKE_AVAILABLE_MASK 0x80
> > > > +
> > > > +#define BCRM_HANDSHAKE_W_DONE_EN_BIT BIT(0)
> > > > +#define BCRM_HANDSHAKE_W_RST 0
> > > > +
> > > > +#define ALVIUM_DEFAULT_FR_HZ 10
> > > > +#define ALVIUM_DEFAULT_PIXEL_RATE_MHZ 148000000
> > > > +
> > > > +enum alvium_bcrm_mode {
> > > > + ALVIUM_BCM_MODE,
> > > > + ALVIUM_GENCP_MODE,
> > > > + ALVIUM_NUM_MODE
> > > > +};
> > > > +
> > > > +enum alvium_mipi_fmt {
> > > > + ALVIUM_FMT_UYVY8_2X8 = 0,
> > > > + ALVIUM_FMT_UYVY8_1X16,
> > > > + ALVIUM_FMT_YUYV8_1X16,
> > > > + ALVIUM_FMT_YUYV8_2X8,
> > > > + ALVIUM_FMT_YUYV10_1X20,
> > > > + ALVIUM_FMT_RGB888_1X24,
> > > > + ALVIUM_FMT_RBG888_1X24,
> > > > + ALVIUM_FMT_BGR888_1X24,
> > > > + ALVIUM_FMT_RGB888_3X8,
> > > > + ALVIUM_FMT_Y8_1X8,
> > > > + ALVIUM_FMT_SGRBG8_1X8,
> > > > + ALVIUM_FMT_SRGGB8_1X8,
> > > > + ALVIUM_FMT_SGBRG8_1X8,
> > > > + ALVIUM_FMT_SBGGR8_1X8,
> > > > + ALVIUM_FMT_Y10_1X10,
> > > > + ALVIUM_FMT_SGRBG10_1X10,
> > > > + ALVIUM_FMT_SRGGB10_1X10,
> > > > + ALVIUM_FMT_SGBRG10_1X10,
> > > > + ALVIUM_FMT_SBGGR10_1X10,
> > > > + ALVIUM_FMT_Y12_1X12,
> > > > + ALVIUM_FMT_SGRBG12_1X12,
> > > > + ALVIUM_FMT_SRGGB12_1X12,
> > > > + ALVIUM_FMT_SGBRG12_1X12,
> > > > + ALVIUM_FMT_SBGGR12_1X12,
> > > > + ALVIUM_FMT_SBGGR14_1X14,
> > > > + ALVIUM_FMT_SGBRG14_1X14,
> > > > + ALVIUM_FMT_SRGGB14_1X14,
> > > > + ALVIUM_FMT_SGRBG14_1X14,
> > > > + ALVIUM_NUM_SUPP_MIPI_DATA_FMT
> > > > +};
> > > > +
> > > > +enum alvium_av_bayer_bit {
> > > > + ALVIUM_BIT_BAY_NONE = -1,
> > > > + ALVIUM_BIT_BAY_MONO = 0,
> > > > + ALVIUM_BIT_BAY_GR,
> > > > + ALVIUM_BIT_BAY_RG,
> > > > + ALVIUM_BIT_BAY_GB,
> > > > + ALVIUM_BIT_BAY_BG,
> > > > + ALVIUM_NUM_BAY_AV_BIT
> > > > +};
> > > > +
> > > > +enum alvium_av_mipi_bit {
> > > > + ALVIUM_BIT_YUV420_8_LEG = 0,
> > > > + ALVIUM_BIT_YUV420_8,
> > > > + ALVIUM_BIT_YUV420_10,
> > > > + ALVIUM_BIT_YUV420_8_CSPS,
> > > > + ALVIUM_BIT_YUV420_10_CSPS,
> > > > + ALVIUM_BIT_YUV422_8,
> > > > + ALVIUM_BIT_YUV422_10,
> > > > + ALVIUM_BIT_RGB888,
> > > > + ALVIUM_BIT_RGB666,
> > > > + ALVIUM_BIT_RGB565,
> > > > + ALVIUM_BIT_RGB555,
> > > > + ALVIUM_BIT_RGB444,
> > > > + ALVIUM_BIT_RAW6,
> > > > + ALVIUM_BIT_RAW7,
> > > > + ALVIUM_BIT_RAW8,
> > > > + ALVIUM_BIT_RAW10,
> > > > + ALVIUM_BIT_RAW12,
> > > > + ALVIUM_BIT_RAW14,
> > > > + ALVIUM_BIT_JPEG,
> > > > + ALVIUM_NUM_SUPP_MIPI_DATA_BIT
> > > > +};
> > > > +
> > > > +typedef struct {
> > >
> > > No typedef please, name this
> > >
> > > struct alvium_bcrm_vers
> > >
> > > and use it as-is in the code. Same below.
> >
> > Oks.
> >
> > > > + u16 minor;
> > > > + u16 major;
> > > > +} alvium_bcrm_vers_t;
> > > > +
> > > > +typedef struct {
> > > > + u8 special;
> > > > + u8 major;
> > > > + u16 minor;
> > > > + u32 patch;
> > > > +} alvium_fw_vers_t;
> > > > +
> > > > +typedef struct {
> > > > + u8 rev_x:1;
> > > > + u8 rev_y:1;
> > > > + u8 int_autop:1;
> > > > + u8 black_lvl:1;
> > > > + u8 gain:1;
> > > > + u8 gamma:1;
> > > > + u8 contrast:1;
> > > > + u8 sat:1;
> > > > + u8 hue:1;
> > > > + u8 whiteb:1;
> > > > + u8 sharp:1;
> > > > + u8 auto_exp:1;
> > > > + u8 auto_gain:1;
> > > > + u8 auto_whiteb:1;
> > > > + u8 dev_temp:1;
> > > > + u8 acq_abort:1;
> > > > + u8 acq_fr:1;
> > > > + u8 fr_trigger:1;
> > > > + u8 exp_acq_line:1;
> > > > +} alvium_avail_feat_t;
> > > > +
> > > > +typedef struct {
> > > > + u8 yuv420_8_leg:1;
> > > > + u8 yuv420_8:1;
> > > > + u8 yuv420_10:1;
> > > > + u8 yuv420_8_csps:1;
> > > > + u8 yuv420_10_csps:1;
> > > > + u8 yuv422_8:1;
> > > > + u8 yuv422_10:1;
> > > > + u8 rgb888:1;
> > > > + u8 rgb666:1;
> > > > + u8 rgb565:1;
> > > > + u8 rgb555:1;
> > > > + u8 rgb444:1;
> > > > + u8 raw6:1;
> > > > + u8 raw7:1;
> > > > + u8 raw8:1;
> > > > + u8 raw10:1;
> > > > + u8 raw12:1;
> > > > + u8 raw14:1;
> > > > + u8 jpeg:1;
> > > > +} alvium_avail_mipi_fmt_t;
> > > > +
> > > > +typedef struct {
> > > > + u8 mono:1;
> > > > + u8 gr:1;
> > > > + u8 rg:1;
> > > > + u8 gb:1;
> > > > + u8 bg:1;
> > > > +} alvium_avail_bayer_t;
> > > > +
> > > > +struct alvium_mode {
> > > > + struct v4l2_rect crop;
> > > > + struct v4l2_mbus_framefmt fmt;
> > > > + u32 width;
> > > > + u32 height;
> > > > +
> > >
> > > Extra blank line.
> >
> > Oks.
> >
> > > > +};
> > > > +
> > > > +struct alvium_pixfmt {
> > > > + u8 id;
> > > > + u32 code;
> > > > + u32 colorspace;
> > > > + u8 fmt_av_bit;
> > > > + u8 bay_av_bit;
> > > > + u64 mipi_fmt_regval;
> > > > + u64 bay_fmt_regval;
> > > > + u8 is_raw;
> > >
> > > By reordering the fields you could save memory.
> >
> > This order make things more clear for me.
> > But if this is a problem I will fix this in v3.
> > Thanks! :)
> >
> > > > +};
> > > > +
> > > > +struct alvium_ctrls {
> > > > + struct v4l2_ctrl_handler handler;
> > > > + struct v4l2_ctrl *pixel_rate;
> > > > + struct v4l2_ctrl *link_freq;
> > > > + struct {
> > > > + struct v4l2_ctrl *auto_exp;
> > > > + struct v4l2_ctrl *exposure;
> > > > + };
> > > > + struct {
> > > > + struct v4l2_ctrl *auto_wb;
> > > > + struct v4l2_ctrl *blue_balance;
> > > > + struct v4l2_ctrl *red_balance;
> > > > + };
> > > > + struct {
> > > > + struct v4l2_ctrl *auto_gain;
> > > > + struct v4l2_ctrl *gain;
> > > > + };
> > > > + struct v4l2_ctrl *saturation;
> > > > + struct v4l2_ctrl *hue;
> > > > + struct v4l2_ctrl *contrast;
> > > > + struct v4l2_ctrl *gamma;
> > > > + struct v4l2_ctrl *sharpness;
> > > > + struct v4l2_ctrl *hflip;
> > > > + struct v4l2_ctrl *vflip;
> > > > +};
> > > > +
> > > > +struct alvium_dev {
> > > > + struct i2c_client *i2c_client;
> > > > + struct v4l2_subdev sd;
> > > > + struct v4l2_fwnode_endpoint ep;
> > > > + struct media_pad pad;
> > > > +
> > > > + struct mutex lock;
> > > > +
> > > > + struct gpio_desc *reset_gpio;
> > > > + struct gpio_desc *pwdn_gpio;
> > > > +
> > > > + u16 bcrm_addr;
> > > > + alvium_bcrm_vers_t bcrm_v;
> > >
> > > This is written but never read, you can drop it.
> > >
> > > > + alvium_fw_vers_t fw_v;
> > >
> > > Same here.
> >
> > Oks.
> >
> > > > +
> > > > + alvium_avail_feat_t avail_ft;
> > > > + u8 is_mipi_fmt_avail[ALVIUM_NUM_SUPP_MIPI_DATA_BIT];
> > > > + u8 is_bay_avail[ALVIUM_NUM_BAY_AV_BIT];
> > > > +
> > > > + u32 min_csi_clk;
> > > > + u32 max_csi_clk;
> > > > + u32 img_min_width;
> > > > + u32 img_max_width;
> > > > + u32 img_inc_width;
> > > > + u32 img_min_height;
> > > > + u32 img_max_height;
> > > > + u32 img_inc_height;
> > > > + u32 min_offx;
> > > > + u32 max_offx;
> > > > + u32 inc_offx;
> > > > + u32 min_offy;
> > > > + u32 max_offy;
> > > > + u32 inc_offy;
> > > > + u64 min_gain;
> > > > + u64 max_gain;
> > > > + u64 inc_gain;
> > > > + u64 min_exp;
> > > > + u64 max_exp;
> > > > + u64 inc_exp;
> > > > + u64 min_rbalance;
> > > > + u64 max_rbalance;
> > > > + u64 inc_rbalance;
> > > > + u64 min_bbalance;
> > > > + u64 max_bbalance;
> > > > + u64 inc_bbalance;
> > > > + s32 min_hue;
> > > > + s32 max_hue;
> > > > + s32 inc_hue;
> > > > + u32 min_contrast;
> > > > + u32 max_contrast;
> > > > + u32 inc_contrast;
> > > > + u32 min_sat;
> > > > + u32 max_sat;
> > > > + u32 inc_sat;
> > > > + s32 min_black_lvl;
> > > > + s32 max_black_lvl;
> > > > + s32 inc_black_lvl;
> > > > + u64 min_gamma;
> > > > + u64 max_gamma;
> > > > + u64 inc_gamma;
> > > > + s32 min_sharp;
> > > > + s32 max_sharp;
> > > > + s32 inc_sharp;
> > > > +
> > > > + u32 streamon_delay;
> > > > +
> > > > + struct alvium_mode mode;
> > >
> > > Please use the subdev active state to store the active format and crop
> > > rectangle. See the imx290 driver, and commit a2514b9a634a ("media: i2c:
> > > imx290: Use V4L2 subdev active state").
> >
> > Mmmm.. Thanks I will check this.
> >
> > > > + struct v4l2_fract frame_interval;
> > > > + u64 min_fr;
> > > > + u64 max_fr;
> > > > + u64 fr;
> > > > +
> > > > + u8 h_sup_csi_lanes;
> > > > + struct clk *xclk;
> > > > + u32 xclk_freq;
> > > > + u32 csi_clk;
> > > > + u64 link_freq;
> > > > +
> > > > + struct alvium_ctrls ctrls;
> > > > +
> > > > + u8 bcrm_mode;
> > > > + u8 hshake_bit;
> > > > +
> > > > + struct alvium_pixfmt *alvium_csi2_fmt;
> > > > + u8 alvium_csi2_fmt_n;
> > > > + struct v4l2_mbus_framefmt fmt;
> > > > +
> > > > + u8 streaming:1;
> > > > + u8 apply_fiv:1;
> > > > +
> > > > + bool upside_down;
> > > > +};
> > > > +
> > > > +static inline struct alvium_dev *sd_to_alvium(struct v4l2_subdev *sd)
> > > > +{
> > > > + return container_of(sd, struct alvium_dev, sd);
> > > > +}
> > > > +
> > > > +static inline struct alvium_dev *i2c_to_alvium(struct i2c_client *client)
> > >
> > > This is only used in alvium_remove(), I would inline it there.
> >
> > Oks.
> >
> > > > +{
> > > > + return sd_to_alvium(i2c_get_clientdata(client));
> > > > +}
> > > > +
> > > > +static inline bool alvium_is_csi2(const struct alvium_dev *alvium)
> > > > +{
> > > > + return alvium->ep.bus_type == V4L2_MBUS_CSI2_DPHY;
> > > > +}
> > >
> > > Only CSI-2 is supported by the driver. Drop this function.
> >
> > Oks.
> >
> > > > +
> > > > +static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
> > > > +{
> > > > + return &container_of(ctrl->handler, struct alvium_dev,
> > > > + ctrls.handler)->sd;
> > > > +}
> > > > +#endif /* ALVIUM_H_ */

Regards,
Tommaso

>
> --
> Regards,
>
> Laurent Pinchart

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