Re: [PATCH v3 2/2] media: i2c: Add GC05A2 image sensor driver

From: Kieran Bingham
Date: Mon Apr 08 2024 - 09:34:51 EST

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In reply to: Zhi Mao (毛智): "Re: [PATCH v3 2/2] media: i2c: Add GC05A2 image sensor driver"
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Quoting Zhi Mao (毛智) (2024-04-08 12:50:21)
> Hi Kieran,
>
> Thanks for your review this patch.
>
> It seems that there are some difficult for us(Mediatek) to explain
> these register setting comments.
> As these settings are released by GC sensor vendor, and we have not
> detailed datasheet described them.
> And even if send the letter to ask sensor vendor, I am afraid there may
> be not a clear response.
>
> Can we just focus on the driver code function and control flow part?
>

As I said - You can take my comments with a pinch of salt ... but I
wanted to know your position on it ;-)

--
Kieran

> On Sun, 2024-04-07 at 10:08 +0100, Kieran Bingham wrote:
> >
> > External email : Please do not click links or open attachments until
> > you have verified the sender or the content.
> > Hello,
> >
> > Thanks for helping extending the kernels sensor driver support.
> >
> > My comments below can likely be taken with a pinch of salt, as they
> > are
> > mostly around the tabled register values ... but we have many drivers
> > which are binary blobs of sensor register values and I think it would
> > be
> > far more beneficial to clean these up where possible...
> >
> > So the first question is ... Can we ?
> >
> >
> >
> > Quoting Zhi Mao (2024-04-03 04:38:25)
> > > Add a V4L2 sub-device driver for Galaxycore GC05A2 image sensor.
> > >
> > > Signed-off-by: Zhi Mao <zhi.mao@xxxxxxxxxxxx>
> > > ---
> > > drivers/media/i2c/Kconfig | 10 +
> > > drivers/media/i2c/Makefile | 1 +
> > > drivers/media/i2c/gc05a2.c | 1383
> > ++++++++++++++++++++++++++++++++++++
> > > 3 files changed, 1394 insertions(+)
> > > create mode 100644 drivers/media/i2c/gc05a2.c
> > >
> > > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> > > index 56f276b920ab..97993bf160f9 100644
> > > --- a/drivers/media/i2c/Kconfig
> > > +++ b/drivers/media/i2c/Kconfig
> > > @@ -70,6 +70,16 @@ config VIDEO_GC0308
> > > To compile this driver as a module, choose M here: the
> > > module will be called gc0308.
> > >
> > > +config VIDEO_GC05A2
> > > + tristate "GalaxyCore gc05a2 sensor support"
> > > + select V4L2_CCI_I2C
> > > + help
> > > + This is a Video4Linux2 sensor driver for the GalaxyCore
> > gc05a2
> > > + camera.
> > > +
> > > + To compile this driver as a module, choose M here: the
> > > + module will be called gc05a2.
> > > +
> > > config VIDEO_GC2145
> > > select V4L2_CCI_I2C
> > > tristate "GalaxyCore GC2145 sensor support"
> > > diff --git a/drivers/media/i2c/Makefile
> > b/drivers/media/i2c/Makefile
> > > index dfbe6448b549..8ed6faf0f854 100644
> > > --- a/drivers/media/i2c/Makefile
> > > +++ b/drivers/media/i2c/Makefile
> > > @@ -38,6 +38,7 @@ obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
> > > obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
> > > obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
> > > obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
> > > +obj-$(CONFIG_VIDEO_GC05A2) += gc05a2.o
> > > obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
> > > obj-$(CONFIG_VIDEO_HI556) += hi556.o
> > > obj-$(CONFIG_VIDEO_HI846) += hi846.o
> > > diff --git a/drivers/media/i2c/gc05a2.c
> > b/drivers/media/i2c/gc05a2.c
> > > new file mode 100644
> > > index 000000000000..461d33055a3b
> > > --- /dev/null
> > > +++ b/drivers/media/i2c/gc05a2.c
> > > @@ -0,0 +1,1383 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Driver for GalaxyCore gc05a2 image sensor
> > > + *
> > > + * Copyright 2024 MediaTek
> > > + *
> > > + * Zhi Mao <zhi.mao@xxxxxxxxxxxx>
> > > + */
> > > +#include <linux/array_size.h>
> > > +#include <linux/bits.h>
> > > +#include <linux/clk.h>
> > > +#include <linux/container_of.h>
> > > +#include <linux/delay.h>
> > > +#include <linux/device.h>
> > > +#include <linux/err.h>
> > > +#include <linux/gpio/consumer.h>
> > > +#include <linux/math64.h>
> > > +#include <linux/mod_devicetable.h>
> > > +#include <linux/pm_runtime.h>
> > > +#include <linux/property.h>
> > > +#include <linux/regulator/consumer.h>
> > > +#include <linux/types.h>
> > > +#include <linux/units.h>
> > > +
> > > +#include <media/v4l2-cci.h>
> > > +#include <media/v4l2-ctrls.h>
> > > +#include <media/v4l2-event.h>
> > > +#include <media/v4l2-fwnode.h>
> > > +#include <media/v4l2-subdev.h>
> > > +
> > > +#define GC05A2_REG_TEST_PATTERN_EN CCI_REG8(0x008c)
> > > +#define GC05A2_REG_TEST_PATTERN_IDX CCI_REG8(0x008d)
> > > +#define GC05A2_TEST_PATTERN_EN 0x01
> > > +
> > > +#define GC05A2_STREAMING_REG CCI_REG8(0x0100)
> > > +
> > > +#define GC05A2_FLIP_REG CCI_REG8(0x0101)
> > > +#define GC05A2_FLIP_H_MASK BIT(0)
> > > +#define GC05A2_FLIP_V_MASK BIT(1)
> > > +
> > > +#define GC05A2_EXP_REG CCI_REG16(0x0202)
> > > +#define GC05A2_EXP_MARGIN 16
> > > +#define GC05A2_EXP_MIN 4
> > > +#define GC05A2_EXP_STEP 1
> > > +
> > > +#define GC05A2_AGAIN_REG CCI_REG16(0x0204)
> > > +#define GC05A2_AGAIN_MIN 1024
> > > +#define GC05A2_AGAIN_MAX (1024 * 16)
> > > +#define GC05A2_AGAIN_STEP 1
> > > +
> > > +#define GC05A2_FRAME_LENGTH_REG CCI_REG16(0x0340)
> > > +#define GC05A2_VTS_MAX 0xffff
> > > +
> > > +#define GC05A2_REG_CHIP_ID CCI_REG16(0x03f0)
> > > +#define GC05A2_CHIP_ID 0x05a2
> > > +
> > > +#define GC05A2_NATIVE_WIDTH 2592
> > > +#define GC05A2_NATIVE_HEIGHT 1944
> > > +
> > > +#define GC05A2_DEFAULT_CLK_FREQ (24 * HZ_PER_MHZ)
> > > +#define GC05A2_MBUS_CODE MEDIA_BUS_FMT_SGRBG10_1X10
> > > +#define GC05A2_DATA_LANES 2
> > > +#define GC05A2_RGB_DEPTH 10
> > > +#define GC05A2_SLEEP_US (2 * USEC_PER_MSEC)
> > > +
> > > +static const char *const gc05a2_test_pattern_menu[] = {
> > > + "No Pattern", "Fade_to_gray_Color Bar", "Color Bar",
> > > + "PN9", "Horizental_gradient", "Checkboard
> > Pattern",
> > > + "Slant", "Resolution", "Solid Black",
> > > + "Solid White",
> > > +};
> > > +
> > > +static const s64 gc05a2_link_freq_menu_items[] = {
> > > + (448 * HZ_PER_MHZ),
> > > + (224 * HZ_PER_MHZ),
> > > +};
> > > +
> > > +static const char *const gc05a2_supply_name[] = {
> > > + "avdd",
> > > + "dvdd",
> > > + "dovdd",
> > > +};
> > > +
> > > +struct gc05a2 {
> > > + struct device *dev;
> > > + struct v4l2_subdev sd;
> > > + struct media_pad pad;
> > > +
> > > + struct clk *xclk;
> > > + struct regulator_bulk_data
> > supplies[ARRAY_SIZE(gc05a2_supply_name)];
> > > + struct gpio_desc *reset_gpio;
> > > +
> > > + struct v4l2_ctrl_handler ctrls;
> > > + struct v4l2_ctrl *pixel_rate;
> > > + struct v4l2_ctrl *link_freq;
> > > + struct v4l2_ctrl *exposure;
> > > + struct v4l2_ctrl *vblank;
> > > + struct v4l2_ctrl *hblank;
> > > + struct v4l2_ctrl *hflip;
> > > + struct v4l2_ctrl *vflip;
> > > +
> > > + struct regmap *regmap;
> > > + unsigned long link_freq_bitmap;
> > > +
> > > + /* True if the device has been identified */
> > > + bool identified;
> > > + const struct gc05a2_mode *cur_mode;
> > > +};
> > > +
> > > +struct gc05a2_reg_list {
> > > + u32 num_of_regs;
> > > + const struct cci_reg_sequence *regs;
> > > +};
> > > +
> > > +static const struct cci_reg_sequence mode_2592x1944[] = {
> > > + /* system */
> > > + { CCI_REG8(0x0135), 0x01 },
> > > +
> > > + /* pre_setting */
> > > + { CCI_REG8(0x0084), 0x21 },
> > > + { CCI_REG8(0x0d05), 0xcc },
> > > + { CCI_REG8(0x0218), 0x00 },
> > > + { CCI_REG8(0x005e), 0x48 },
> > > + { CCI_REG8(0x0d06), 0x01 },
> > > + { CCI_REG8(0x0007), 0x16 },
> > > + { CCI_REG8(0x0101), 0x00 },
> > > +
> > > + /* analog */
> > > + { CCI_REG8(0x0342), 0x07 },
> > > + { CCI_REG8(0x0343), 0x28 },
> > > + { CCI_REG8(0x0220), 0x07 },
> > > + { CCI_REG8(0x0221), 0xd0 },
> > > + { CCI_REG8(0x0202), 0x07 },
> > > + { CCI_REG8(0x0203), 0x32 },
> > > + { CCI_REG8(0x0340), 0x07 },
> > > + { CCI_REG8(0x0341), 0xf0 },
> > > + { CCI_REG8(0x0219), 0x00 },
> > > + { CCI_REG8(0x0346), 0x00 },
> > > + { CCI_REG8(0x0347), 0x04 },
> > > + { CCI_REG8(0x0d14), 0x00 },
> > > + { CCI_REG8(0x0d13), 0x05 },
> > > + { CCI_REG8(0x0d16), 0x05 },
> > > + { CCI_REG8(0x0d15), 0x1d },
> > > + { CCI_REG8(0x00c0), 0x0a },
> > > + { CCI_REG8(0x00c1), 0x30 },
> > > + { CCI_REG8(0x034a), 0x07 },
> > > + { CCI_REG8(0x034b), 0xa8 },
> > > + { CCI_REG8(0x0e0a), 0x00 },
> > > + { CCI_REG8(0x0e0b), 0x00 },
> > > + { CCI_REG8(0x0e0e), 0x03 },
> > > + { CCI_REG8(0x0e0f), 0x00 },
> > > + { CCI_REG8(0x0e06), 0x0a },
> > > + { CCI_REG8(0x0e23), 0x15 },
> > > + { CCI_REG8(0x0e24), 0x15 },
> > > + { CCI_REG8(0x0e2a), 0x10 },
> > > + { CCI_REG8(0x0e2b), 0x10 },
> > > + { CCI_REG8(0x0e17), 0x49 },
> > > + { CCI_REG8(0x0e1b), 0x1c },
> > > + { CCI_REG8(0x0e3a), 0x36 },
> > > + { CCI_REG8(0x0d11), 0x84 },
> > > + { CCI_REG8(0x0e52), 0x14 },
> > > + { CCI_REG8(0x000b), 0x10 },
> > > + { CCI_REG8(0x0008), 0x08 },
> > > + { CCI_REG8(0x0223), 0x17 },
> > > + { CCI_REG8(0x0d27), 0x39 },
> > > + { CCI_REG8(0x0d22), 0x00 },
> > > + { CCI_REG8(0x03f6), 0x0d },
> > > + { CCI_REG8(0x0d04), 0x07 },
> > > + { CCI_REG8(0x03f3), 0x72 },
> > > + { CCI_REG8(0x03f4), 0xb8 },
> > > + { CCI_REG8(0x03f5), 0xbc },
> > > + { CCI_REG8(0x0d02), 0x73 },
> > > +
> > > + /* auto load start */
> > > + { CCI_REG8(0x00cb), 0x00 },
> > > +
> > > + /* OUT 2592*1944 */
> > > + { CCI_REG8(0x0350), 0x01 },
> > > + { CCI_REG8(0x0353), 0x00 },
> > > + { CCI_REG8(0x0354), 0x08 },
> >
> > > + { CCI_REG8(0x034c), 0x0a },
> > > + { CCI_REG8(0x034d), 0x20 },
> >
> > Should/Could this be
> > { CCI_REG16(0x034c), 2592 }, /* Width */
> >
> >
> > > + { CCI_REG8(0x021f), 0x14 },
> > > +
> > > + /* MIPI */
> > > + { CCI_REG8(0x0107), 0x05 },
> > > + { CCI_REG8(0x0117), 0x01 },
> > > + { CCI_REG8(0x0d81), 0x00 },
> > > + { CCI_REG8(0x0d84), 0x0c },
> > > + { CCI_REG8(0x0d85), 0xa8 },
> > > + { CCI_REG8(0x0d86), 0x06 },
> > > + { CCI_REG8(0x0d87), 0x55 },
> > > + { CCI_REG8(0x0db3), 0x06 },
> > > + { CCI_REG8(0x0db4), 0x08 },
> > > + { CCI_REG8(0x0db5), 0x1e },
> > > + { CCI_REG8(0x0db6), 0x02 },
> > > + { CCI_REG8(0x0db8), 0x12 },
> > > + { CCI_REG8(0x0db9), 0x0a },
> > > + { CCI_REG8(0x0d93), 0x06 },
> > > + { CCI_REG8(0x0d94), 0x09 },
> > > + { CCI_REG8(0x0d95), 0x0d },
> > > + { CCI_REG8(0x0d99), 0x0b },
> > > + { CCI_REG8(0x0084), 0x01 },
> > > +
> > > + /* OUT */
> > > + { CCI_REG8(0x0110), 0x01 },
> > > +};
> > > +
> > > +static const struct cci_reg_sequence mode_1280x720[] = {
> > > + /* system */
> > > + { CCI_REG8(0x0135), 0x05 },
> >
> > In 2592x1944 this is 0x01. Do you have a datasheet? Can you explain
> > why
> > they are different? Can you add register definitions that have names
> > to
> > make this more maintainable or extendable in the future?
> >
> > There's discussion in the recent series improving the IMX258 which
> > makes
> > me wonder if we should try harder to have sensor drivers with clearer
> > definitions.
> >
> >
> > > +
> > > + /*pre_setting*/
> >
> > /* pre_setting */ ?
> >
> > > + { CCI_REG8(0x0084), 0x21 },
> > > + { CCI_REG8(0x0d05), 0xcc },
> > > + { CCI_REG8(0x0218), 0x80 },
> > > + { CCI_REG8(0x005e), 0x49 },
> > > + { CCI_REG8(0x0d06), 0x81 },
> > > + { CCI_REG8(0x0007), 0x16 },
> > > + { CCI_REG8(0x0101), 0x00 },
> >
> > In 2592x1944, only register 0x0218 differs. Why? What is that? Can it
> > be
> > broken out to a function that applies the correct configuration at
> > startuup based on a parameter instead of duplicating this table set?
> >
> > > +
> > > + /* analog */
> > > + { CCI_REG8(0x0342), 0x07 },
> > > + { CCI_REG8(0x0343), 0x10 },
> > > + { CCI_REG8(0x0220), 0x07 },
> > > + { CCI_REG8(0x0221), 0xd0 },
> > > + { CCI_REG8(0x0202), 0x03 },
> > > + { CCI_REG8(0x0203), 0x32 },
> > > + { CCI_REG8(0x0340), 0x04 },
> > > + { CCI_REG8(0x0341), 0x08 },
> > > + { CCI_REG8(0x0219), 0x00 },
> > > + { CCI_REG8(0x0346), 0x01 },
> > > + { CCI_REG8(0x0347), 0x00 },
> > > + { CCI_REG8(0x0d14), 0x00 },
> > > + { CCI_REG8(0x0d13), 0x05 },
> > > + { CCI_REG8(0x0d16), 0x05 },
> > > + { CCI_REG8(0x0d15), 0x1d },
> > > + { CCI_REG8(0x00c0), 0x0a },
> > > + { CCI_REG8(0x00c1), 0x30 },
> > > + { CCI_REG8(0x034a), 0x05 },
> > > + { CCI_REG8(0x034b), 0xb0 },
> > > + { CCI_REG8(0x0e0a), 0x00 },
> > > + { CCI_REG8(0x0e0b), 0x00 },
> > > + { CCI_REG8(0x0e0e), 0x03 },
> > > + { CCI_REG8(0x0e0f), 0x00 },
> > > + { CCI_REG8(0x0e06), 0x0a },
> > > + { CCI_REG8(0x0e23), 0x15 },
> > > + { CCI_REG8(0x0e24), 0x15 },
> > > + { CCI_REG8(0x0e2a), 0x10 },
> > > + { CCI_REG8(0x0e2b), 0x10 },
> > > + { CCI_REG8(0x0e17), 0x49 },
> > > + { CCI_REG8(0x0e1b), 0x1c },
> > > + { CCI_REG8(0x0e3a), 0x36 },
> > > + { CCI_REG8(0x0d11), 0x84 },
> > > + { CCI_REG8(0x0e52), 0x14 },
> > > + { CCI_REG8(0x000b), 0x0e },
> > > + { CCI_REG8(0x0008), 0x03 },
> > > + { CCI_REG8(0x0223), 0x16 },
> > > + { CCI_REG8(0x0d27), 0x39 },
> > > + { CCI_REG8(0x0d22), 0x00 },
> > > + { CCI_REG8(0x03f6), 0x0d },
> > > + { CCI_REG8(0x0d04), 0x07 },
> > > + { CCI_REG8(0x03f3), 0x72 },
> > > + { CCI_REG8(0x03f4), 0xb8 },
> > > + { CCI_REG8(0x03f5), 0xbc },
> > > + { CCI_REG8(0x0d02), 0x73 },
> > > +
> >
> > Are any of those able to be broken out to named register to be more
> > clear in their intent?
> >
> > > + /* auto load start */
> > > + { CCI_REG8(0x00cb), 0xfc },
> > > +
> >
> > Why is this auto load start so different to the other modes 'auto
> > load
> > start'? What do the bits refer to ?
> >
> > > + /* OUT 1280x720 */
> > > + { CCI_REG8(0x0350), 0x01 },
> > > + { CCI_REG8(0x0353), 0x00 },
> > > + { CCI_REG8(0x0354), 0x0c },
> >
> > > + { CCI_REG8(0x034c), 0x05 },
> > > + { CCI_REG8(0x034d), 0x00 },
> >
> > Should/Could this be
> > { CCI_REG16(0x034c), 1280 },
> >
> > Are there any other register settings that would make more sense to
> > be
> > in decimal units that match their actual context?
> >
> >
> > > + { CCI_REG8(0x021f), 0x14 },
> >
> > I don't see a setting for 720/0x2d0. Do these registers only set the
> > width?
> >
> > > +
> > > + /* MIPI */
> > > + { CCI_REG8(0x0107), 0x05 },
> > > + { CCI_REG8(0x0117), 0x01 },
> > > + { CCI_REG8(0x0d81), 0x00 },
> > > + { CCI_REG8(0x0d84), 0x06 },
> > > + { CCI_REG8(0x0d85), 0x40 },
> > > + { CCI_REG8(0x0d86), 0x03 },
> > > + { CCI_REG8(0x0d87), 0x21 },
> > > + { CCI_REG8(0x0db3), 0x03 },
> > > + { CCI_REG8(0x0db4), 0x04 },
> > > + { CCI_REG8(0x0db5), 0x0d },
> > > + { CCI_REG8(0x0db6), 0x01 },
> > > + { CCI_REG8(0x0db8), 0x04 },
> > > + { CCI_REG8(0x0db9), 0x06 },
> > > + { CCI_REG8(0x0d93), 0x03 },
> > > + { CCI_REG8(0x0d94), 0x04 },
> > > + { CCI_REG8(0x0d95), 0x05 },
> > > + { CCI_REG8(0x0d99), 0x06 },
> > > + { CCI_REG8(0x0084), 0x01 },
> > > +
> > > + /* OUT */
> >
> > Out where? What is out?
> >
> > > + { CCI_REG8(0x0110), 0x01 },
> > > +};
> > > +
> > > +static const struct cci_reg_sequence mode_table_common[] = {
> > > + { GC05A2_STREAMING_REG, 0x00 },
> > > + /* system */
> > > + { CCI_REG8(0x0315), 0xd4 },
> > > + { CCI_REG8(0x0d06), 0x01 },
> > > + { CCI_REG8(0x0a70), 0x80 },
> > > + { CCI_REG8(0x031a), 0x00 },
> > > + { CCI_REG8(0x0314), 0x00 },
> > > + { CCI_REG8(0x0130), 0x08 },
> > > + { CCI_REG8(0x0132), 0x01 },
> > > + { CCI_REG8(0x0136), 0x38 },
> > > + { CCI_REG8(0x0137), 0x03 },
> > > + { CCI_REG8(0x0134), 0x5b },
> > > + { CCI_REG8(0x031c), 0xe0 },
> > > + { CCI_REG8(0x0d82), 0x14 },
> > > + { CCI_REG8(0x0dd1), 0x56 },
> > > +
> > > + /* gate_mode */
> > > + { CCI_REG8(0x0af4), 0x01 },
> > > + { CCI_REG8(0x0002), 0x10 },
> > > + { CCI_REG8(0x00c3), 0x34 },
> > > +
> > > + /* auto load start */
> >
> > The previous 'auto load start' referenced 0x00cb ?
> >
> > > + { CCI_REG8(0x00c4), 0x00 },
> > > + { CCI_REG8(0x00c5), 0x01 },
> > > + { CCI_REG8(0x0af6), 0x00 },
> > > + { CCI_REG8(0x0ba0), 0x17 },
> > > + { CCI_REG8(0x0ba1), 0x00 },
> > > + { CCI_REG8(0x0ba2), 0x00 },
> > > + { CCI_REG8(0x0ba3), 0x00 },
> > > + { CCI_REG8(0x0ba4), 0x03 },
> > > + { CCI_REG8(0x0ba5), 0x00 },
> > > + { CCI_REG8(0x0ba6), 0x00 },
> > > + { CCI_REG8(0x0ba7), 0x00 },
> > > + { CCI_REG8(0x0ba8), 0x40 },
> > > + { CCI_REG8(0x0ba9), 0x00 },
> > > + { CCI_REG8(0x0baa), 0x00 },
> > > + { CCI_REG8(0x0bab), 0x00 },
> > > + { CCI_REG8(0x0bac), 0x40 },
> > > + { CCI_REG8(0x0bad), 0x00 },
> > > + { CCI_REG8(0x0bae), 0x00 },
> > > + { CCI_REG8(0x0baf), 0x00 },
> > > + { CCI_REG8(0x0bb0), 0x02 },
> > > + { CCI_REG8(0x0bb1), 0x00 },
> > > + { CCI_REG8(0x0bb2), 0x00 },
> > > + { CCI_REG8(0x0bb3), 0x00 },
> > > + { CCI_REG8(0x0bb8), 0x02 },
> > > + { CCI_REG8(0x0bb9), 0x00 },
> > > + { CCI_REG8(0x0bba), 0x00 },
> > > + { CCI_REG8(0x0bbb), 0x00 },
> > > + { CCI_REG8(0x0a70), 0x80 },
> > > + { CCI_REG8(0x0a71), 0x00 },
> > > + { CCI_REG8(0x0a72), 0x00 },
> > > + { CCI_REG8(0x0a66), 0x00 },
> > > + { CCI_REG8(0x0a67), 0x80 },
> > > + { CCI_REG8(0x0a4d), 0x4e },
> > > + { CCI_REG8(0x0a50), 0x00 },
> > > + { CCI_REG8(0x0a4f), 0x0c },
> > > + { CCI_REG8(0x0a66), 0x00 },
> > > + { CCI_REG8(0x00ca), 0x00 },
> > > + { CCI_REG8(0x00cc), 0x00 },
> > > + { CCI_REG8(0x00cd), 0x00 },
> > > + { CCI_REG8(0x0aa1), 0x00 },
> > > + { CCI_REG8(0x0aa2), 0xe0 },
> > > + { CCI_REG8(0x0aa3), 0x00 },
> > > + { CCI_REG8(0x0aa4), 0x40 },
> > > + { CCI_REG8(0x0a90), 0x03 },
> > > + { CCI_REG8(0x0a91), 0x0e },
> > > + { CCI_REG8(0x0a94), 0x80 },
> > > +
> > > + /* standby */
> > > + { CCI_REG8(0x0af6), 0x20 },
> > > + { CCI_REG8(0x0b00), 0x91 },
> > > + { CCI_REG8(0x0b01), 0x17 },
> > > + { CCI_REG8(0x0b02), 0x01 },
> > > + { CCI_REG8(0x0b03), 0x00 },
> > > + { CCI_REG8(0x0b04), 0x01 },
> > > + { CCI_REG8(0x0b05), 0x17 },
> > > + { CCI_REG8(0x0b06), 0x01 },
> > > + { CCI_REG8(0x0b07), 0x00 },
> > > + { CCI_REG8(0x0ae9), 0x01 },
> > > + { CCI_REG8(0x0aea), 0x02 },
> > > + { CCI_REG8(0x0ae8), 0x53 },
> > > + { CCI_REG8(0x0ae8), 0x43 },
> > > +
> > > + /* gain_partition */
> > > + { CCI_REG8(0x0af6), 0x30 },
> > > + { CCI_REG8(0x0b00), 0x08 },
> > > + { CCI_REG8(0x0b01), 0x0f },
> > > + { CCI_REG8(0x0b02), 0x00 },
> > > + { CCI_REG8(0x0b04), 0x1c },
> > > + { CCI_REG8(0x0b05), 0x24 },
> > > + { CCI_REG8(0x0b06), 0x00 },
> > > + { CCI_REG8(0x0b08), 0x30 },
> > > + { CCI_REG8(0x0b09), 0x40 },
> > > + { CCI_REG8(0x0b0a), 0x00 },
> > > + { CCI_REG8(0x0b0c), 0x0e },
> > > + { CCI_REG8(0x0b0d), 0x2a },
> > > + { CCI_REG8(0x0b0e), 0x00 },
> > > + { CCI_REG8(0x0b10), 0x0e },
> > > + { CCI_REG8(0x0b11), 0x2b },
> > > + { CCI_REG8(0x0b12), 0x00 },
> > > + { CCI_REG8(0x0b14), 0x0e },
> > > + { CCI_REG8(0x0b15), 0x23 },
> > > + { CCI_REG8(0x0b16), 0x00 },
> > > + { CCI_REG8(0x0b18), 0x0e },
> > > + { CCI_REG8(0x0b19), 0x24 },
> > > + { CCI_REG8(0x0b1a), 0x00 },
> > > + { CCI_REG8(0x0b1c), 0x0c },
> > > + { CCI_REG8(0x0b1d), 0x0c },
> > > + { CCI_REG8(0x0b1e), 0x00 },
> > > + { CCI_REG8(0x0b20), 0x03 },
> > > + { CCI_REG8(0x0b21), 0x03 },
> > > + { CCI_REG8(0x0b22), 0x00 },
> > > + { CCI_REG8(0x0b24), 0x0e },
> > > + { CCI_REG8(0x0b25), 0x0e },
> > > + { CCI_REG8(0x0b26), 0x00 },
> > > + { CCI_REG8(0x0b28), 0x03 },
> > > + { CCI_REG8(0x0b29), 0x03 },
> > > + { CCI_REG8(0x0b2a), 0x00 },
> > > + { CCI_REG8(0x0b2c), 0x12 },
> > > + { CCI_REG8(0x0b2d), 0x12 },
> > > + { CCI_REG8(0x0b2e), 0x00 },
> > > + { CCI_REG8(0x0b30), 0x08 },
> > > + { CCI_REG8(0x0b31), 0x08 },
> > > + { CCI_REG8(0x0b32), 0x00 },
> > > + { CCI_REG8(0x0b34), 0x14 },
> > > + { CCI_REG8(0x0b35), 0x14 },
> > > + { CCI_REG8(0x0b36), 0x00 },
> > > + { CCI_REG8(0x0b38), 0x10 },
> > > + { CCI_REG8(0x0b39), 0x10 },
> > > + { CCI_REG8(0x0b3a), 0x00 },
> > > + { CCI_REG8(0x0b3c), 0x16 },
> > > + { CCI_REG8(0x0b3d), 0x16 },
> > > + { CCI_REG8(0x0b3e), 0x00 },
> > > + { CCI_REG8(0x0b40), 0x10 },
> > > + { CCI_REG8(0x0b41), 0x10 },
> > > + { CCI_REG8(0x0b42), 0x00 },
> > > + { CCI_REG8(0x0b44), 0x19 },
> > > + { CCI_REG8(0x0b45), 0x19 },
> > > + { CCI_REG8(0x0b46), 0x00 },
> > > + { CCI_REG8(0x0b48), 0x16 },
> > > + { CCI_REG8(0x0b49), 0x16 },
> > > + { CCI_REG8(0x0b4a), 0x00 },
> > > + { CCI_REG8(0x0b4c), 0x19 },
> > > + { CCI_REG8(0x0b4d), 0x19 },
> > > + { CCI_REG8(0x0b4e), 0x00 },
> > > + { CCI_REG8(0x0b50), 0x16 },
> > > + { CCI_REG8(0x0b51), 0x16 },
> > > + { CCI_REG8(0x0b52), 0x00 },
> > > + { CCI_REG8(0x0b80), 0x01 },
> > > + { CCI_REG8(0x0b81), 0x00 },
> > > + { CCI_REG8(0x0b82), 0x00 },
> > > + { CCI_REG8(0x0b84), 0x00 },
> > > + { CCI_REG8(0x0b85), 0x00 },
> > > + { CCI_REG8(0x0b86), 0x00 },
> > > + { CCI_REG8(0x0b88), 0x01 },
> > > + { CCI_REG8(0x0b89), 0x6a },
> > > + { CCI_REG8(0x0b8a), 0x00 },
> > > + { CCI_REG8(0x0b8c), 0x00 },
> > > + { CCI_REG8(0x0b8d), 0x01 },
> > > + { CCI_REG8(0x0b8e), 0x00 },
> > > + { CCI_REG8(0x0b90), 0x01 },
> > > + { CCI_REG8(0x0b91), 0xf6 },
> > > + { CCI_REG8(0x0b92), 0x00 },
> > > + { CCI_REG8(0x0b94), 0x00 },
> > > + { CCI_REG8(0x0b95), 0x02 },
> > > + { CCI_REG8(0x0b96), 0x00 },
> > > + { CCI_REG8(0x0b98), 0x02 },
> > > + { CCI_REG8(0x0b99), 0xc4 },
> > > + { CCI_REG8(0x0b9a), 0x00 },
> > > + { CCI_REG8(0x0b9c), 0x00 },
> > > + { CCI_REG8(0x0b9d), 0x03 },
> > > + { CCI_REG8(0x0b9e), 0x00 },
> > > + { CCI_REG8(0x0ba0), 0x03 },
> > > + { CCI_REG8(0x0ba1), 0xd8 },
> > > + { CCI_REG8(0x0ba2), 0x00 },
> > > + { CCI_REG8(0x0ba4), 0x00 },
> > > + { CCI_REG8(0x0ba5), 0x04 },
> > > + { CCI_REG8(0x0ba6), 0x00 },
> > > + { CCI_REG8(0x0ba8), 0x05 },
> > > + { CCI_REG8(0x0ba9), 0x4d },
> > > + { CCI_REG8(0x0baa), 0x00 },
> > > + { CCI_REG8(0x0bac), 0x00 },
> > > + { CCI_REG8(0x0bad), 0x05 },
> > > + { CCI_REG8(0x0bae), 0x00 },
> > > + { CCI_REG8(0x0bb0), 0x07 },
> > > + { CCI_REG8(0x0bb1), 0x3e },
> > > + { CCI_REG8(0x0bb2), 0x00 },
> > > + { CCI_REG8(0x0bb4), 0x00 },
> > > + { CCI_REG8(0x0bb5), 0x06 },
> > > + { CCI_REG8(0x0bb6), 0x00 },
> > > + { CCI_REG8(0x0bb8), 0x0a },
> > > + { CCI_REG8(0x0bb9), 0x1a },
> > > + { CCI_REG8(0x0bba), 0x00 },
> > > + { CCI_REG8(0x0bbc), 0x09 },
> > > + { CCI_REG8(0x0bbd), 0x36 },
> > > + { CCI_REG8(0x0bbe), 0x00 },
> > > + { CCI_REG8(0x0bc0), 0x0e },
> > > + { CCI_REG8(0x0bc1), 0x66 },
> > > + { CCI_REG8(0x0bc2), 0x00 },
> > > + { CCI_REG8(0x0bc4), 0x10 },
> > > + { CCI_REG8(0x0bc5), 0x06 },
> > > + { CCI_REG8(0x0bc6), 0x00 },
> > > + { CCI_REG8(0x02c1), 0xe0 },
> > > + { CCI_REG8(0x0207), 0x04 },
> > > + { CCI_REG8(0x02c2), 0x10 },
> > > + { CCI_REG8(0x02c3), 0x74 },
> > > + { CCI_REG8(0x02c5), 0x09 },
> > > + { CCI_REG8(0x02c1), 0xe0 },
> > > + { CCI_REG8(0x0207), 0x04 },
> > > + { CCI_REG8(0x02c2), 0x10 },
> > > + { CCI_REG8(0x02c5), 0x09 },
> > > + { CCI_REG8(0x02c1), 0xe0 },
> > > + { CCI_REG8(0x0207), 0x04 },
> > > + { CCI_REG8(0x02c2), 0x10 },
> > > + { CCI_REG8(0x02c5), 0x09 },
> > > +
> > > + /* auto load CH_GAIN */
> > > + { CCI_REG8(0x0aa1), 0x15 },
> > > + { CCI_REG8(0x0aa2), 0x50 },
> > > + { CCI_REG8(0x0aa3), 0x00 },
> > > + { CCI_REG8(0x0aa4), 0x09 },
> > > + { CCI_REG8(0x0a90), 0x25 },
> > > + { CCI_REG8(0x0a91), 0x0e },
> > > + { CCI_REG8(0x0a94), 0x80 },
> > > +
> > > + /* ISP */
> > > + { CCI_REG8(0x0050), 0x00 },
> > > + { CCI_REG8(0x0089), 0x83 },
> > > + { CCI_REG8(0x005a), 0x40 },
> > > + { CCI_REG8(0x00c3), 0x35 },
> > > + { CCI_REG8(0x00c4), 0x80 },
> > > + { CCI_REG8(0x0080), 0x10 },
> > > + { CCI_REG8(0x0040), 0x12 },
> > > + { CCI_REG8(0x0053), 0x0a },
> > > + { CCI_REG8(0x0054), 0x44 },
> > > + { CCI_REG8(0x0055), 0x32 },
> > > + { CCI_REG8(0x0058), 0x89 },
> > > + { CCI_REG8(0x004a), 0x03 },
> > > + { CCI_REG8(0x0048), 0xf0 },
> > > + { CCI_REG8(0x0049), 0x0f },
> > > + { CCI_REG8(0x0041), 0x20 },
> > > + { CCI_REG8(0x0043), 0x0a },
> > > + { CCI_REG8(0x009d), 0x08 },
> > > + { CCI_REG8(0x0236), 0x40 },
> > > +
> > > + /* gain */
> >
> > Is the gain configurable? Is this analogue gain? digital gain? or
> > colour
> > balanace gains ?
> >
> >
> > > + { CCI_REG8(0x0204), 0x04 },
> > > + { CCI_REG8(0x0205), 0x00 },
> > > + { CCI_REG8(0x02b3), 0x00 },
> > > + { CCI_REG8(0x02b4), 0x00 },
> > > + { CCI_REG8(0x009e), 0x01 },
> > > + { CCI_REG8(0x009f), 0x94 },
> > > +
> > > + /* auto load REG */
> > > + { CCI_REG8(0x0aa1), 0x10 },
> > > + { CCI_REG8(0x0aa2), 0xf8 },
> > > + { CCI_REG8(0x0aa3), 0x00 },
> > > + { CCI_REG8(0x0aa4), 0x1f },
> > > + { CCI_REG8(0x0a90), 0x11 },
> > > + { CCI_REG8(0x0a91), 0x0e },
> > > + { CCI_REG8(0x0a94), 0x80 },
> > > + { CCI_REG8(0x03fe), 0x00 },
> > > + { CCI_REG8(0x0a90), 0x00 },
> > > + { CCI_REG8(0x0a70), 0x00 },
> > > + { CCI_REG8(0x0a67), 0x00 },
> > > + { CCI_REG8(0x0af4), 0x29 },
> > > +
> > > + /* DPHY */
> > > + { CCI_REG8(0x0d80), 0x07 },
> > > + { CCI_REG8(0x0dd3), 0x18 },
> > > +
> > > + /* CISCTL_Reset */
> > > + { CCI_REG8(0x031c), 0x80 },
> > > + { CCI_REG8(0x03fe), 0x30 },
> > > + { CCI_REG8(0x0d17), 0x06 },
> > > + { CCI_REG8(0x03fe), 0x00 },
> > > + { CCI_REG8(0x0d17), 0x00 },
> > > + { CCI_REG8(0x031c), 0x93 },
> > > + { CCI_REG8(0x03fe), 0x00 },
> > > + { CCI_REG8(0x031c), 0x80 },
> > > + { CCI_REG8(0x03fe), 0x30 },
> > > + { CCI_REG8(0x0d17), 0x06 },
> > > + { CCI_REG8(0x03fe), 0x00 },
> > > + { CCI_REG8(0x0d17), 0x00 },
> > > + { CCI_REG8(0x031c), 0x93 },
> > > +};
> > > +
> > > +struct gc05a2_mode {
> > > + u32 width;
> > > + u32 height;
> > > + const struct gc05a2_reg_list reg_list;
> > > +
> > > + u32 hts; /* Horizontal timining size */
> > > + u32 vts_def; /* Default vertical timining size */
> > > + u32 vts_min; /* Min vertical timining size */
> > > +};
> > > +
> > > +/* Declare modes in order, from biggest to smallest height. */
> > > +static const struct gc05a2_mode gc05a2_modes[] = {
> > > + {
> > > + /* 2592*1944@30fps */
> > > + .width = GC05A2_NATIVE_WIDTH,
> > > + .height = GC05A2_NATIVE_HEIGHT,
> > > + .reg_list = {
> > > + .num_of_regs = ARRAY_SIZE(mode_2592x1944),
> > > + .regs = mode_2592x1944,
> > > + },
> > > + .hts = 3664,
> > > + .vts_def = 2032,
> > > + .vts_min = 2032,
> > > + },
> > > + {
> > > + /* 1280*720@60fps */
> > > + .width = 1280,
> > > + .height = 720,
> > > + .reg_list = {
> > > + .num_of_regs = ARRAY_SIZE(mode_1280x720),
> > > + .regs = mode_1280x720,
> > > + },
> > > + .hts = 3616,
> > > + .vts_def = 1032,
> > > + .vts_min = 1032,
> > > + },
> > > +};
> > > +
> > > +static inline struct gc05a2 *to_gc05a2(struct v4l2_subdev *sd)
> > > +{
> > > + return container_of(sd, struct gc05a2, sd);
> > > +}
> > > +
> > > +static int gc05a2_power_on(struct device *dev)
> > > +{
> > > + struct v4l2_subdev *sd = dev_get_drvdata(dev);
> > > + struct gc05a2 *gc05a2 = to_gc05a2(sd);
> > > + int ret;
> > > +
> > > + ret = regulator_bulk_enable(ARRAY_SIZE(gc05a2_supply_name),
> > > + gc05a2->supplies);
> > > + if (ret < 0) {
> > > + dev_err(gc05a2->dev, "failed to enable regulators:
> > %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + ret = clk_prepare_enable(gc05a2->xclk);
> > > + if (ret < 0) {
> > >
> > + regulator_bulk_disable(ARRAY_SIZE(gc05a2_supply_name)
> > ,
> > > + gc05a2->supplies);
> > > + dev_err(gc05a2->dev, "clk prepare enable
> > failed\n");
> > > + return ret;
> > > + }
> > > +
> > > + fsleep(GC05A2_SLEEP_US);
> > > +
> > > + gpiod_set_value_cansleep(gc05a2->reset_gpio, 0);
> > > + fsleep(GC05A2_SLEEP_US);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_power_off(struct device *dev)
> > > +{
> > > + struct v4l2_subdev *sd = dev_get_drvdata(dev);
> > > + struct gc05a2 *gc05a2 = to_gc05a2(sd);
> > > +
> > > + clk_disable_unprepare(gc05a2->xclk);
> > > + gpiod_set_value_cansleep(gc05a2->reset_gpio, 1);
> > > + regulator_bulk_disable(ARRAY_SIZE(gc05a2_supply_name),
> > > + gc05a2->supplies);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_enum_mbus_code(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state
> > *sd_state,
> > > + struct v4l2_subdev_mbus_code_enum
> > *code)
> > > +{
> > > + if (code->index > 0)
> > > + return -EINVAL;
> > > +
> > > + code->code = GC05A2_MBUS_CODE;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_enum_frame_size(struct v4l2_subdev *subdev,
> > > + struct v4l2_subdev_state
> > *sd_state,
> > > + struct
> > v4l2_subdev_frame_size_enum *fse)
> > > +{
> > > + if (fse->code != GC05A2_MBUS_CODE)
> > > + return -EINVAL;
> > > +
> > > + if (fse->index >= ARRAY_SIZE(gc05a2_modes))
> > > + return -EINVAL;
> > > +
> > > + fse->min_width = gc05a2_modes[fse->index].width;
> > > + fse->max_width = gc05a2_modes[fse->index].width;
> > > + fse->min_height = gc05a2_modes[fse->index].height;
> > > + fse->max_height = gc05a2_modes[fse->index].height;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_update_cur_mode_controls(struct gc05a2 *gc05a2,
> > > + const struct gc05a2_mode
> > *mode)
> > > +{
> > > + s64 exposure_max, h_blank;
> > > + int ret;
> > > +
> > > + ret = __v4l2_ctrl_modify_range(gc05a2->vblank,
> > > + mode->vts_min - mode-
> > >height,
> > > + GC05A2_VTS_MAX - mode-
> > >height, 1,
> > > + mode->vts_def - mode-
> > >height);
> > > + if (ret) {
> > > + dev_err(gc05a2->dev, "VB ctrl range update
> > failed\n");
> > > + return ret;
> > > + }
> > > +
> > > + h_blank = mode->hts - mode->width;
> > > + ret = __v4l2_ctrl_modify_range(gc05a2->hblank, h_blank,
> > h_blank, 1,
> > > + h_blank);
> > > + if (ret) {
> > > + dev_err(gc05a2->dev, "HB ctrl range update
> > failed\n");
> > > + return ret;
> > > + }
> > > +
> > > + exposure_max = mode->vts_def - GC05A2_EXP_MARGIN;
> > > + ret = __v4l2_ctrl_modify_range(gc05a2->exposure,
> > GC05A2_EXP_MIN,
> > > + exposure_max,
> > GC05A2_EXP_STEP,
> > > + exposure_max);
> > > + if (ret) {
> > > + dev_err(gc05a2->dev, "exposure ctrl range update
> > failed\n");
> > > + return ret;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void gc05a2_update_pad_format(struct gc05a2 *gc08a3,
> > > + const struct gc05a2_mode
> > *mode,
> > > + struct v4l2_mbus_framefmt
> > *fmt)
> > > +{
> > > + fmt->width = mode->width;
> > > + fmt->height = mode->height;
> > > + fmt->code = GC05A2_MBUS_CODE;
> > > + fmt->field = V4L2_FIELD_NONE;
> > > + fmt->colorspace = V4L2_COLORSPACE_RAW;
> > > + fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt-
> > >colorspace);
> > > + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
> > > + fmt->xfer_func = V4L2_XFER_FUNC_NONE;
> > > +}
> > > +
> > > +static int gc05a2_set_format(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + struct v4l2_subdev_format *fmt)
> > > +{
> > > + struct gc05a2 *gc05a2 = to_gc05a2(sd);
> > > + struct v4l2_mbus_framefmt *mbus_fmt;
> > > + struct v4l2_rect *crop;
> > > + const struct gc05a2_mode *mode;
> > > +
> > > + mode = v4l2_find_nearest_size(gc05a2_modes,
> > ARRAY_SIZE(gc05a2_modes),
> > > + width, height, fmt-
> > >format.width,
> > > + fmt->format.height);
> > > +
> > > + /* update crop info to subdev state */
> > > + crop = v4l2_subdev_state_get_crop(state, 0);
> > > + crop->width = mode->width;
> > > + crop->height = mode->height;
> > > +
> > > + /* update fmt info to subdev state */
> > > + gc05a2_update_pad_format(gc05a2, mode, &fmt->format);
> > > + mbus_fmt = v4l2_subdev_state_get_format(state, 0);
> > > + *mbus_fmt = fmt->format;
> > > +
> > > + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> > > + return 0;
> > > + gc05a2->cur_mode = mode;
> > > + gc05a2_update_cur_mode_controls(gc05a2, mode);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_get_selection(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + struct v4l2_subdev_selection *sel)
> > > +{
> > > + switch (sel->target) {
> > > + case V4L2_SEL_TGT_CROP_DEFAULT:
> > > + case V4L2_SEL_TGT_CROP:
> > > + sel->r = *v4l2_subdev_state_get_crop(state, 0);
> > > + break;
> > > + case V4L2_SEL_TGT_CROP_BOUNDS:
> > > + sel->r.top = 0;
> > > + sel->r.left = 0;
> > > + sel->r.width = GC05A2_NATIVE_WIDTH;
> > > + sel->r.height = GC05A2_NATIVE_HEIGHT;
> > > + break;
> > > + default:
> > > + return -EINVAL;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_init_state(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state)
> > > +{
> > > + struct v4l2_subdev_format fmt = {
> > > + .which = V4L2_SUBDEV_FORMAT_TRY,
> > > + .pad = 0,
> > > + .format = {
> > > + .code = GC05A2_MBUS_CODE,
> > > + .width = gc05a2_modes[0].width,
> > > + .height = gc05a2_modes[0].height,
> > > + },
> > > + };
> > > +
> > > + gc05a2_set_format(sd, state, &fmt);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_set_ctrl_hflip(struct gc05a2 *gc05a2, u32
> > ctrl_val)
> > > +{
> > > + int ret;
> > > + u64 val;
> > > +
> > > + ret = cci_read(gc05a2->regmap, GC05A2_FLIP_REG, &val,
> > NULL);
> > > + if (ret) {
> > > + dev_err(gc05a2->dev, "read hflip register failed:
> > %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + return cci_update_bits(gc05a2->regmap, GC05A2_FLIP_REG,
> > > + GC05A2_FLIP_H_MASK,
> > > + ctrl_val ? GC05A2_FLIP_H_MASK : 0,
> > NULL);
> > > +}
> > > +
> > > +static int gc05a2_set_ctrl_vflip(struct gc05a2 *gc05a2, u32
> > ctrl_val)
> > > +{
> > > + int ret;
> > > + u64 val;
> > > +
> > > + ret = cci_read(gc05a2->regmap, GC05A2_FLIP_REG, &val,
> > NULL);
> > > + if (ret) {
> > > + dev_err(gc05a2->dev, "read vflip register failed:
> > %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + return cci_update_bits(gc05a2->regmap, GC05A2_FLIP_REG,
> > > + GC05A2_FLIP_V_MASK,
> > > + ctrl_val ? GC05A2_FLIP_V_MASK : 0,
> > NULL);
> > > +}
> > > +
> > > +static int gc05a2_test_pattern(struct gc05a2 *gc05a2, u32
> > pattern_menu)
> > > +{
> > > + u32 pattern;
> > > + int ret;
> > > +
> > > + if (pattern_menu) {
> > > + switch (pattern_menu) {
> > > + case 1:
> > > + case 2:
> > > + case 3:
> > > + case 4:
> > > + case 5:
> > > + case 6:
> > > + case 7:
> > > + pattern = pattern_menu << 4;
> > > + break;
> > > +
> > > + case 8:
> > > + pattern = 0;
> > > + break;
> > > +
> > > + case 9:
> > > + pattern = 4;
> > > + break;
> > > +
> > > + default:
> > > + pattern = 0x00;
> > > + break;
> > > + }
> >
> > This is fairly terse. Can we add comments, or definitions for the
> > types
> > or such so that the above is easier to interpret?
> >
> > > +
> > > + ret = cci_write(gc05a2->regmap,
> > GC05A2_REG_TEST_PATTERN_IDX,
> > > + pattern, NULL);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + return cci_write(gc05a2->regmap,
> > GC05A2_REG_TEST_PATTERN_EN,
> > > + GC05A2_TEST_PATTERN_EN, NULL);
> > > + } else {
> > > + return cci_write(gc05a2->regmap,
> > GC05A2_REG_TEST_PATTERN_EN,
> > > + 0x00, NULL);
> > > + }
> > > +}
> > > +
> > > +static int gc05a2_set_ctrl(struct v4l2_ctrl *ctrl)
> > > +{
> > > + struct gc05a2 *gc05a2 =
> > > + container_of(ctrl->handler, struct gc05a2, ctrls);
> > > + int ret = 0;
> > > + s64 exposure_max;
> > > + struct v4l2_subdev_state *state;
> > > + const struct v4l2_mbus_framefmt *format;
> > > +
> > > + state = v4l2_subdev_get_locked_active_state(&gc05a2->sd);
> > > + format = v4l2_subdev_state_get_format(state, 0);
> > > +
> > > + if (ctrl->id == V4L2_CID_VBLANK) {
> > > + /* Update max exposure while meeting expected
> > vblanking */
> > > + exposure_max = format->height + ctrl->val -
> > GC05A2_EXP_MARGIN;
> > > + __v4l2_ctrl_modify_range(gc05a2->exposure,
> > > + gc05a2->exposure->minimum,
> > > + exposure_max, gc05a2-
> > >exposure->step,
> > > + exposure_max);
> > > + }
> > > +
> > > + /*
> > > + * Applying V4L2 control value only happens
> > > + * when power is on for streaming.
> > > + */
> > > + if (!pm_runtime_get_if_active(gc05a2->dev))
> > > + return 0;
> > > +
> > > + switch (ctrl->id) {
> > > + case V4L2_CID_EXPOSURE:
> > > + ret = cci_write(gc05a2->regmap, GC05A2_EXP_REG,
> > > + ctrl->val, NULL);
> > > + break;
> > > +
> > > + case V4L2_CID_ANALOGUE_GAIN:
> > > + ret = cci_write(gc05a2->regmap, GC05A2_AGAIN_REG,
> > > + ctrl->val, NULL);
> > > + break;
> > > +
> > > + case V4L2_CID_VBLANK:
> > > + ret = cci_write(gc05a2->regmap,
> > GC05A2_FRAME_LENGTH_REG,
> > > + gc05a2->cur_mode->height + ctrl-
> > >val, NULL);
> > > + break;
> > > +
> > > + case V4L2_CID_HFLIP:
> > > + ret = gc05a2_set_ctrl_hflip(gc05a2, ctrl->val);
> > > + break;
> > > +
> > > + case V4L2_CID_VFLIP:
> > > + ret = gc05a2_set_ctrl_vflip(gc05a2, ctrl->val);
> > > + break;
> > > +
> > > + case V4L2_CID_TEST_PATTERN:
> > > + ret = gc05a2_test_pattern(gc05a2, ctrl->val);
> > > + break;
> > > +
> > > + default:
> > > + break;
> > > + }
> > > +
> > > + pm_runtime_put(gc05a2->dev);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static const struct v4l2_ctrl_ops gc05a2_ctrl_ops = {
> > > + .s_ctrl = gc05a2_set_ctrl,
> > > +};
> > > +
> > > +static int gc05a2_identify_module(struct gc05a2 *gc05a2)
> > > +{
> > > + u64 val;
> > > + int ret;
> > > +
> > > + if (gc05a2->identified)
> > > + return 0;
> > > +
> > > + ret = cci_read(gc05a2->regmap, GC05A2_REG_CHIP_ID, &val,
> > NULL);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + if (val != GC05A2_CHIP_ID) {
> > > + dev_err(gc05a2->dev, "chip id mismatch:
> > 0x%x!=0x%llx",
> > > + GC05A2_CHIP_ID, val);
> > > + return -ENXIO;
> > > + }
> > > +
> > > + gc05a2->identified = true;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int gc05a2_start_streaming(struct gc05a2 *gc05a2)
> > > +{
> > > + const struct gc05a2_mode *mode;
> > > + const struct gc05a2_reg_list *reg_list;
> > > + int ret;
> > > +
> > > + ret = pm_runtime_resume_and_get(gc05a2->dev);
> > > + if (ret < 0)
> > > + return ret;
> > > +
> > > + ret = gc05a2_identify_module(gc05a2);
> > > + if (ret)
> > > + goto err_rpm_put;
> > > +
> > > + ret = cci_multi_reg_write(gc05a2->regmap,
> > > + mode_table_common,
> > > + ARRAY_SIZE(mode_table_common),
> > NULL);
> > > + if (ret)
> > > + goto err_rpm_put;
> > > +
> > > + mode = gc05a2->cur_mode;
> > > + reg_list = &mode->reg_list;
> > > +
> > > + ret = cci_multi_reg_write(gc05a2->regmap,
> > > + reg_list->regs, reg_list-
> > >num_of_regs, NULL);
> > > + if (ret < 0)
> > > + goto err_rpm_put;
> > > +
> > > + ret = __v4l2_ctrl_handler_setup(&gc05a2->ctrls);
> > > + if (ret < 0) {
> > > + dev_err(gc05a2->dev, "could not sync v4l2
> > controls\n");
> > > + goto err_rpm_put;
> > > + }
> > > +
> > > + ret = cci_write(gc05a2->regmap, GC05A2_STREAMING_REG, 1,
> > NULL);
> > > + if (ret < 0) {
> > > + dev_err(gc05a2->dev, "write STREAMING_REG failed:
> > %d\n", ret);
> > > + goto err_rpm_put;
> > > + }
> > > +
> > > + return 0;
> > > +
> > > +err_rpm_put:
> > > + pm_runtime_put(gc05a2->dev);
> > > + return ret;
> > > +}
> > > +
> > > +static int gc05a2_stop_streaming(struct gc05a2 *gc05a2)
> > > +{
> > > + int ret;
> > > +
> > > + ret = cci_write(gc05a2->regmap, GC05A2_STREAMING_REG, 0,
> > NULL);
> > > + if (ret < 0)
> > > + dev_err(gc05a2->dev, "could not sent stop streaming
> > %d\n", ret);
> > > +
> > > + pm_runtime_put(gc05a2->dev);
> > > + return ret;
> > > +}
> > > +
> > > +static int gc05a2_s_stream(struct v4l2_subdev *subdev, int enable)
> > > +{
> > > + struct gc05a2 *gc05a2 = to_gc05a2(subdev);
> > > + struct v4l2_subdev_state *state;
> > > + int ret;
> > > +
> > > + state = v4l2_subdev_lock_and_get_active_state(subdev);
> > > +
> > > + if (enable)
> > > + ret = gc05a2_start_streaming(gc05a2);
> > > + else
> > > + ret = gc05a2_stop_streaming(gc05a2);
> > > +
> > > + v4l2_subdev_unlock_state(state);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static const struct v4l2_subdev_video_ops gc05a2_video_ops = {
> > > + .s_stream = gc05a2_s_stream,
> > > +};
> > > +
> > > +static const struct v4l2_subdev_pad_ops gc05a2_subdev_pad_ops = {
> > > + .enum_mbus_code = gc05a2_enum_mbus_code,
> > > + .enum_frame_size = gc05a2_enum_frame_size,
> > > + .get_fmt = v4l2_subdev_get_fmt,
> > > + .set_fmt = gc05a2_set_format,
> > > + .get_selection = gc05a2_get_selection,
> > > +};
> > > +
> > > +static const struct v4l2_subdev_core_ops gc05a2_core_ops = {
> > > + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> > > + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> > > +};
> > > +
> > > +static const struct v4l2_subdev_ops gc05a2_subdev_ops = {
> > > + .core = &gc05a2_core_ops,
> > > + .video = &gc05a2_video_ops,
> > > + .pad = &gc05a2_subdev_pad_ops,
> > > +};
> > > +
> > > +static const struct v4l2_subdev_internal_ops gc05a2_internal_ops =
> > {
> > > + .init_state = gc05a2_init_state,
> > > +};
> > > +
> > > +static int gc05a2_get_regulators(struct device *dev, struct gc05a2
> > *gc05a2)
> > > +{
> > > + unsigned int i;
> > > +
> > > + for (i = 0; i < ARRAY_SIZE(gc05a2_supply_name); i++)
> > > + gc05a2->supplies[i].supply = gc05a2_supply_name[i];
> > > +
> > > + return devm_regulator_bulk_get(dev,
> > ARRAY_SIZE(gc05a2_supply_name),
> > > + gc05a2->supplies);
> > > +}
> > > +
> > > +static int gc05a2_parse_fwnode(struct gc05a2 *gc05a2)
> > > +{
> > > + struct fwnode_handle *endpoint;
> > > + struct v4l2_fwnode_endpoint bus_cfg = {
> > > + .bus_type = V4L2_MBUS_CSI2_DPHY,
> > > + };
> > > + int ret;
> > > + struct device *dev = gc05a2->dev;
> > > +
> > > + endpoint =
> > > + fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0,
> > 0,
> > >
> > + FWNODE_GRAPH_ENDPOINT
> > _NEXT);
> > > + if (!endpoint) {
> > > + dev_err(dev, "endpoint node not found\n");
> > > + return -EINVAL;
> > > + }
> > > +
> > > + ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
> > > + if (ret) {
> > > + dev_err(dev, "parsing endpoint node failed\n");
> > > + goto done;
> > > + }
> > > +
> > > + ret = v4l2_link_freq_to_bitmap(dev,
> > bus_cfg.link_frequencies,
> > >
> > + bus_cfg.nr_of_link_frequencies
> > ,
> > > + gc05a2_link_freq_menu_items,
> > >
> > + ARRAY_SIZE(gc05a2_link_freq_me
> > nu_items),
> > > + &gc05a2->link_freq_bitmap);
> > > + if (ret)
> > > + goto done;
> > > +
> > > +done:
> > > + v4l2_fwnode_endpoint_free(&bus_cfg);
> > > + fwnode_handle_put(endpoint);
> > > + return ret;
> > > +}
> > > +
> > > +static u64 gc05a2_to_pixel_rate(u32 f_index)
> > > +{
> > > + u64 pixel_rate =
> > > + gc05a2_link_freq_menu_items[f_index] * 2 *
> > GC05A2_DATA_LANES;
> > > +
> > > + return div_u64(pixel_rate, GC05A2_RGB_DEPTH);
> > > +}
> > > +
> > > +static int gc05a2_init_controls(struct gc05a2 *gc05a2)
> > > +{
> > > + struct i2c_client *client = v4l2_get_subdevdata(&gc05a2-
> > >sd);
> > > + const struct gc05a2_mode *mode = &gc05a2_modes[0];
> > > + const struct v4l2_ctrl_ops *ops = &gc05a2_ctrl_ops;
> > > + struct v4l2_fwnode_device_properties props;
> > > + struct v4l2_ctrl_handler *ctrl_hdlr;
> > > + s64 exposure_max, h_blank;
> > > + int ret;
> > > +
> > > + ctrl_hdlr = &gc05a2->ctrls;
> > > + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 9);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + gc05a2->hflip = v4l2_ctrl_new_std(ctrl_hdlr,
> > &gc05a2_ctrl_ops,
> > > + V4L2_CID_HFLIP, 0, 1, 1,
> > 0);
> > > + gc05a2->vflip = v4l2_ctrl_new_std(ctrl_hdlr,
> > &gc05a2_ctrl_ops,
> > > + V4L2_CID_VFLIP, 0, 1, 1,
> > 0);
> > > + v4l2_ctrl_cluster(2, &gc05a2->hflip);
> > > +
> > > + gc05a2->link_freq =
> > > + v4l2_ctrl_new_int_menu(ctrl_hdlr,
> > > + &gc05a2_ctrl_ops,
> > > + V4L2_CID_LINK_FREQ,
> > >
> > + ARRAY_SIZE(gc05a2_link_freq_menu_items
> > ) - 1,
> > > + 0,
> > > + gc05a2_link_freq_menu_items);
> > > + if (gc05a2->link_freq)
> > > + gc05a2->link_freq->flags |=
> > V4L2_CTRL_FLAG_READ_ONLY;
> > > +
> > > + gc05a2->pixel_rate =
> > > + v4l2_ctrl_new_std(ctrl_hdlr,
> > > + &gc05a2_ctrl_ops,
> > > + V4L2_CID_PIXEL_RATE, 0,
> > > + gc05a2_to_pixel_rate(0),
> > > + 1,
> > > + gc05a2_to_pixel_rate(0));
> > > +
> > > + gc05a2->vblank =
> > > + v4l2_ctrl_new_std(ctrl_hdlr,
> > > + &gc05a2_ctrl_ops,
> > V4L2_CID_VBLANK,
> > > + mode->vts_min - mode->height,
> > > + GC05A2_VTS_MAX - mode->height, 1,
> > > + mode->vts_def - mode->height);
> > > +
> > > + h_blank = mode->hts - mode->width;
> > > + gc05a2->hblank = v4l2_ctrl_new_std(ctrl_hdlr,
> > &gc05a2_ctrl_ops,
> > > + V4L2_CID_HBLANK,
> > h_blank, h_blank, 1,
> > > + h_blank);
> > > + if (gc05a2->hblank)
> > > + gc05a2->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > > +
> > > + v4l2_ctrl_new_std(ctrl_hdlr, &gc05a2_ctrl_ops,
> > > + V4L2_CID_ANALOGUE_GAIN, GC05A2_AGAIN_MIN,
> > > + GC05A2_AGAIN_MAX, GC05A2_AGAIN_STEP,
> > > + GC05A2_AGAIN_MIN);
> > > +
> > > + exposure_max = mode->vts_def - GC05A2_EXP_MARGIN;
> > > + gc05a2->exposure = v4l2_ctrl_new_std(ctrl_hdlr,
> > &gc05a2_ctrl_ops,
> > > + V4L2_CID_EXPOSURE,
> > GC05A2_EXP_MIN,
> > > + exposure_max,
> > GC05A2_EXP_STEP,
> > > + exposure_max);
> > > +
> > > + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &gc05a2_ctrl_ops,
> > > + V4L2_CID_TEST_PATTERN,
> > >
> > + ARRAY_SIZE(gc05a2_test_pattern_m
> > enu) - 1,
> > > + 0, 0,
> > gc05a2_test_pattern_menu);
> > > +
> > > + /* register properties to fwnode (e.g. rotation,
> > orientation) */
> > > + ret = v4l2_fwnode_device_parse(&client->dev, &props);
> > > + if (ret)
> > > + goto error_ctrls;
> > > +
> > > + ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, ops,
> > &props);
> > > + if (ret)
> > > + goto error_ctrls;
> > > +
> > > + if (ctrl_hdlr->error) {
> > > + ret = ctrl_hdlr->error;
> > > + goto error_ctrls;
> > > + }
> > > +
> > > + gc05a2->sd.ctrl_handler = ctrl_hdlr;
> > > +
> > > + return 0;
> > > +
> > > +error_ctrls:
> > > + v4l2_ctrl_handler_free(ctrl_hdlr);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int gc05a2_probe(struct i2c_client *client)
> > > +{
> > > + struct device *dev = &client->dev;
> > > + struct gc05a2 *gc05a2;
> > > + int ret;
> > > +
> > > + gc05a2 = devm_kzalloc(dev, sizeof(*gc05a2), GFP_KERNEL);
> > > + if (!gc05a2)
> > > + return -ENOMEM;
> > > +
> > > + gc05a2->dev = dev;
> > > +
> > > + ret = gc05a2_parse_fwnode(gc05a2);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + gc05a2->regmap = devm_cci_regmap_init_i2c(client, 16);
> > > + if (IS_ERR(gc05a2->regmap))
> > > + return dev_err_probe(dev, PTR_ERR(gc05a2->regmap),
> > > + "failed to init CCI\n");
> > > +
> > > + gc05a2->xclk = devm_clk_get(dev, NULL);
> > > + if (IS_ERR(gc05a2->xclk))
> > > + return dev_err_probe(dev, PTR_ERR(gc05a2->xclk),
> > > + "failed to get xclk\n");
> > > +
> > > + ret = clk_set_rate(gc05a2->xclk, GC05A2_DEFAULT_CLK_FREQ);
> > > + if (ret)
> > > + return dev_err_probe(dev, ret,
> > > + "failed to set xclk
> > frequency\n");
> > > +
> > > + ret = gc05a2_get_regulators(dev, gc05a2);
> > > + if (ret < 0)
> > > + return dev_err_probe(dev, ret,
> > > + "failed to get regulators\n");
> > > +
> > > + gc05a2->reset_gpio = devm_gpiod_get(dev, "reset",
> > GPIOD_OUT_LOW);
> > > + if (IS_ERR(gc05a2->reset_gpio))
> > > + return dev_err_probe(dev, PTR_ERR(gc05a2-
> > >reset_gpio),
> > > + "failed to get gpio\n");
> > > +
> > > + v4l2_i2c_subdev_init(&gc05a2->sd, client,
> > &gc05a2_subdev_ops);
> > > + gc05a2->sd.internal_ops = &gc05a2_internal_ops;
> > > + gc05a2->cur_mode = &gc05a2_modes[0];
> > > +
> > > + ret = gc05a2_init_controls(gc05a2);
> > > + if (ret)
> > > + return dev_err_probe(dev, ret,
> > > + "failed to init controls\n");
> > > +
> > > + gc05a2->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> > > + V4L2_SUBDEV_FL_HAS_EVENTS;
> > > + gc05a2->pad.flags = MEDIA_PAD_FL_SOURCE;
> > > + gc05a2->sd.dev = &client->dev;
> > > + gc05a2->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> > > +
> > > + ret = media_entity_pads_init(&gc05a2->sd.entity, 1,
> > &gc05a2->pad);
> > > + if (ret < 0) {
> > > + dev_err(dev, "could not register media entity\n");
> > > + goto err_v4l2_ctrl_handler_free;
> > > + }
> > > +
> > > + gc05a2->sd.state_lock = gc05a2->ctrls.lock;
> > > + ret = v4l2_subdev_init_finalize(&gc05a2->sd);
> > > + if (ret < 0) {
> > > + dev_err(dev, "v4l2 subdev init error: %d\n", ret);
> > > + goto err_media_entity_cleanup;
> > > + }
> > > +
> > > + pm_runtime_set_active(gc05a2->dev);
> > > + pm_runtime_enable(gc05a2->dev);
> > > + pm_runtime_set_autosuspend_delay(gc05a2->dev, 1000);
> > > + pm_runtime_use_autosuspend(gc05a2->dev);
> > > + pm_runtime_idle(gc05a2->dev);
> > > +
> > > + ret = v4l2_async_register_subdev_sensor(&gc05a2->sd);
> > > + if (ret < 0) {
> > > + dev_err(dev, "could not register v4l2 device\n");
> > > + goto err_rpm;
> > > + }
> > > +
> > > + return 0;
> > > +
> > > +err_rpm:
> > > + pm_runtime_disable(gc05a2->dev);
> > > + v4l2_subdev_cleanup(&gc05a2->sd);
> > > +
> > > +err_media_entity_cleanup:
> > > + media_entity_cleanup(&gc05a2->sd.entity);
> > > +
> > > +err_v4l2_ctrl_handler_free:
> > > + v4l2_ctrl_handler_free(&gc05a2->ctrls);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void gc05a2_remove(struct i2c_client *client)
> > > +{
> > > + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > > + struct gc05a2 *gc05a2 = to_gc05a2(sd);
> > > +
> > > + v4l2_async_unregister_subdev(&gc05a2->sd);
> > > + v4l2_subdev_cleanup(sd);
> > > + media_entity_cleanup(&gc05a2->sd.entity);
> > > + v4l2_ctrl_handler_free(&gc05a2->ctrls);
> > > +
> > > + pm_runtime_disable(&client->dev);
> > > + if (!pm_runtime_status_suspended(&client->dev))
> > > + gc05a2_power_off(gc05a2->dev);
> > > + pm_runtime_set_suspended(&client->dev);
> > > +}
> > > +
> > > +static const struct of_device_id gc05a2_of_match[] = {
> > > + { .compatible = "galaxycore,gc05a2" },
> > > + {}
> > > +};
> > > +MODULE_DEVICE_TABLE(of, gc05a2_of_match);
> > > +
> > > +static DEFINE_RUNTIME_DEV_PM_OPS(gc05a2_pm_ops,
> > > + gc05a2_power_off,
> > > + gc05a2_power_on,
> > > + NULL);
> > > +
> > > +static struct i2c_driver gc05a2_i2c_driver = {
> > > + .driver = {
> > > + .of_match_table = gc05a2_of_match,
> > > + .pm = pm_ptr(&gc05a2_pm_ops),
> > > + .name = "gc05a2",
> > > + },
> > > + .probe = gc05a2_probe,
> > > + .remove = gc05a2_remove,
> > > +};
> > > +module_i2c_driver(gc05a2_i2c_driver);
> > > +
> > > +MODULE_DESCRIPTION("GalaxyCore gc05a2 Camera driver");
> > > +MODULE_AUTHOR("Zhi Mao <zhi.mao@xxxxxxxxxxxx>");
> > > +MODULE_LICENSE("GPL");
> > > --
> > > 2.25.1
> > >

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