Re: [RFC PATCH v4 6/8] media: tegra: Add Tegra210 Video input driver

From: Sowjanya Komatineni
Date: Wed Mar 18 2020 - 12:17:07 EST

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In reply to: Hans Verkuil: "Re: [RFC PATCH v4 6/8] media: tegra: Add Tegra210 Video input driver"
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OK, sure. Thanks Hans

On 3/18/20 5:21 AM, Hans Verkuil wrote:

External email: Use caution opening links or attachments

Hi Sowjanya,

Some small comments below.

Checkpatch is happy with this series, smatch/sparse are happy, and v4l2-compliance
is happy. My comments here are all cosmetic, so I suggest that you wait a few more
days to see if anyone else has comments, and then post a v5 early next week. It's
likely I'll then make a pull request for that v5, but it will probably be too late
to be included in 5.7.

On 3/15/20 2:46 AM, Sowjanya Komatineni wrote:

Tegra210 contains a powerful Video Input (VI) hardware controller
which can support up to 6 MIPI CSI camera sensors.

Each Tegra CSI port can be one-to-one mapped to VI channel and can
capture from an external camera sensor connected to CSI or from
built-in test pattern generator.

Tegra210 supports built-in test pattern generator from CSI to VI.

This patch adds a V4L2 media controller and capture driver support
for Tegra210 built-in CSI to VI test pattern generator.

Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx>
---
drivers/staging/media/Kconfig | 2 +
drivers/staging/media/Makefile | 1 +
drivers/staging/media/tegra/Kconfig | 10 +
drivers/staging/media/tegra/Makefile | 8 +
drivers/staging/media/tegra/TODO | 10 +
drivers/staging/media/tegra/tegra-common.h | 263 +++++++
drivers/staging/media/tegra/tegra-csi.c | 533 ++++++++++++++
drivers/staging/media/tegra/tegra-csi.h | 118 ++++
drivers/staging/media/tegra/tegra-vi.c | 1060 ++++++++++++++++++++++++++++
drivers/staging/media/tegra/tegra-vi.h | 83 +++
drivers/staging/media/tegra/tegra-video.c | 129 ++++
drivers/staging/media/tegra/tegra-video.h | 32 +
drivers/staging/media/tegra/tegra210.c | 754 ++++++++++++++++++++
drivers/staging/media/tegra/tegra210.h | 192 +++++
14 files changed, 3195 insertions(+)
create mode 100644 drivers/staging/media/tegra/Kconfig
create mode 100644 drivers/staging/media/tegra/Makefile
create mode 100644 drivers/staging/media/tegra/TODO
create mode 100644 drivers/staging/media/tegra/tegra-common.h
create mode 100644 drivers/staging/media/tegra/tegra-csi.c
create mode 100644 drivers/staging/media/tegra/tegra-csi.h
create mode 100644 drivers/staging/media/tegra/tegra-vi.c
create mode 100644 drivers/staging/media/tegra/tegra-vi.h
create mode 100644 drivers/staging/media/tegra/tegra-video.c
create mode 100644 drivers/staging/media/tegra/tegra-video.h
create mode 100644 drivers/staging/media/tegra/tegra210.c
create mode 100644 drivers/staging/media/tegra/tegra210.h

diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig
index e59a846..093a1a8 100644
--- a/drivers/staging/media/Kconfig
+++ b/drivers/staging/media/Kconfig
@@ -32,6 +32,8 @@ source "drivers/staging/media/omap4iss/Kconfig"

source "drivers/staging/media/sunxi/Kconfig"

+source "drivers/staging/media/tegra/Kconfig"
+
source "drivers/staging/media/tegra-vde/Kconfig"

source "drivers/staging/media/ipu3/Kconfig"
diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile
index 23c6824..586a590 100644
--- a/drivers/staging/media/Makefile
+++ b/drivers/staging/media/Makefile
@@ -4,6 +4,7 @@ obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx/
obj-$(CONFIG_VIDEO_MESON_VDEC) += meson/vdec/
obj-$(CONFIG_VIDEO_OMAP4) += omap4iss/
obj-$(CONFIG_VIDEO_SUNXI) += sunxi/
+obj-$(CONFIG_VIDEO_TEGRA) += tegra/
obj-$(CONFIG_TEGRA_VDE) += tegra-vde/
obj-$(CONFIG_VIDEO_HANTRO) += hantro/
obj-$(CONFIG_VIDEO_IPU3_IMGU) += ipu3/
diff --git a/drivers/staging/media/tegra/Kconfig b/drivers/staging/media/tegra/Kconfig
new file mode 100644
index 0000000..8bead1c
--- /dev/null
+++ b/drivers/staging/media/tegra/Kconfig
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config VIDEO_TEGRA
+ tristate "NVIDIA Tegra VI driver"
+ depends on ARCH_TEGRA || (ARM && COMPILE_TEST)
+ depends on VIDEO_V4L2
+ depends on MEDIA_CONTROLLER
+ select TEGRA_HOST1X
+ select VIDEOBUF2_DMA_CONTIG
+ help
+ Say yes here to enable support for Tegra video input hardware
diff --git a/drivers/staging/media/tegra/Makefile b/drivers/staging/media/tegra/Makefile
new file mode 100644
index 0000000..488c6ef
--- /dev/null
+++ b/drivers/staging/media/tegra/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+tegra-video-y := \
+ tegra-video.o \
+ tegra-vi.o \
+ tegra-csi.o \
+ tegra210.o
+
+obj-$(CONFIG_VIDEO_TEGRA) += tegra-video.o
diff --git a/drivers/staging/media/tegra/TODO b/drivers/staging/media/tegra/TODO
new file mode 100644
index 0000000..d7d64b1
--- /dev/null
+++ b/drivers/staging/media/tegra/TODO
@@ -0,0 +1,10 @@
+TODO list
+* Currently driver supports Tegra build-in TPG Only with direct media links from CSI to VI.
+ Update the driver to do TPG Vs Sensor media links based on the kernel config CONFIG_VIDEO_TEGRA_TPG.
+* Add real camera sensor capture support
+* Add RAW10 packed video format support to Tegra210 video formats
+* Add Tegra CSI MIPI pads calibration
+* Add MIPI clock Settle time computation based on the data rate
+* Add support for Ganged mode
+* Make sure v4l2-compliance tests pass with all of the above implementations.
+* Add SMMU support for VI to avoid cma_alloc failures with higher resolutions of some video formats.
diff --git a/drivers/staging/media/tegra/tegra-common.h b/drivers/staging/media/tegra/tegra-common.h
new file mode 100644
index 0000000..e077e9a
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-common.h
@@ -0,0 +1,263 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#ifndef __TEGRA_COMMON_H__
+#define __TEGRA_COMMON_H__
+
+#include <linux/host1x.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "tegra-vi.h"
+#include "tegra-csi.h"
+
+#define TEGRA_MIN_WIDTH 32U
+#define TEGRA_MAX_WIDTH 32768U
+#define TEGRA_MIN_HEIGHT 32U
+#define TEGRA_MAX_HEIGHT 32768U
+
+#define TEGRA_DEF_WIDTH 1920
+#define TEGRA_DEF_HEIGHT 1080
+#define TEGRA_IMAGE_FORMAT_DEF 32
+
+#define MAX_FORMAT_NUM 64
+
+/*
+ * VI channel input data type enum.
+ * These data type enum value gets programmed into corresponding Tegra VI
+ * channel register bits.
+ */
+enum tegra_image_dt {
+ TEGRA_IMAGE_DT_YUV420_8 = 24,
+ TEGRA_IMAGE_DT_YUV420_10,
+
+ TEGRA_IMAGE_DT_YUV420CSPS_8 = 28,
+ TEGRA_IMAGE_DT_YUV420CSPS_10,
+ TEGRA_IMAGE_DT_YUV422_8,
+ TEGRA_IMAGE_DT_YUV422_10,
+ TEGRA_IMAGE_DT_RGB444,
+ TEGRA_IMAGE_DT_RGB555,
+ TEGRA_IMAGE_DT_RGB565,
+ TEGRA_IMAGE_DT_RGB666,
+ TEGRA_IMAGE_DT_RGB888,
+
+ TEGRA_IMAGE_DT_RAW6 = 40,
+ TEGRA_IMAGE_DT_RAW7,
+ TEGRA_IMAGE_DT_RAW8,
+ TEGRA_IMAGE_DT_RAW10,
+ TEGRA_IMAGE_DT_RAW12,
+ TEGRA_IMAGE_DT_RAW14,
+};
+
+/*
+ * Pixel memory format enum for Tegra VI channel.
+ * These format enum value gets programmed into corresponding Tegra VI
+ * channel register bits.
+ */
+enum tegra_image_format {
+ TEGRA_IMAGE_FORMAT_T_L8 = 16,
+
+ TEGRA_IMAGE_FORMAT_T_R16_I = 32,
+ TEGRA_IMAGE_FORMAT_T_B5G6R5,
+ TEGRA_IMAGE_FORMAT_T_R5G6B5,
+ TEGRA_IMAGE_FORMAT_T_A1B5G5R5,
+ TEGRA_IMAGE_FORMAT_T_A1R5G5B5,
+ TEGRA_IMAGE_FORMAT_T_B5G5R5A1,
+ TEGRA_IMAGE_FORMAT_T_R5G5B5A1,
+ TEGRA_IMAGE_FORMAT_T_A4B4G4R4,
+ TEGRA_IMAGE_FORMAT_T_A4R4G4B4,
+ TEGRA_IMAGE_FORMAT_T_B4G4R4A4,
+ TEGRA_IMAGE_FORMAT_T_R4G4B4A4,
+
+ TEGRA_IMAGE_FORMAT_T_A8B8G8R8 = 64,
+ TEGRA_IMAGE_FORMAT_T_A8R8G8B8,
+ TEGRA_IMAGE_FORMAT_T_B8G8R8A8,
+ TEGRA_IMAGE_FORMAT_T_R8G8B8A8,
+ TEGRA_IMAGE_FORMAT_T_A2B10G10R10,
+ TEGRA_IMAGE_FORMAT_T_A2R10G10B10,
+ TEGRA_IMAGE_FORMAT_T_B10G10R10A2,
+ TEGRA_IMAGE_FORMAT_T_R10G10B10A2,
+
+ TEGRA_IMAGE_FORMAT_T_A8Y8U8V8 = 193,
+ TEGRA_IMAGE_FORMAT_T_V8U8Y8A8,
+
+ TEGRA_IMAGE_FORMAT_T_A2Y10U10V10 = 197,
+ TEGRA_IMAGE_FORMAT_T_V10U10Y10A2,
+ TEGRA_IMAGE_FORMAT_T_Y8_U8__Y8_V8,
+ TEGRA_IMAGE_FORMAT_T_Y8_V8__Y8_U8,
+ TEGRA_IMAGE_FORMAT_T_U8_Y8__V8_Y8,
+ TEGRA_IMAGE_FORMAT_T_V8_Y8__U8_Y8,
+
+ TEGRA_IMAGE_FORMAT_T_Y8__U8__V8_N444 = 224,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8V8_N444,
+ TEGRA_IMAGE_FORMAT_T_Y8__V8U8_N444,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8__V8_N422,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8V8_N422,
+ TEGRA_IMAGE_FORMAT_T_Y8__V8U8_N422,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8__V8_N420,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8V8_N420,
+ TEGRA_IMAGE_FORMAT_T_Y8__V8U8_N420,
+ TEGRA_IMAGE_FORMAT_T_X2LC10LB10LA10,
+ TEGRA_IMAGE_FORMAT_T_A2R6R6R6R6R6,
+};
+
+/**
+ * struct tegra_video_format - Tegra video format description
+ * @img_dt: image data type
+ * @bit_width: format width in bits per component
+ * @code: media bus format code
+ * @bpp: bytes per pixel (when stored in memory)
+ * @img_fmt: image format
+ * @fourcc: V4L2 pixel format FCC identifier
+ */
+struct tegra_video_format {
+ enum tegra_image_dt img_dt;
+ unsigned int bit_width;
+ unsigned int code;
+ unsigned int bpp;
+ u32 img_fmt;
+ u32 fourcc;
+};
+
+#define TEGRA_VIDEO_FORMAT(DATA_TYPE, BIT_WIDTH, MBUS_CODE, BPP, \

The formatting looks a bit weird, I think the TAB after 'define' should be a space
instead.

+ FORMAT, FOURCC) \
+{ \
+ TEGRA_IMAGE_DT_##DATA_TYPE, \
+ BIT_WIDTH, \
+ MEDIA_BUS_FMT_##MBUS_CODE, \
+ BPP, \
+ TEGRA_IMAGE_FORMAT_##FORMAT, \
+ V4L2_PIX_FMT_##FOURCC, \
+}
+
+enum tegra_vi_pg_mode {
+ TEGRA_VI_PG_DISABLED = 0,
+ TEGRA_VI_PG_DIRECT,
+ TEGRA_VI_PG_PATCH,
+};
+
+/**
+ * struct tegra_vi_channel - Tegra video channel
+ *
+ * @list: list head for this entry
+ * @video: V4L2 video device associated with the video channel
+ * @video_lock: protects the @format and @queue fields
+ * @pad: media pad for the video device entity
+ *
+ * @vi: Tegra video input device structure
+ * @frame_start_sp: host1x syncpoint pointer to synchronize programmed capture
+ * start condition with hardware frame start events through host1x
+ * syncpoint counters.
+ * @mw_ack_sp: host1x syncpoint pointer to synchronize programmed memory write
+ * ack trigger condition with hardware memory write done at end of
+ * frame through host1x syncpoint counters.
+ * @capture_reqs: capture requests initiated.
+ * @sp_incr_lock: protects cpu syncpoint increment.
+ *
+ * @kthread_start_capture: kthread to start capture of single frame when
+ * vb buffer is available. This thread programs VI CSI hardware
+ * for single frame capture and waits for frame start event from
+ * the hardware. On receiving frame start event, it wakes up
+ * kthread_finish_capture thread to wait for finishing frame data
+ * write to the memory. Incase of missing frame start event, this

Incase -> In case

+ * thread returns buffer back to vb with VB2_BUF_STATE_ERROR.
+ * @start_wait: waitqueue for starting frame capture when buffer is available.
+ * @kthread_finish_capture: kthread to finish the buffer capture and return to.
+ * This thread is woken up by kthread_start_capture on receiving
+ * frame start event from the hardware and this thread waits for
+ * MW_ACK_DONE event which indicates completion of writing frame
+ * data to the memory. On receiving MW_ACK_DONE event, buffer is
+ * returned back to vb with VB2_BUF_STATE_DONE and incase of

incase -> in case

+ * missing MW_ACK_DONE event, buffer is returned back to vb with
+ * VB2_BUF_STATE_ERROR.
+ * @done_wait: waitqueue for finishing capture data writes to memory.
+ *
+ * @format: active V4L2 pixel format
+ * @fmtinfo: format information corresponding to the active @format
+ * @queue: vb2 buffers queue
+ * @sequence: V4L2 buffers sequence number
+ *
+ * @capture: list of queued buffers for capture
+ * @start_lock: protects the capture queued list
+ * @done: list of capture done queued buffers
+ * @done_lock: protects the capture done queue list
+ *
+ * @portno: VI channel port number
+ *
+ * @ctrl_handler: V4L2 control handler of this video channel
+ * @tpg_fmts_bitmap: a bitmap for supported TPG formats
+ * @pg_mode: test pattern generator mode (disabled/direct/patch)
+ */
+struct tegra_vi_channel {
+ struct list_head list;
+ struct video_device *video;
+ /* protects the @format and @queue fields */
+ struct mutex video_lock;
+ struct media_pad pad;
+
+ struct tegra_vi *vi;
+ struct host1x_syncpt *frame_start_sp;
+ struct host1x_syncpt *mw_ack_sp;
+ int capture_reqs;
+ /* protects the cpu syncpoint increment */
+ spinlock_t sp_incr_lock;
+
+ struct task_struct *kthread_start_capture;
+ wait_queue_head_t start_wait;
+ struct task_struct *kthread_finish_capture;
+ wait_queue_head_t done_wait;
+
+ struct v4l2_pix_format format;
+ const struct tegra_video_format *fmtinfo;
+ struct vb2_queue queue;
+ u32 sequence;
+
+ struct list_head capture;
+ /* protects the capture queued list */
+ spinlock_t start_lock;
+ struct list_head done;
+ /* protects the capture done queue list */
+ spinlock_t done_lock;
+
+ unsigned char portno;
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ DECLARE_BITMAP(tpg_fmts_bitmap, MAX_FORMAT_NUM);
+ enum tegra_vi_pg_mode pg_mode;
+};
+
+/**
+ * struct tegra_channel_buffer - video channel buffer
+ * @buf: vb2 buffer base object
+ * @queue: buffer list entry in the channel queued buffers list
+ * @chan: channel that uses the buffer
+ * @addr: Tegra IOVA buffer address for VI output
+ * @mw_ack_sp_thresh: MW_ACK_DONE syncpoint threshold corresponding
+ * to the capture buffer.
+ */
+struct tegra_channel_buffer {
+ struct vb2_v4l2_buffer buf;
+ struct list_head queue;
+ struct tegra_vi_channel *chan;
+ dma_addr_t addr;
+ u32 mw_ack_sp_thresh;
+};
+
+int tegra_channel_setup_ctrl_handler(struct tegra_vi_channel *chan);
+int tegra_channel_set_stream(struct tegra_vi_channel *chan, bool on);
+void tegra_channel_release_buffers(struct tegra_vi_channel *chan,
+ enum vb2_buffer_state state);
+int tegra_channel_csi_error_recover(struct tegra_vi_channel *chan);
+
+#endif
diff --git a/drivers/staging/media/tegra/tegra-csi.c b/drivers/staging/media/tegra/tegra-csi.c
new file mode 100644
index 0000000..8286d83
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-csi.c
@@ -0,0 +1,533 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk/tegra.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/host1x.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include "tegra-video.h"
+#include "tegra-common.h"
+#include "tegra-csi.h"
+
+#define TEGRA210_TPG_CLOCK 594000000

TAB after 'define' should be space.

+
+static inline struct tegra_csi *
+host1x_client_to_csi(struct host1x_client *client)
+{
+ return container_of(client, struct tegra_csi, client);
+}
+
+static inline struct tegra_csi_channel *to_csi_chan(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct tegra_csi_channel, subdev);
+}
+
+/*
+ * Only use this subdevice media bus ops for test pattern generator,
+ * because CSI device is an separated subdevice which has 6 source
+ * pads to generate test pattern.
+ */
+static struct v4l2_mbus_framefmt tegra_csi_tpg_fmts[] = {

Can this be const?

+ {
+ TEGRA_DEF_WIDTH,
+ TEGRA_DEF_HEIGHT,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ V4L2_FIELD_NONE,
+ V4L2_COLORSPACE_SRGB
+ },
+ {
+ TEGRA_DEF_WIDTH,
+ TEGRA_DEF_HEIGHT,
+ MEDIA_BUS_FMT_RGB888_1X32_PADHI,
+ V4L2_FIELD_NONE,
+ V4L2_COLORSPACE_SRGB
+ }
+
+};
+
+static struct v4l2_frmsize_discrete tegra_csi_tpg_sizes[] = {

const?

+ { 1280, 720 },
+ { 1920, 1080 },
+ { 3840, 2160 },
+};
+
+/*
+ * V4L2 Subdevice Video Operations
+ */
+static int tegra_csi_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+ struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+ struct tegra_csi *csi = csi_chan->csi;
+ struct tegra_vi_channel *chan = subdev->host_priv;
+
+ return csi->ops->csi_streaming(csi_chan, chan->pg_mode, enable);
+}
+
+/*
+ * V4L2 Subdevice Pad Operations
+ */
+
+static int tegra_csi_enum_bus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(tegra_csi_tpg_fmts))
+ return -EINVAL;
+
+ code->code = tegra_csi_tpg_fmts[code->index].code;
+ return 0;
+}
+
+static int tegra_csi_get_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+
+ fmt->format = csi_chan->format;
+ return 0;
+}
+
+static void tegra_csi_try_mbus_fmt(struct v4l2_subdev *subdev,
+ struct v4l2_mbus_framefmt *mfmt)
+{
+ struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+ struct tegra_csi *csi = csi_chan->csi;
+ const struct v4l2_frmsize_discrete *sizes;
+ unsigned int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(tegra_csi_tpg_fmts); i++) {
+ struct v4l2_mbus_framefmt *mbus_fmt = &tegra_csi_tpg_fmts[i];

mbus_fmt can be a const pointer.

+
+ if (mfmt->code == mbus_fmt->code) {

I prefer:

if (mfmt->code != mbus_fmt->code)
continue;

and then the for-loop can be one indent to the left.

+ for (j = 0; j < ARRAY_SIZE(tegra_csi_tpg_sizes); j++) {
+ sizes = &tegra_csi_tpg_sizes[j];
+ if (mfmt->width == sizes->width &&
+ mfmt->height == sizes->height) {
+ return;
+ }
+ }
+ }
+ }
+
+ dev_dbg(csi->dev, "using Tegra default format SRGGB10 1920x1080\n");
+ *mfmt = tegra_csi_tpg_fmts[0];
+}
+
+static int tegra_csi_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+ struct v4l2_mbus_framefmt *format = &fmt->format;
+
+ tegra_csi_try_mbus_fmt(subdev, format);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ return 0;
+
+ csi_chan->format = *format;
+ return 0;
+}
+
+/*
+ * V4L2 Subdevice Operations
+ */
+static struct v4l2_subdev_video_ops tegra_csi_video_ops = {
+ .s_stream = tegra_csi_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops tegra_csi_pad_ops = {
+ .enum_mbus_code = tegra_csi_enum_bus_code,
+ .get_fmt = tegra_csi_get_format,
+ .set_fmt = tegra_csi_set_format,
+ .link_validate = v4l2_subdev_link_validate_default,

You shouldn't need link_validate for this non-MC driver.
If the link validation would fail, then that means that this driver
is selecting wrong mbus formats, and is therefore a driver bug.

+};
+
+static struct v4l2_subdev_ops tegra_csi_ops = {
+ .video = &tegra_csi_video_ops,
+ .pad = &tegra_csi_pad_ops,
+};
+
+static int tegra_csi_tpg_channels_alloc(struct tegra_csi *csi)
+{
+ struct device_node *node = csi->dev->of_node;
+ unsigned int port_num;
+ struct tegra_csi_channel *item;
+ unsigned int tpg_channels = csi->soc->csi_max_channels;
+
+ /* allocate CSI channel for each CSI x2 ports */
+ for (port_num = 0; port_num < tpg_channels; port_num++) {
+ item = kzalloc(sizeof(*item), GFP_KERNEL);
+ if (!item)
+ return -ENOMEM;
+
+ list_add_tail(&item->list, &csi->csi_chans);
+ item->csi = csi;
+ item->csi_port_num = port_num;
+ item->numlanes = 2;
+ item->of_node = node;
+ item->numpads = 1;
+ item->pads[0].flags = MEDIA_PAD_FL_SOURCE;
+ }
+
+ return 0;
+}
+
+static int tegra_csi_channel_init(struct tegra_csi_channel *chan)
+{
+ struct tegra_csi *csi = chan->csi;
+ struct v4l2_subdev *subdev;
+ int ret;
+
+ /* initialize the default format */
+ chan->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ chan->format.field = V4L2_FIELD_NONE;
+ chan->format.colorspace = V4L2_COLORSPACE_SRGB;
+ chan->format.width = TEGRA_DEF_WIDTH;
+ chan->format.height = TEGRA_DEF_HEIGHT;
+
+ /* initialize V4L2 subdevice and media entity */
+ subdev = &chan->subdev;
+ v4l2_subdev_init(subdev, &tegra_csi_ops);
+ subdev->dev = csi->dev;
+ snprintf(subdev->name, V4L2_SUBDEV_NAME_SIZE, "%s-%d", "tpg",
+ chan->csi_port_num);
+
+ v4l2_set_subdevdata(subdev, chan);
+ subdev->fwnode = of_fwnode_handle(chan->of_node);
+ subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+
+ /* initialize media entity pads */
+ ret = media_entity_pads_init(&subdev->entity, chan->numpads,
+ chan->pads);
+ if (ret < 0) {
+ dev_err(csi->dev,
+ "failed to init media entity pads: %d\n", ret);
+ goto error;
+ }
+
+ ret = v4l2_async_register_subdev(subdev);
+ if (ret < 0) {
+ dev_err(csi->dev, "failed to register subdev: %d\n", ret);
+ goto media_cleanup;
+ }
+
+ return 0;
+
+media_cleanup:
+ media_entity_cleanup(&subdev->entity);
+error:
+ subdev = NULL;
+ return ret;
+}
+
+void tegra_csi_error_recover(struct v4l2_subdev *subdev)
+{
+ struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+ struct tegra_csi *csi = csi_chan->csi;
+
+ csi->ops->csi_err_recover(csi_chan);
+}
+
+static void tegra_csi_channels_cleanup(struct tegra_csi *csi)
+{
+ struct v4l2_subdev *subdev;
+ struct tegra_csi_channel *chan, *tmp;
+
+ list_for_each_entry_safe(chan, tmp, &csi->csi_chans, list) {
+ subdev = &chan->subdev;
+ if (subdev) {
+ media_entity_cleanup(&subdev->entity);
+ v4l2_async_unregister_subdev(subdev);
+ subdev = NULL;
+ }
+
+ list_del(&chan->list);
+ kfree(chan);
+ }
+}
+
+static int tegra_csi_init(struct host1x_client *client)
+{
+ struct tegra_csi *csi = host1x_client_to_csi(client);
+ struct tegra_video_device *vid = dev_get_drvdata(client->host);
+ struct tegra_csi_channel *item;
+ int ret;
+
+ vid->csi = csi;
+
+ INIT_LIST_HEAD(&csi->csi_chans);
+
+ ret = tegra_csi_tpg_channels_alloc(csi);
+ if (ret < 0)
+ goto cleanup;
+
+ list_for_each_entry(item, &csi->csi_chans, list) {
+ ret = tegra_csi_channel_init(item);
+ if (ret) {
+ dev_err(csi->dev, "channel init failed: %d\n", ret);
+ goto cleanup;
+ }
+ }
+
+ ret = csi->ops->hw_init(csi);
+ if (ret)
+ goto cleanup;
+
+ ret = pm_runtime_get_sync(csi->dev);
+ if (ret < 0) {
+ dev_err(csi->dev, "runtime resume failed: %d\n", ret);
+ goto cleanup;
+ }
+
+ return 0;
+
+cleanup:
+ tegra_csi_channels_cleanup(csi);
+ return ret;
+}
+
+static int tegra_csi_exit(struct host1x_client *client)
+{
+ struct tegra_csi *csi = host1x_client_to_csi(client);
+ struct tegra_video_device *vid = dev_get_drvdata(client->host);
+
+ if (!vid->csi)
+ return 0;
+
+ pm_runtime_put_sync(csi->dev);
+ tegra_csi_channels_cleanup(csi);
+
+ return 0;
+}
+
+static const struct host1x_client_ops csi_client_ops = {
+ .init = tegra_csi_init,
+ .exit = tegra_csi_exit,
+};
+
+static int tegra_csi_probe(struct platform_device *pdev)
+{
+ struct tegra_csi *csi;
+ struct resource *res;
+ int ret;
+
+ csi = kzalloc(sizeof(*csi), GFP_KERNEL);
+ if (!csi)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ csi->iomem = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(csi->iomem)) {
+ ret = PTR_ERR(csi->iomem);
+ goto cleanup;
+ }
+
+ csi->soc = of_device_get_match_data(&pdev->dev);
+ if (!csi->soc) {
+ ret = -ENODATA;
+ goto cleanup;
+ }
+
+ if (!pdev->dev.pm_domain) {
+ ret = -ENOENT;
+ dev_warn(&pdev->dev, "PM domain is not attached: %d\n", ret);
+ goto cleanup;
+ }
+
+ csi->dev = &pdev->dev;
+ csi->ops = csi->soc->ops;
+ platform_set_drvdata(pdev, csi);
+ pm_runtime_enable(&pdev->dev);
+
+ /* initialize host1x interface */
+ INIT_LIST_HEAD(&csi->client.list);
+ csi->client.ops = &csi_client_ops;
+ csi->client.dev = &pdev->dev;
+
+ ret = host1x_client_register(&csi->client);
+ if (ret < 0) {
+ dev_err(csi->dev,
+ "failed to register host1x client: %d\n", ret);
+ ret = -ENODEV;
+ goto rpm_disable;
+ }
+
+ return 0;
+
+rpm_disable:
+ pm_runtime_disable(&pdev->dev);
+cleanup:
+ kfree(csi);
+ return ret;
+}
+
+static int tegra_csi_remove(struct platform_device *pdev)
+{
+ struct tegra_csi *csi = platform_get_drvdata(pdev);
+ int err;
+
+ pm_runtime_disable(csi->dev);
+
+ err = host1x_client_unregister(&csi->client);
+ if (err < 0) {
+ dev_err(csi->dev,
+ "failed to unregister host1x client: %d\n", err);
+ return err;
+ }
+
+ kfree(csi);
+
+ return 0;
+}
+
+static int csi_runtime_resume(struct device *dev)
+{
+ struct tegra_csi *csi = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(csi->csi_clk);
+ if (ret) {
+ dev_err(csi->dev, "failed to enable csi clock: %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Tegra210 TPG internal logic uses PLLD out along with
+ * the CIL clock. So, enable TPG clock.
+ */
+ if (csi->tpg_clk) {
+ ret = clk_set_rate(csi->tpg_clk, TEGRA210_TPG_CLOCK);
+ if (ret)
+ dev_warn(csi->dev,
+ "failed to set tpg clock rate: %d\n", ret);
+
+ ret = clk_prepare_enable(csi->tpg_clk);
+ if (ret) {
+ dev_err(csi->dev,
+ "failed to enable tpg clock: %d\n", ret);
+ goto disable_csi_clk;
+ }
+ }
+
+ if (csi->cilab_clk) {
+ ret = clk_set_rate(csi->cilab_clk, csi->soc->cil_max_clk_hz);
+ if (ret)
+ dev_warn(csi->dev,
+ "failed to set cilab clock rate: %d\n", ret);
+
+ ret = clk_prepare_enable(csi->cilab_clk);
+ if (ret) {
+ dev_err(csi->dev,
+ "failed to enable cilab clock: %d\n", ret);
+ goto disable_tpg_clk;
+ }
+ }
+
+ if (csi->cilcd_clk) {
+ ret = clk_set_rate(csi->cilcd_clk, csi->soc->cil_max_clk_hz);
+ if (ret)
+ dev_warn(csi->dev,
+ "failed to set cilcd clock rate: %d\n", ret);
+
+ ret = clk_prepare_enable(csi->cilcd_clk);
+ if (ret) {
+ dev_err(csi->dev,
+ "failed to enable cilcd clock: %d\n", ret);
+ goto disable_cilab_clk;
+ }
+ }
+
+ if (csi->cilef_clk) {
+ ret = clk_set_rate(csi->cilef_clk, csi->soc->cil_max_clk_hz);
+ if (ret)
+ dev_warn(csi->dev,
+ "failed to set cilef clock rate: %d\n", ret);
+
+ ret = clk_prepare_enable(csi->cilef_clk);
+ if (ret) {
+ dev_err(csi->dev,
+ "failed to enable cilef clock: %d\n", ret);
+ goto disable_cilcd_clk;
+ }
+ }
+
+ return 0;
+
+disable_cilcd_clk:
+ if (csi->cilcd_clk)
+ clk_disable_unprepare(csi->cilcd_clk);
+disable_cilab_clk:
+ if (csi->cilab_clk)
+ clk_disable_unprepare(csi->cilab_clk);
+disable_tpg_clk:
+ if (csi->tpg_clk)
+ clk_disable_unprepare(csi->tpg_clk);
+disable_csi_clk:
+ clk_disable_unprepare(csi->csi_clk);
+ return ret;
+}
+
+static int csi_runtime_suspend(struct device *dev)
+{
+ struct tegra_csi *csi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(csi->csi_clk);
+ if (csi->tpg_clk)
+ clk_disable_unprepare(csi->tpg_clk);
+ if (csi->cilab_clk)
+ clk_disable_unprepare(csi->cilab_clk);
+ if (csi->cilcd_clk)
+ clk_disable_unprepare(csi->cilcd_clk);
+ if (csi->cilef_clk)
+ clk_disable_unprepare(csi->cilef_clk);
+
+ return 0;
+}
+
+static const struct tegra_csi_ops tegra210_csi_ops = {
+ .hw_init = tegra210_csi_hw_init,
+ .csi_streaming = tegra210_csi_streaming,
+ .csi_err_recover = tegra210_csi_error_recover,
+};
+
+static const struct tegra_csi_soc tegra210_csi_soc = {
+ .ops = &tegra210_csi_ops,
+ .cil_max_clk_hz = 102000000,
+ .csi_max_channels = 6,
+};
+
+static const struct of_device_id tegra_csi_of_id_table[] = {
+ { .compatible = "nvidia,tegra210-csi", .data = &tegra210_csi_soc },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tegra_csi_of_id_table);
+
+static const struct dev_pm_ops tegra_csi_pm_ops = {
+ SET_RUNTIME_PM_OPS(csi_runtime_suspend, csi_runtime_resume, NULL)
+};
+
+struct platform_driver tegra_csi_driver = {
+ .driver = {
+ .name = "tegra-csi",
+ .of_match_table = tegra_csi_of_id_table,
+ .pm = &tegra_csi_pm_ops,
+ },
+ .probe = tegra_csi_probe,
+ .remove = tegra_csi_remove,
+};
+
+MODULE_AUTHOR("Sowjanya Komatineni <skomatineni@xxxxxxxxxx>");
+MODULE_DESCRIPTION("NVIDIA Tegra CSI Device Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/media/tegra/tegra-csi.h b/drivers/staging/media/tegra/tegra-csi.h
new file mode 100644
index 0000000..356fbb5
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-csi.h
@@ -0,0 +1,118 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#ifndef __TEGRA_CSI_H__
+#define __TEGRA_CSI_H__
+
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-v4l2.h>
+
+/*
+ * Each CSI brick supports max of 4 lanes that can be used as either
+ * one x4 port using both CILA and CILB partitions of a CSI brick or can
+ * be used as two x2 ports with one x2 from CILA and the other x2 from
+ * CILB.
+ */
+#define CSI_PORTS_PER_BRICK 2
+
+/* each CSI channel can have one sink and one source pads */
+#define TEGRA_CSI_PADS_NUM 2
+
+enum tegra_csi_cil_port {
+ PORT_A = 0,
+ PORT_B,
+};
+
+enum tegra_csi_block {
+ CSI_CIL_AB = 0,
+ CSI_CIL_CD,
+ CSI_CIL_EF,
+};
+
+struct tegra_csi;
+
+struct tegra_csi_channel {
+ struct list_head list;
+ struct v4l2_subdev subdev;
+ struct media_pad pads[TEGRA_CSI_PADS_NUM];
+ struct device_node *of_node;
+ struct tegra_csi *csi;
+ unsigned int numlanes;
+ unsigned int numpads;
+ u8 csi_port_num;
+
+ /* one pair of sink/source pad has one format */
+ struct v4l2_mbus_framefmt format;
+};
+
+/**
+ * struct tegra_csi_ops - Tegra CSI operations
+ * @hw_init: gets the tegra csi and cil clocks.
+ * @csi_streaming: programs csi hardware to enable or disable streaming.
+ * @csi_err_recover: csi hardware block recovery incase of any capture errors

incase -> in case

Better check for other occurrences of that typo :-)

+ * due to missing source stream or due to improper csi input from
+ * the external source.
+ */
+struct tegra_csi_ops {
+ int (*hw_init)(struct tegra_csi *csi);
+ int (*csi_streaming)(struct tegra_csi_channel *csi_chan, u8 pg_mode,
+ int enable);
+ void (*csi_err_recover)(struct tegra_csi_channel *csi_chan);
+};
+
+/**
+ * struct tegra_csi_soc - NVIDIA Tegra CSI SoC structure
+ * @ops: csi hardware operations
+ * @cil_max_clk_hz: cil clock max frequency
+ * @csi_max_channels: supported max streaming channels
+ */
+struct tegra_csi_soc {
+ const struct tegra_csi_ops *ops;
+ unsigned int cil_max_clk_hz;
+ unsigned int csi_max_channels;
+};
+
+/**
+ * struct tegra_csi - NVIDIA Tegra CSI device structure
+ *
+ * @dev: device struct
+ * @client: host1x_client struct
+ * @iomem: register base
+ * @csi_clk: clock for CSI
+ * @cilab_clk: clock for CIL AB
+ * @cilcd_clk: clock for CIL CD
+ * @cilef_clk: clock for CIL EF
+ * @tpg_clk: clock for internal CSI TPG logic
+ * @soc: pointer to SoC data structure
+ * @ops: csi operations
+ * @channels: list head for CSI channels
+ */
+struct tegra_csi {
+ struct device *dev;
+ struct host1x_client client;
+ void __iomem *iomem;
+ struct clk *csi_clk;
+ struct clk *cilab_clk;
+ struct clk *cilcd_clk;
+ struct clk *cilef_clk;
+ struct clk *tpg_clk;
+ const struct tegra_csi_soc *soc;
+ const struct tegra_csi_ops *ops;
+ struct list_head csi_chans;
+};
+
+void tegra_csi_error_recover(struct v4l2_subdev *subdev);
+
+void tegra210_csi_error_recover(struct tegra_csi_channel *csi_chan);
+int tegra210_csi_streaming(struct tegra_csi_channel *csi_chan, u8 pg_mode,
+ int enable);
+int tegra210_csi_hw_init(struct tegra_csi *csi);
+
+#endif
diff --git a/drivers/staging/media/tegra/tegra-vi.c b/drivers/staging/media/tegra/tegra-vi.c
new file mode 100644
index 0000000..76e1bfc
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-vi.c
@@ -0,0 +1,1060 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/bitmap.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/host1x.h>
+#include <linux/kthread.h>
+#include <linux/lcm.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "tegra-video.h"
+#include "tegra-common.h"
+#include "tegra-vi.h"
+
+#define SURFACE_ALIGN_BYTES 64
+#define MAX_CID_CONTROLS 1
+
+static const struct tegra_video_format tegra_default_format = {
+ .img_dt = TEGRA_IMAGE_DT_RAW10,
+ .bit_width = 10,
+ .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .bpp = 2,
+ .img_fmt = TEGRA_IMAGE_FORMAT_DEF,
+ .fourcc = V4L2_PIX_FMT_SRGGB10,
+};
+
+static inline struct tegra_vi *
+host1x_client_to_vi(struct host1x_client *client)
+{
+ return container_of(client, struct tegra_vi, client);
+}
+
+static inline struct tegra_channel_buffer *
+to_tegra_channel_buffer(struct vb2_v4l2_buffer *vb)
+{
+ return container_of(vb, struct tegra_channel_buffer, buf);
+}
+
+static int tegra_get_format_idx_by_code(struct tegra_vi *vi,
+ unsigned int code)
+{
+ unsigned int i;
+
+ for (i = 0; i < vi->soc->nformats; ++i) {
+ if (vi->soc->video_formats[i].code == code)
+ return i;
+ }
+
+ return -1;
+}
+
+static u32 tegra_get_format_fourcc_by_idx(struct tegra_vi *vi,
+ unsigned int index)
+{
+ if (index >= vi->soc->nformats)
+ return -EINVAL;
+
+ return vi->soc->video_formats[index].fourcc;
+}
+
+static const struct tegra_video_format *
+tegra_get_format_by_fourcc(struct tegra_vi *vi, u32 fourcc)
+{
+ unsigned int i;
+
+ for (i = 0; i < vi->soc->nformats; ++i) {
+ if (vi->soc->video_formats[i].fourcc == fourcc)
+ return &vi->soc->video_formats[i];
+ }
+
+ return NULL;
+}
+
+/* VI only support 2 formats in TPG mode */
+static void vi_tpg_fmts_bitmap_init(struct tegra_vi_channel *chan)
+{
+ int index;
+
+ bitmap_zero(chan->tpg_fmts_bitmap, MAX_FORMAT_NUM);
+
+ index = tegra_get_format_idx_by_code(chan->vi,
+ MEDIA_BUS_FMT_SRGGB10_1X10);
+ bitmap_set(chan->tpg_fmts_bitmap, index, 1);
+
+ index = tegra_get_format_idx_by_code(chan->vi,
+ MEDIA_BUS_FMT_RGB888_1X32_PADHI);
+ bitmap_set(chan->tpg_fmts_bitmap, index, 1);
+}
+
+/*
+ * videobuf2 queue operations
+ */
+static int tegra_channel_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers,
+ unsigned int *nplanes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
+
+ if (*nplanes)
+ return sizes[0] < chan->format.sizeimage ? -EINVAL : 0;
+
+ *nplanes = 1;
+ sizes[0] = chan->format.sizeimage;
+ alloc_devs[0] = chan->vi->dev;
+
+ return 0;
+}
+
+static int tegra_channel_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct tegra_channel_buffer *buf = to_tegra_channel_buffer(vbuf);
+ unsigned long size = chan->format.sizeimage;
+
+ if (vb2_plane_size(vb, 0) < size) {
+ v4l2_err(chan->video->v4l2_dev,
+ "buffer too small (%lu < %lu)\n",
+ vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(vb, 0, size);
+ buf->chan = chan;
+ buf->addr = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ return 0;
+}
+
+static void tegra_channel_buffer_queue(struct vb2_buffer *vb)
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct tegra_channel_buffer *buf = to_tegra_channel_buffer(vbuf);
+
+ /* put buffer into the capture queue */
+ spin_lock(&chan->start_lock);
+ list_add_tail(&buf->queue, &chan->capture);
+ spin_unlock(&chan->start_lock);
+
+ /* wait up kthread for capture */
+ wake_up_interruptible(&chan->start_wait);
+}
+
+static struct v4l2_subdev *
+tegra_channel_get_remote_subdev(struct tegra_vi_channel *chan)
+{
+ struct media_pad *pad;
+ struct v4l2_subdev *subdev;
+ struct media_entity *entity;
+
+ pad = media_entity_remote_pad(&chan->pad);
+ entity = pad->entity;
+ subdev = media_entity_to_v4l2_subdev(entity);
+
+ return subdev;
+}
+
+int tegra_channel_csi_error_recover(struct tegra_vi_channel *chan)
+{
+ struct v4l2_subdev *subdev;
+
+ subdev = tegra_channel_get_remote_subdev(chan);
+ tegra_csi_error_recover(subdev);
+ return 0;
+}
+
+int tegra_channel_set_stream(struct tegra_vi_channel *chan, bool on)
+{
+ struct v4l2_subdev *subdev;
+ int ret;
+
+ /* stream CSI */
+ subdev = tegra_channel_get_remote_subdev(chan);
+ v4l2_set_subdev_hostdata(subdev, chan);
+ ret = v4l2_subdev_call(subdev, video, s_stream, on);
+ if (on && ret < 0 && ret != -ENOIOCTLCMD)
+ return ret;
+
+ return 0;
+}
+
+void tegra_channel_release_buffers(struct tegra_vi_channel *chan,
+ enum vb2_buffer_state state)
+{
+ struct tegra_channel_buffer *buf, *nbuf;
+
+ spin_lock(&chan->start_lock);
+ list_for_each_entry_safe(buf, nbuf, &chan->capture, queue) {
+ vb2_buffer_done(&buf->buf.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+
+ spin_unlock(&chan->start_lock);
+
+ spin_lock(&chan->done_lock);
+ list_for_each_entry_safe(buf, nbuf, &chan->done, queue) {
+ vb2_buffer_done(&buf->buf.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+
+ spin_unlock(&chan->done_lock);
+}
+
+static int tegra_channel_start_streaming(struct vb2_queue *vq, u32 count)
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
+
+ return chan->vi->ops->vi_start_streaming(vq, count);
+}
+
+static void tegra_channel_stop_streaming(struct vb2_queue *vq)
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
+
+ chan->vi->ops->vi_stop_streaming(vq);
+}
+
+static const struct vb2_ops tegra_channel_queue_qops = {
+ .queue_setup = tegra_channel_queue_setup,
+ .buf_prepare = tegra_channel_buffer_prepare,
+ .buf_queue = tegra_channel_buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = tegra_channel_start_streaming,
+ .stop_streaming = tegra_channel_stop_streaming,
+};
+
+/*
+ * V4L2 ioctls
+ */
+static int tegra_channel_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct tegra_vi_channel *chan = video_drvdata(file);
+
+ strscpy(cap->driver, "tegra-video", sizeof(cap->driver));
+ strscpy(cap->card, chan->video->name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ dev_name(chan->vi->dev));
+
+ return 0;
+}
+
+static int tegra_channel_enum_format(struct file *file, void *fh,
+ struct v4l2_fmtdesc *f)
+{
+ struct tegra_vi_channel *chan = video_drvdata(file);
+ unsigned int index = 0, i;
+ unsigned long *fmts_bitmap = chan->tpg_fmts_bitmap;
+
+ if (f->index >= bitmap_weight(fmts_bitmap, MAX_FORMAT_NUM))
+ return -EINVAL;
+
+ for (i = 0; i < f->index + 1; i++, index++)
+ index = find_next_bit(fmts_bitmap, MAX_FORMAT_NUM, index);
+
+ f->pixelformat = tegra_get_format_fourcc_by_idx(chan->vi, index - 1);
+
+ return 0;
+}
+
+static int tegra_channel_get_format(struct file *file, void *fh,
+ struct v4l2_format *format)
+{
+ struct tegra_vi_channel *chan = video_drvdata(file);
+
+ format->fmt.pix = chan->format;
+ return 0;
+}
+
+static int __tegra_channel_try_format(struct tegra_vi_channel *chan,
+ struct v4l2_pix_format *pix,
+ const struct tegra_video_format **vfmt)
+{
+ const struct tegra_video_format *fmt_info;
+ struct v4l2_subdev *subdev;
+ struct v4l2_subdev_format fmt;
+ struct v4l2_subdev_pad_config *pad_cfg;
+ unsigned int align;
+ unsigned int min_width;
+ unsigned int max_width;
+ unsigned int width;
+ unsigned int min_bpl;
+ unsigned int max_bpl;
+ unsigned int bpl;
+
+ subdev = tegra_channel_get_remote_subdev(chan);
+ pad_cfg = v4l2_subdev_alloc_pad_config(subdev);
+ if (!pad_cfg)
+ return -ENOMEM;
+
+ /*
+ * Retrieve the format information and if requested format isn't
+ * supported, keep the current format.
+ */
+ fmt_info = tegra_get_format_by_fourcc(chan->vi, pix->pixelformat);
+ if (!fmt_info) {
+ pix->pixelformat = chan->format.pixelformat;
+ pix->colorspace = chan->format.colorspace;
+ fmt_info = tegra_get_format_by_fourcc(chan->vi,
+ pix->pixelformat);
+ }
+
+ pix->field = V4L2_FIELD_NONE;
+ fmt.which = V4L2_SUBDEV_FORMAT_TRY;
+ fmt.pad = 0;
+ v4l2_fill_mbus_format(&fmt.format, pix, fmt_info->code);
+ v4l2_subdev_call(subdev, pad, set_fmt, pad_cfg, &fmt);
+ v4l2_fill_pix_format(pix, &fmt.format);
+
+ /*
+ * The transfer alignment requirements are expressed in bytes. Compute
+ * minimum and maximum values, clamp the requested width and convert
+ * it back to pixels. Use bytesperline to adjust the width.
+ */
+ align = lcm(SURFACE_ALIGN_BYTES, fmt_info->bpp);
+ min_width = roundup(TEGRA_MIN_WIDTH, align);
+ max_width = rounddown(TEGRA_MAX_WIDTH, align);
+ width = roundup(pix->width * fmt_info->bpp, align);
+
+ pix->width = clamp(width, min_width, max_width) / fmt_info->bpp;
+ pix->height = clamp(pix->height, TEGRA_MIN_HEIGHT, TEGRA_MAX_HEIGHT);
+
+ /* Clamp the requested bytes per line value. If the maximum bytes per
+ * line value is zero, the module doesn't support user configurable
+ * line sizes. Override the requested value with the minimum in that
+ * case.
+ */
+ min_bpl = pix->width * fmt_info->bpp;
+ max_bpl = rounddown(TEGRA_MAX_WIDTH, SURFACE_ALIGN_BYTES);
+ bpl = roundup(pix->bytesperline, SURFACE_ALIGN_BYTES);
+
+ pix->bytesperline = clamp(bpl, min_bpl, max_bpl);
+ pix->sizeimage = pix->bytesperline * pix->height;
+
+ if (vfmt)
+ *vfmt = fmt_info;
+
+ v4l2_subdev_free_pad_config(pad_cfg);
+
+ return 0;
+}
+
+static int tegra_channel_try_format(struct file *file, void *fh,
+ struct v4l2_format *format)
+{
+ struct tegra_vi_channel *chan = video_drvdata(file);
+
+ return __tegra_channel_try_format(chan, &format->fmt.pix, NULL);
+}
+
+static int tegra_channel_set_format(struct file *file, void *fh,
+ struct v4l2_format *format)
+{
+ struct tegra_vi_channel *chan = video_drvdata(file);
+ const struct tegra_video_format *info;
+ struct v4l2_subdev_format fmt;
+ struct v4l2_subdev *subdev;
+ struct v4l2_pix_format *pix = &format->fmt.pix;
+ int ret;
+
+ if (vb2_is_busy(&chan->queue))
+ return -EBUSY;
+
+ /* get supported format by try_fmt */
+ ret = __tegra_channel_try_format(chan, pix, &info);
+ if (ret)
+ return ret;
+
+ fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ fmt.pad = 0;
+ v4l2_fill_mbus_format(&fmt.format, pix, info->code);
+ subdev = tegra_channel_get_remote_subdev(chan);
+ v4l2_subdev_call(subdev, pad, set_fmt, NULL, &fmt);
+ v4l2_fill_pix_format(pix, &fmt.format);
+
+ chan->format = *pix;
+ chan->fmtinfo = info;
+
+ return 0;
+}
+
+static int tegra_channel_enum_input(struct file *file, void *fh,
+ struct v4l2_input *inp)
+{
+ /* currently driver supports internal TPG only */
+ if (inp->index)
+ return -EINVAL;
+
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ strscpy(inp->name, "Tegra TPG", sizeof(inp->name));
+
+ return 0;
+}
+
+static int tegra_channel_g_input(struct file *file, void *priv,
+ unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int tegra_channel_s_input(struct file *file, void *priv,
+ unsigned int input)
+{
+ if (input > 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops tegra_channel_ioctl_ops = {
+ .vidioc_querycap = tegra_channel_querycap,
+ .vidioc_enum_fmt_vid_cap = tegra_channel_enum_format,
+ .vidioc_g_fmt_vid_cap = tegra_channel_get_format,
+ .vidioc_s_fmt_vid_cap = tegra_channel_set_format,
+ .vidioc_try_fmt_vid_cap = tegra_channel_try_format,
+ .vidioc_enum_input = tegra_channel_enum_input,
+ .vidioc_g_input = tegra_channel_g_input,
+ .vidioc_s_input = tegra_channel_s_input,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/*
+ * V4L2 file operations
+ */
+static const struct v4l2_file_operations tegra_channel_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = video_ioctl2,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+};
+
+static const char *const vi_pattern_strings[] = {
+ "Black/White Direct Mode",
+ "Color Patch Mode",
+};
+
+static int vi_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct tegra_vi_channel *chan = container_of(ctrl->handler,
+ struct tegra_vi_channel,
+ ctrl_handler);
+
+ switch (ctrl->id) {
+ case V4L2_CID_TEST_PATTERN:
+ /* pattern change takes effect on next stream */
+ chan->pg_mode = ctrl->val + 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops vi_ctrl_ops = {
+ .s_ctrl = vi_s_ctrl,
+};
+
+int tegra_channel_setup_ctrl_handler(struct tegra_vi_channel *chan)
+{
+ int ret;
+
+ /* add test pattern control handler to v4l2 device */
+ v4l2_ctrl_new_std_menu_items(&chan->ctrl_handler, &vi_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(vi_pattern_strings) - 1,
+ 0, 0, vi_pattern_strings);
+ if (chan->ctrl_handler.error) {
+ dev_err(chan->vi->dev, "failed to add TPG ctrl handler: %d\n",
+ chan->ctrl_handler.error);
+ v4l2_ctrl_handler_free(&chan->ctrl_handler);
+ return chan->ctrl_handler.error;
+ }
+
+ /* setup the controls */
+ ret = v4l2_ctrl_handler_setup(&chan->ctrl_handler);
+ if (ret < 0) {
+ dev_err(chan->vi->dev,
+ "failed to setup v4l2 ctrl handler: %d\n", ret);
+ goto free_hdl;
+ }
+
+ return 0;
+
+free_hdl:
+ v4l2_ctrl_handler_free(&chan->ctrl_handler);
+ return ret;
+}
+
+static int tegra_channel_init(struct tegra_vi_channel *chan)
+{
+ struct tegra_vi *vi = chan->vi;
+ struct tegra_video_device *vid = dev_get_drvdata(vi->client.host);
+ unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED;
+ int ret;
+
+ mutex_init(&chan->video_lock);
+ INIT_LIST_HEAD(&chan->capture);
+ INIT_LIST_HEAD(&chan->done);
+ spin_lock_init(&chan->start_lock);
+ spin_lock_init(&chan->done_lock);
+ init_waitqueue_head(&chan->start_wait);
+ init_waitqueue_head(&chan->done_wait);
+
+ /* initialize the video format */
+ chan->fmtinfo = &tegra_default_format;
+ chan->format.pixelformat = chan->fmtinfo->fourcc;
+ chan->format.colorspace = V4L2_COLORSPACE_SRGB;
+ chan->format.field = V4L2_FIELD_NONE;
+ chan->format.width = TEGRA_DEF_WIDTH;
+ chan->format.height = TEGRA_DEF_HEIGHT;
+ chan->format.bytesperline = TEGRA_DEF_WIDTH * chan->fmtinfo->bpp;
+ chan->format.sizeimage = chan->format.bytesperline * TEGRA_DEF_HEIGHT;
+
+ chan->video = video_device_alloc();
+ if (!chan->video) {
+ dev_err(vi->dev,
+ "unable to allocate video device\n");
+ return -ENOMEM;
+ }
+
+ /* initialize the media entity */
+ chan->pad.flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_pads_init(&chan->video->entity, 1, &chan->pad);
+ if (ret < 0) {
+ dev_err(vi->dev,
+ "video entity init failed: %d\n", ret);
+ goto release_vdev;
+ }
+
+ ret = v4l2_ctrl_handler_init(&chan->ctrl_handler, MAX_CID_CONTROLS);
+ if (chan->ctrl_handler.error) {
+ dev_err(vi->dev,
+ "V4L2 controls handler init failed: %d\n", ret);
+ goto cleanup_media;
+ }
+
+ /* initialize the video_device */
+ chan->video->fops = &tegra_channel_fops;
+ chan->video->v4l2_dev = &vid->v4l2_dev;
+ chan->video->release = video_device_release;
+ chan->video->queue = &chan->queue;
+ snprintf(chan->video->name, sizeof(chan->video->name), "%s-%s-%u",
+ dev_name(vi->dev), "output", chan->portno);
+ chan->video->vfl_type = VFL_TYPE_VIDEO;
+ chan->video->vfl_dir = VFL_DIR_RX;
+ chan->video->ioctl_ops = &tegra_channel_ioctl_ops;
+ chan->video->ctrl_handler = &chan->ctrl_handler;
+ chan->video->lock = &chan->video_lock;
+ chan->video->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+ video_set_drvdata(chan->video, chan);
+
+ chan->frame_start_sp = host1x_syncpt_request(&vi->client, flags);
+ if (!chan->frame_start_sp) {
+ dev_err(vi->dev, "failed to request frame start syncpoint\n");
+ ret = -ENOMEM;
+ goto free_v4l2_ctrl_hdl;
+ }
+
+ chan->mw_ack_sp = host1x_syncpt_request(&vi->client, flags);
+ if (!chan->mw_ack_sp) {
+ dev_err(vi->dev, "failed to request memory ack syncpoint\n");
+ ret = -ENOMEM;
+ goto free_fs_syncpt;
+ }
+
+ chan->queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ chan->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+ chan->queue.lock = &chan->video_lock;
+ chan->queue.drv_priv = chan;
+ chan->queue.buf_struct_size = sizeof(struct tegra_channel_buffer);
+ chan->queue.ops = &tegra_channel_queue_qops;
+ chan->queue.min_buffers_needed = 3;
+ chan->queue.mem_ops = &vb2_dma_contig_memops;
+ chan->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ chan->queue.dev = vi->dev;
+ ret = vb2_queue_init(&chan->queue);
+ if (ret < 0) {
+ dev_err(vi->dev, "failed to initialize VB2 queue: %d\n", ret);
+ goto free_mw_ack_syncpt;
+ }
+
+ ret = video_register_device(chan->video, VFL_TYPE_VIDEO, -1);
+ if (ret < 0) {
+ dev_err(&chan->video->dev,
+ "failed to register video device: %d\n", ret);
+ goto rel_vb2_queue;
+ }
+
+ return 0;
+
+rel_vb2_queue:
+ vb2_queue_release(&chan->queue);
+free_mw_ack_syncpt:
+ host1x_syncpt_free(chan->mw_ack_sp);
+free_fs_syncpt:
+ host1x_syncpt_free(chan->frame_start_sp);
+free_v4l2_ctrl_hdl:
+ v4l2_ctrl_handler_free(&chan->ctrl_handler);
+cleanup_media:
+ media_entity_cleanup(&chan->video->entity);
+release_vdev:
+ video_device_release(chan->video);
+ return ret;
+}
+
+static int tegra_vi_tpg_channels_alloc(struct tegra_vi *vi)
+{
+ struct tegra_vi_channel *chan, *tmp;
+ unsigned int port_num;
+ unsigned int nchannels = vi->soc->vi_max_channels;
+ int ret = 0;
+
+ for (port_num = 0; port_num < nchannels; port_num++) {
+ chan = kzalloc(sizeof(*chan), GFP_KERNEL);
+ if (!chan) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ list_add_tail(&chan->list, &vi->vi_chans);
+ chan->vi = vi;
+ chan->portno = port_num;
+ }
+
+ return 0;
+
+cleanup:
+ list_for_each_entry_safe(chan, tmp, &vi->vi_chans, list) {
+ list_del(&chan->list);
+ kfree(chan);
+ }
+
+ return ret;
+}
+
+static int tegra_vi_channels_init(struct tegra_vi *vi)
+{
+ struct tegra_vi_channel *chan;
+ int ret;
+
+ list_for_each_entry(chan, &vi->vi_chans, list) {
+ ret = tegra_channel_init(chan);
+ if (ret < 0) {
+ dev_err(vi->dev, "channel %d init failed: %d\n",
+ chan->portno, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void tegra_vi_channels_cleanup(struct tegra_vi *vi)
+{
+ struct tegra_vi_channel *chan, *tmp;
+
+ list_for_each_entry_safe(chan, tmp, &vi->vi_chans, list) {
+ if (chan->video && video_is_registered(chan->video)) {
+ vb2_queue_release(&chan->queue);
+ media_entity_cleanup(&chan->video->entity);
+ video_unregister_device(chan->video);
+ video_device_release(chan->video);
+ }
+
+ if (chan->frame_start_sp)
+ host1x_syncpt_free(chan->frame_start_sp);
+
+ if (chan->mw_ack_sp)
+ host1x_syncpt_free(chan->mw_ack_sp);
+
+ v4l2_ctrl_handler_free(&chan->ctrl_handler);
+
+ list_del(&chan->list);
+ kfree(chan);
+ }
+}
+
+static int tegra_vi_tpg_graph_init(struct tegra_vi *vi)
+{
+ struct tegra_video_device *vid = dev_get_drvdata(vi->client.host);
+ struct tegra_csi *csi = vid->csi;
+ struct tegra_vi_channel *vi_chan;
+ struct tegra_csi_channel *csi_chan;
+ u32 link_flags = MEDIA_LNK_FL_ENABLED;
+ int ret = 0;
+
+ csi_chan = list_first_entry(&csi->csi_chans, struct tegra_csi_channel,
+ list);
+
+ list_for_each_entry(vi_chan, &vi->vi_chans, list) {
+ struct media_entity *source = &csi_chan->subdev.entity;
+ struct media_entity *sink = &vi_chan->video->entity;
+ struct media_pad *source_pad = csi_chan->pads;
+ struct media_pad *sink_pad = &vi_chan->pad;
+
+ ret = v4l2_device_register_subdev(&vid->v4l2_dev,
+ &csi_chan->subdev);
+ if (ret) {
+ dev_err(vi->dev, "failed to register subdev: %d\n",
+ ret);
+ goto register_fail;
+ }
+
+ dev_dbg(vi->dev, "creating %s:%u -> %s:%u link\n",
+ source->name, source_pad->index,
+ sink->name, sink_pad->index);
+
+ ret = media_create_pad_link(source, source_pad->index,
+ sink, sink_pad->index,
+ link_flags);
+ if (ret < 0) {
+ dev_err(vi->dev,
+ "failed to create %s:%u -> %s:%u link: %d\n",
+ source->name, source_pad->index,
+ sink->name, sink_pad->index, ret);
+ goto register_fail;
+ }
+
+ vi_tpg_fmts_bitmap_init(vi_chan);
+ tegra_channel_setup_ctrl_handler(vi_chan);
+
+ csi_chan = list_next_entry(csi_chan, list);
+ }
+
+ return 0;
+
+register_fail:
+ list_for_each_entry(csi_chan, &csi->csi_chans, list)
+ v4l2_device_unregister_subdev(&csi_chan->subdev);
+ return ret;
+}
+
+static void tegra_vi_tpg_graph_cleanup(struct tegra_vi *vi)
+{
+ struct tegra_video_device *vid = dev_get_drvdata(vi->client.host);
+ struct tegra_csi_channel *csi_chan;
+
+ list_for_each_entry(csi_chan, &vid->csi->csi_chans, list)
+ v4l2_device_unregister_subdev(&csi_chan->subdev);
+}
+
+static int tegra_vi_init(struct host1x_client *client)
+{
+ struct tegra_video_device *vid = dev_get_drvdata(client->host);
+ struct tegra_vi *vi = host1x_client_to_vi(client);
+ int ret;
+
+ vid->vi = vi;
+ vid->media_dev.hw_revision = vi->soc->hw_revision;
+ snprintf(vid->media_dev.bus_info, sizeof(vid->media_dev.bus_info),
+ "platform:%s", dev_name(vi->dev));
+
+ if (!vid->csi) {
+ dev_err(vi->dev, "csi host1x client is not initialized\n");
+ return -ENODEV;
+ }
+
+ INIT_LIST_HEAD(&vi->vi_chans);
+
+ /* create all TPG channels */
+ ret = tegra_vi_tpg_channels_alloc(vi);
+ if (ret < 0)
+ return ret;
+
+ /* initialize Tegra VI channels */
+ ret = tegra_vi_channels_init(vi);
+ if (ret < 0)
+ goto cleanup;
+
+ ret = pm_runtime_get_sync(vi->dev);
+ if (ret < 0) {
+ dev_err(vi->dev, "runtime resume failed: %d\n", ret);
+ goto cleanup;
+ }
+
+ /* setup media links between Tegra VI and CSI for TPG */
+ ret = tegra_vi_tpg_graph_init(vi);
+ if (ret < 0) {
+ pm_runtime_put_sync(vi->dev);
+ goto cleanup;
+ }
+
+ return 0;
+
+cleanup:
+ tegra_vi_channels_cleanup(vi);
+ return ret;
+}
+
+static int tegra_vi_exit(struct host1x_client *client)
+{
+ struct tegra_video_device *vid = dev_get_drvdata(client->host);
+ struct tegra_vi *vi = vid->vi;
+
+ if (!vid->vi)
+ return 0;
+
+ pm_runtime_put_sync(vi->dev);
+ tegra_vi_tpg_graph_cleanup(vi);
+ tegra_vi_channels_cleanup(vi);
+
+ return 0;
+}
+
+static const struct host1x_client_ops vi_client_ops = {
+ .init = tegra_vi_init,
+ .exit = tegra_vi_exit,
+};
+
+static int tegra_vi_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct tegra_vi *vi;
+ int ret;
+
+ vi = kzalloc(sizeof(*vi), GFP_KERNEL);
+ if (!vi)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ vi->iomem = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(vi->iomem)) {
+ ret = PTR_ERR(vi->iomem);
+ goto cleanup;
+ }
+
+ vi->soc = of_device_get_match_data(&pdev->dev);
+ if (!vi->soc) {
+ ret = -ENODATA;
+ goto cleanup;
+ }
+
+ vi->vi_clk = devm_clk_get(&pdev->dev, "vi");
+ if (IS_ERR(vi->vi_clk)) {
+ ret = PTR_ERR(vi->vi_clk);
+ dev_err(&pdev->dev, "failed to get vi clock: %d\n", ret);
+ goto cleanup;
+ }
+
+ vi->vi_reg = devm_regulator_get(&pdev->dev, "avdd-dsi-csi");
+ if (IS_ERR(vi->vi_reg)) {
+ ret = PTR_ERR(vi->vi_reg);
+ dev_err(&pdev->dev, "failed to get VDD supply: %d\n", ret);
+ goto cleanup;
+ }
+
+ if (!pdev->dev.pm_domain) {
+ ret = -ENOENT;
+ dev_warn(&pdev->dev, "PM domain is not attached: %d\n", ret);
+ goto cleanup;
+ }
+
+ ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to populate vi child device: %d\n", ret);
+ goto cleanup;
+ }
+
+ vi->dev = &pdev->dev;
+ vi->ops = vi->soc->ops;
+ platform_set_drvdata(pdev, vi);
+ pm_runtime_enable(&pdev->dev);
+
+ /* initialize host1x interface */
+ INIT_LIST_HEAD(&vi->client.list);
+ vi->client.ops = &vi_client_ops;
+ vi->client.dev = &pdev->dev;
+
+ ret = host1x_client_register(&vi->client);
+ if (ret < 0) {
+ dev_err(vi->dev,
+ "failed to register host1x client: %d\n", ret);
+ ret = -ENODEV;
+ goto rpm_disable;
+ }
+
+ return 0;
+
+rpm_disable:
+ pm_runtime_disable(&pdev->dev);
+ of_platform_depopulate(vi->dev);
+cleanup:
+ kfree(vi);
+ return ret;
+}
+
+static int tegra_vi_remove(struct platform_device *pdev)
+{
+ struct tegra_vi *vi = platform_get_drvdata(pdev);
+ int err;
+
+ pm_runtime_disable(vi->dev);
+
+ err = host1x_client_unregister(&vi->client);
+ if (err < 0) {
+ dev_err(vi->dev,
+ "failed to unregister host1x client: %d\n", err);
+ return err;
+ }
+
+ of_platform_depopulate(vi->dev);
+ kfree(vi);
+
+ return 0;
+}
+
+static int vi_runtime_resume(struct device *dev)
+{
+ struct tegra_vi *vi = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_enable(vi->vi_reg);
+ if (ret) {
+ dev_err(dev, "failed to enable VDD supply: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_set_rate(vi->vi_clk, vi->soc->vi_max_clk_hz);
+ if (ret) {
+ dev_err(dev, "failed to set vi clock rate: %d\n", ret);
+ goto disable_vi_reg;
+ }
+
+ ret = clk_prepare_enable(vi->vi_clk);
+ if (ret) {
+ dev_err(dev, "failed to enable vi clock: %d\n", ret);
+ goto disable_vi_reg;
+ }
+
+ return 0;
+
+disable_vi_reg:
+ regulator_disable(vi->vi_reg);
+ return ret;
+}
+
+static int vi_runtime_suspend(struct device *dev)
+{
+ struct tegra_vi *vi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(vi->vi_clk);
+ regulator_disable(vi->vi_reg);
+
+ return 0;
+}
+
+/* Tegra supported video formats */
+const struct tegra_video_format tegra210_video_formats[] = {
+ /* RAW 8 */
+ TEGRA_VIDEO_FORMAT(RAW8, 8, SRGGB8_1X8, 1, T_L8, SRGGB8),
+ TEGRA_VIDEO_FORMAT(RAW8, 8, SGRBG8_1X8, 1, T_L8, SGRBG8),
+ TEGRA_VIDEO_FORMAT(RAW8, 8, SGBRG8_1X8, 1, T_L8, SGBRG8),
+ TEGRA_VIDEO_FORMAT(RAW8, 8, SBGGR8_1X8, 1, T_L8, SBGGR8),
+ /* RAW 10 */
+ TEGRA_VIDEO_FORMAT(RAW10, 10, SRGGB10_1X10, 2, T_R16_I, SRGGB10),
+ TEGRA_VIDEO_FORMAT(RAW10, 10, SGRBG10_1X10, 2, T_R16_I, SGRBG10),
+ TEGRA_VIDEO_FORMAT(RAW10, 10, SGBRG10_1X10, 2, T_R16_I, SGBRG10),
+ TEGRA_VIDEO_FORMAT(RAW10, 10, SBGGR10_1X10, 2, T_R16_I, SBGGR10),
+ /* RAW 12 */
+ TEGRA_VIDEO_FORMAT(RAW12, 12, SRGGB12_1X12, 2, T_R16_I, SRGGB12),
+ TEGRA_VIDEO_FORMAT(RAW12, 12, SGRBG12_1X12, 2, T_R16_I, SGRBG12),
+ TEGRA_VIDEO_FORMAT(RAW12, 12, SGBRG12_1X12, 2, T_R16_I, SGBRG12),
+ TEGRA_VIDEO_FORMAT(RAW12, 12, SBGGR12_1X12, 2, T_R16_I, SBGGR12),
+ /* RGB888 */
+ TEGRA_VIDEO_FORMAT(RGB888, 24, RGB888_1X24, 4, T_A8R8G8B8, RGB24),
+ TEGRA_VIDEO_FORMAT(RGB888, 24, RGB888_1X32_PADHI, 4, T_A8B8G8R8,
+ XBGR32),
+ /* YUV422 */
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, UYVY8_1X16, 2, T_U8_Y8__V8_Y8, UYVY),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, VYUY8_1X16, 2, T_V8_Y8__U8_Y8, VYUY),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, YUYV8_1X16, 2, T_Y8_U8__Y8_V8, YUYV),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, YVYU8_1X16, 2, T_Y8_V8__Y8_U8, YVYU),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, UYVY8_1X16, 1, T_Y8__V8U8_N422, NV16),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, UYVY8_2X8, 2, T_U8_Y8__V8_Y8, UYVY),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, VYUY8_2X8, 2, T_V8_Y8__U8_Y8, VYUY),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, YUYV8_2X8, 2, T_Y8_U8__Y8_V8, YUYV),
+ TEGRA_VIDEO_FORMAT(YUV422_8, 16, YVYU8_2X8, 2, T_Y8_V8__Y8_U8, YVYU),
+};
+
+static const struct tegra_vi_ops tegra210_vi_ops = {
+ .vi_start_streaming = tegra210_vi_start_streaming,
+ .vi_stop_streaming = tegra210_vi_stop_streaming,
+};
+
+static const struct tegra_vi_soc tegra210_vi_soc = {
+ .video_formats = tegra210_video_formats,
+ .nformats = ARRAY_SIZE(tegra210_video_formats),
+ .ops = &tegra210_vi_ops,
+ .hw_revision = 3,
+ .vi_max_channels = 6,
+ .vi_max_clk_hz = 499200000,
+};
+
+static const struct of_device_id tegra_vi_of_id_table[] = {
+ { .compatible = "nvidia,tegra210-vi", .data = &tegra210_vi_soc },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tegra_vi_of_id_table);
+
+static const struct dev_pm_ops tegra_vi_pm_ops = {
+ SET_RUNTIME_PM_OPS(vi_runtime_suspend, vi_runtime_resume, NULL)
+};
+
+struct platform_driver tegra_vi_driver = {
+ .driver = {
+ .name = "tegra-vi",
+ .of_match_table = tegra_vi_of_id_table,
+ .pm = &tegra_vi_pm_ops,
+ },
+ .probe = tegra_vi_probe,
+ .remove = tegra_vi_remove,
+};
+
+MODULE_AUTHOR("Sowjanya Komatineni <skomatineni@xxxxxxxxxx>");
+MODULE_DESCRIPTION("NVIDIA Tegra Video Input Device Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/media/tegra/tegra-vi.h b/drivers/staging/media/tegra/tegra-vi.h
new file mode 100644
index 0000000..d639b36
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-vi.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#ifndef __TEGRA_VI_H__
+#define __TEGRA_VI_H__
+
+#include <linux/host1x.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/videodev2.h>
+
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "tegra-common.h"
+
+/**
+ * struct tegra_vi_ops - Tegra VI operations
+ * @vi_start_streaming: starts media pipeline, subdevice streaming, sets up
+ * VI for capture and runs capture start and capture finish
+ * kthreads for capturing frames to buffer and returns them back.
+ * @vi_stop_streaming: stops media pipeline and subdevice streaming and returns
+ * back any queued buffers.
+ */
+struct tegra_vi_ops {
+ int (*vi_start_streaming)(struct vb2_queue *vq, u32 count);
+ void (*vi_stop_streaming)(struct vb2_queue *vq);
+};
+
+/**
+ * struct tegra_vi_soc - NVIDIA Tegra Video Input SoC structure
+ *
+ * @video_formats: supported video formats
+ * @nformats: total video formats
+ * @ops: vi operations
+ * @hw_revision: VI hw_revision
+ * @vi_max_channels: supported max streaming channels
+ * @vi_max_clk_hz: VI clock max frequency
+ */
+struct tegra_vi_soc {
+ const struct tegra_video_format *video_formats;
+ const unsigned int nformats;
+ const struct tegra_vi_ops *ops;
+ u32 hw_revision;
+ unsigned int vi_max_channels;
+ unsigned int vi_max_clk_hz;
+};
+
+/**
+ * struct tegra_vi - NVIDIA Tegra Video Input device structure
+ *
+ * @dev: device struct
+ * @client: host1x_client struct
+ * @iomem: register base
+ * @vi_clk: main clock for VI block
+ * @vi_reg: regulator for VI hardware, normally it avdd_dsi_csi
+ * @soc: pointer to SoC data structure
+ * @ops: vi operations
+ * @vi_chans: list head for VI channels
+ */
+struct tegra_vi {
+ struct device *dev;
+ struct host1x_client client;
+ void __iomem *iomem;
+ struct clk *vi_clk;
+ struct regulator *vi_reg;
+ const struct tegra_vi_soc *soc;
+ const struct tegra_vi_ops *ops;
+ struct list_head vi_chans;
+};
+
+void tegra210_vi_stop_streaming(struct vb2_queue *vq);
+int tegra210_vi_start_streaming(struct vb2_queue *vq, u32 count);
+
+#endif /* __TEGRA_VI_H__ */
diff --git a/drivers/staging/media/tegra/tegra-video.c b/drivers/staging/media/tegra/tegra-video.c
new file mode 100644
index 0000000..5101156
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-video.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/host1x.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include "tegra-video.h"
+
+static void tegra_v4l2_dev_release(struct v4l2_device *v4l2_dev)
+{
+ struct tegra_video_device *vid;
+
+ vid = container_of(v4l2_dev, struct tegra_video_device, v4l2_dev);
+ v4l2_device_unregister(v4l2_dev);
+ kfree(vid);
+}
+
+static int host1x_video_probe(struct host1x_device *dev)
+{
+ struct tegra_video_device *vid;
+ int ret;
+
+ vid = kzalloc(sizeof(*vid), GFP_KERNEL);
+ if (!vid)
+ return -ENOMEM;
+
+ vid->media_dev.dev = get_device(&dev->dev);
+ strscpy(vid->media_dev.model, "NVIDIA Tegra Video Input Device",
+ sizeof(vid->media_dev.model));
+
+ media_device_init(&vid->media_dev);
+ ret = media_device_register(&vid->media_dev);
+ if (ret < 0) {
+ dev_err(vid->media_dev.dev,
+ "failed to register media device: %d\n", ret);
+ goto err_kfree;
+ }
+
+ vid->v4l2_dev.mdev = &vid->media_dev;
+ vid->v4l2_dev.release = tegra_v4l2_dev_release;
+ dev_set_drvdata(&dev->dev, vid);
+ ret = v4l2_device_register(vid->media_dev.dev, &vid->v4l2_dev);
+ if (ret < 0) {
+ dev_err(vid->media_dev.dev,
+ "V4L2 device registration failed: %d\n", ret);
+ goto clean_media;
+ }
+
+ ret = host1x_device_init(dev);
+ if (ret < 0)
+ goto unregister_v4l2;
+
+ return 0;
+
+unregister_v4l2:
+ v4l2_device_unregister(&vid->v4l2_dev);
+clean_media:
+ media_device_unregister(&vid->media_dev);
+ media_device_cleanup(&vid->media_dev);
+err_kfree:
+ kfree(vid);
+ return ret;
+}
+
+static int host1x_video_remove(struct host1x_device *dev)
+{
+ struct tegra_video_device *vid = dev_get_drvdata(&dev->dev);
+
+ host1x_device_exit(dev);
+ media_device_unregister(&vid->media_dev);
+ media_device_cleanup(&vid->media_dev);
+ v4l2_device_disconnect(&vid->v4l2_dev);
+ v4l2_device_put(&vid->v4l2_dev);
+ return 0;
+}
+
+static const struct of_device_id host1x_video_subdevs[] = {
+ { .compatible = "nvidia,tegra210-csi", },
+ { .compatible = "nvidia,tegra210-vi", },
+ { }
+};
+
+static struct host1x_driver host1x_video_driver = {
+ .driver = {
+ .name = "tegra-video",
+ },
+ .probe = host1x_video_probe,
+ .remove = host1x_video_remove,
+ .subdevs = host1x_video_subdevs,
+};
+
+static struct platform_driver * const drivers[] = {
+ &tegra_csi_driver,
+ &tegra_vi_driver,
+};
+
+static int __init host1x_video_init(void)
+{
+ int err;
+
+ err = host1x_driver_register(&host1x_video_driver);
+ if (err < 0)
+ return err;
+
+ err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
+ if (err < 0)
+ goto unregister_host1x;
+
+ return 0;
+
+unregister_host1x:
+ host1x_driver_unregister(&host1x_video_driver);
+ return err;
+}
+module_init(host1x_video_init);
+
+static void __exit host1x_video_exit(void)
+{
+ platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
+ host1x_driver_unregister(&host1x_video_driver);
+}
+module_exit(host1x_video_exit);
+
+MODULE_AUTHOR("Sowjanya Komatineni <skomatineni@xxxxxxxxxx>");
+MODULE_DESCRIPTION("NVIDIA Tegra Host1x Video driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/media/tegra/tegra-video.h b/drivers/staging/media/tegra/tegra-video.h
new file mode 100644
index 0000000..1e2ae64
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra-video.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#ifndef __TEGRA_VIDEO_H__
+#define __TEGRA_VIDEO_H__
+
+#include <linux/host1x.h>
+
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "tegra-vi.h"
+#include "tegra-csi.h"
+
+struct tegra_video_device {
+ struct v4l2_device v4l2_dev;
+ struct media_device media_dev;
+ struct tegra_vi *vi;
+ struct tegra_csi *csi;
+};
+
+extern struct platform_driver tegra_vi_driver;
+extern struct platform_driver tegra_csi_driver;
+
+#endif
diff --git a/drivers/staging/media/tegra/tegra210.c b/drivers/staging/media/tegra/tegra210.c
new file mode 100644
index 0000000..a87cedd
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra210.c
@@ -0,0 +1,754 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+/*
+ * This source file contains both VI and CSI specific operations and
+ * registers accessors.
+ */
+#include <linux/clk.h>
+#include <linux/clk/tegra.h>
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/completion.h>
+
+#include "tegra-common.h"
+#include "tegra-csi.h"
+#include "tegra-vi.h"
+#include "tegra210.h"
+
+#define TEGRA210_CSI_PORT_OFFSET 0x34
+#define TEGRA210_CSI_CIL_OFFSET 0x0f4
+#define TEGRA210_CSI_TPG_OFFSET 0x18c
+
+#define CSI_PP_OFFSET(block) ((block) * 0x800)
+#define TEGRA210_VI_CSI_BASE(x) (0x100 + (x) * 0x100)
+
+/* Tegra210 VI registers accessors */
+static void tegra_vi_write(struct tegra_vi_channel *chan, unsigned int addr,
+ u32 val)
+{
+ writel(val, chan->vi->iomem + addr);
+}
+
+static u32 tegra_vi_read(struct tegra_vi_channel *chan, unsigned int addr)
+{
+ return readl(chan->vi->iomem + addr);
+}
+
+/* Tegra210 VI_CSI registers accessors */
+static void vi_csi_write(struct tegra_vi_channel *chan, unsigned int addr,
+ u32 val)
+{
+ void __iomem *vi_csi_base;
+
+ vi_csi_base = chan->vi->iomem + TEGRA210_VI_CSI_BASE(chan->portno);
+
+ writel(val, vi_csi_base + addr);
+}
+
+static u32 vi_csi_read(struct tegra_vi_channel *chan, unsigned int addr)
+{
+ void __iomem *vi_csi_base;
+
+ vi_csi_base = chan->vi->iomem + TEGRA210_VI_CSI_BASE(chan->portno);
+
+ return readl(vi_csi_base + addr);
+}
+
+/*
+ * Tegra210 VI channel capture operations
+ */
+static int tegra_channel_capture_setup(struct tegra_vi_channel *chan)
+{
+ u32 height = chan->format.height;
+ u32 width = chan->format.width;
+ u32 format = chan->fmtinfo->img_fmt;
+ u32 data_type = chan->fmtinfo->img_dt;
+ u32 word_count = (width * chan->fmtinfo->bit_width) / 8;
+
+ vi_csi_write(chan, TEGRA_VI_CSI_ERROR_STATUS, 0xFFFFFFFF);
+ vi_csi_write(chan, TEGRA_VI_CSI_IMAGE_DEF,
+ ((chan->pg_mode ? 0 : 1) << BYPASS_PXL_TRANSFORM_OFFSET) |
+ (format << IMAGE_DEF_FORMAT_OFFSET) |
+ IMAGE_DEF_DEST_MEM);
+ vi_csi_write(chan, TEGRA_VI_CSI_IMAGE_DT, data_type);
+ vi_csi_write(chan, TEGRA_VI_CSI_IMAGE_SIZE_WC, word_count);
+ vi_csi_write(chan, TEGRA_VI_CSI_IMAGE_SIZE,
+ (height << IMAGE_SIZE_HEIGHT_OFFSET) | width);
+ return 0;
+}
+
+static void tegra_channel_vi_soft_reset(struct tegra_vi_channel *chan)
+{
+ /* disable clock gating to enable continuous clock */
+ tegra_vi_write(chan, TEGRA_VI_CFG_CG_CTRL, 0);
+ /*
+ * Soft reset memory client interface, pixel format logic, sensor
+ * control logic, and a shadow copy logic to bring VI to clean state.
+ */
+ vi_csi_write(chan, TEGRA_VI_CSI_SW_RESET, 0xF);
+ usleep_range(100, 200);
+ vi_csi_write(chan, TEGRA_VI_CSI_SW_RESET, 0x0);
+
+ /* enable back VI clock gating */
+ tegra_vi_write(chan, TEGRA_VI_CFG_CG_CTRL, VI_CG_2ND_LEVEL_EN);
+}
+
+static void tegra_channel_capture_error_recover(struct tegra_vi_channel *chan)
+{
+ u32 val;
+
+ /*
+ * Recover VI and CSI hardware blocks incase of missing frame start
+ * events due to source not streaming or noisy csi inputs from the
+ * external source or many outstanding frame start or MW_ACK_DONE
+ * events which can cause CSI and VI hardware hang.
+ * This helps to have a clean capture for next frame.
+ */
+ val = vi_csi_read(chan, TEGRA_VI_CSI_ERROR_STATUS);
+ dev_dbg(&chan->video->dev, "TEGRA_VI_CSI_ERROR_STATUS 0x%08x\n", val);
+ vi_csi_write(chan, TEGRA_VI_CSI_ERROR_STATUS, val);
+
+ val = tegra_vi_read(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT_ERROR);
+ dev_dbg(&chan->video->dev,
+ "TEGRA_VI_CFG_VI_INCR_SYNCPT_ERROR 0x%08x\n", val);
+ tegra_vi_write(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT_ERROR, val);
+
+ /* disable the stream */
+ tegra_channel_set_stream(chan, false);
+
+ /* recover VI and CSI blocks by issuing software reset */
+ tegra_channel_csi_error_recover(chan);
+ tegra_channel_vi_soft_reset(chan);
+
+ /* re-init VI and enable back the stream */
+ tegra_channel_capture_setup(chan);
+ tegra_channel_set_stream(chan, true);
+}
+
+static struct tegra_channel_buffer *
+dequeue_buf_done(struct tegra_vi_channel *chan)
+{
+ struct tegra_channel_buffer *buf = NULL;
+
+ spin_lock(&chan->done_lock);
+ if (list_empty(&chan->done)) {
+ spin_unlock(&chan->done_lock);
+ return NULL;
+ }
+
+ buf = list_entry(chan->done.next, struct tegra_channel_buffer,
+ queue);
+ if (buf)
+ list_del_init(&buf->queue);
+
+ spin_unlock(&chan->done_lock);
+
+ return buf;
+}
+
+static void release_buffer(struct tegra_vi_channel *chan,
+ struct tegra_channel_buffer *buf,
+ enum vb2_buffer_state state)
+{
+ struct vb2_v4l2_buffer *vb = &buf->buf;
+
+ vb->sequence = chan->sequence++;
+ vb->field = V4L2_FIELD_NONE;
+ vb->vb2_buf.timestamp = ktime_get_ns();
+ vb2_buffer_done(&vb->vb2_buf, state);
+}
+
+static int tegra_channel_capture_frame(struct tegra_vi_channel *chan,
+ struct tegra_channel_buffer *buf)
+{
+ int err = 0;
+ u32 thresh, value, frame_start, mw_ack_done;
+ int bytes_per_line = chan->format.bytesperline;
+
+ /* program buffer address by using surface 0 */
+ vi_csi_write(chan, TEGRA_VI_CSI_SURFACE0_OFFSET_MSB,
+ (u64)buf->addr >> 32);
+ vi_csi_write(chan, TEGRA_VI_CSI_SURFACE0_OFFSET_LSB, buf->addr);
+ vi_csi_write(chan, TEGRA_VI_CSI_SURFACE0_STRIDE, bytes_per_line);
+
+ /*
+ * Tegra VI block interacts with host1x syncpt for synchronizing
+ * programmed condition of capture state and hardware operation.
+ * Frame start and Memory write acknowledge syncpts has their own
+ * FIFO of depth 2.
+ *
+ * Syncpoint trigger conditions set through VI_INCR_SYNCPT register
+ * are added to HW syncpt FIFO and when the HW triggers, syncpt
+ * condition is removed from the FIFO and counter at syncpoint index
+ * will be incremented by the hardware and software can wait for
+ * counter to reach threshold to synchronize capturing frame with the
+ * hardware capture events.
+ */
+
+ /* increase channel syncpoint threshold for FRAME_START */
+ thresh = host1x_syncpt_incr_max(chan->frame_start_sp, 1);
+
+ /* Program FRAME_START trigger condition syncpt request */
+ frame_start = VI_CSI_PP_FRAME_START(chan->portno);
+ value = VI_CFG_VI_INCR_SYNCPT_COND(frame_start) |
+ host1x_syncpt_id(chan->frame_start_sp);
+ tegra_vi_write(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT, value);
+
+ /* increase channel syncpoint threshold for MW_ACK_DONE */
+ buf->mw_ack_sp_thresh = host1x_syncpt_incr_max(chan->mw_ack_sp, 1);
+
+ /* Program MW_ACK_DONE trigger condition syncpt request */
+ mw_ack_done = VI_CSI_MW_ACK_DONE(chan->portno);
+ value = VI_CFG_VI_INCR_SYNCPT_COND(mw_ack_done) |
+ host1x_syncpt_id(chan->mw_ack_sp);
+ tegra_vi_write(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT, value);
+
+ /* enable single shot capture */
+ vi_csi_write(chan, TEGRA_VI_CSI_SINGLE_SHOT, SINGLE_SHOT_CAPTURE);
+ chan->capture_reqs++;
+
+ /* wait for syncpt counter to reach frame start event threshold */
+ err = host1x_syncpt_wait(chan->frame_start_sp, thresh,
+ TEGRA_VI_SYNCPT_WAIT_TIMEOUT, &value);
+ if (err) {
+ dev_err(&chan->video->dev,
+ "frame start syncpt timeout: %d\n", err);
+ /* increment syncpoint counter for timedout events */
+ host1x_syncpt_incr(chan->frame_start_sp);
+ spin_lock(&chan->sp_incr_lock);
+ host1x_syncpt_incr(chan->mw_ack_sp);
+ spin_unlock(&chan->sp_incr_lock);
+ /* clear errors and recover */
+ tegra_channel_capture_error_recover(chan);
+ release_buffer(chan, buf, VB2_BUF_STATE_ERROR);
+ return err;
+ }
+
+ /* move buffer to capture done queue */
+ spin_lock(&chan->done_lock);
+ list_add_tail(&buf->queue, &chan->done);
+ spin_unlock(&chan->done_lock);
+
+ /* wait up kthread for capture done */
+ wake_up_interruptible(&chan->done_wait);
+
+ return 0;
+}
+
+static void tegra_channel_capture_done(struct tegra_vi_channel *chan,
+ struct tegra_channel_buffer *buf)
+{
+ enum vb2_buffer_state state = VB2_BUF_STATE_DONE;
+ u32 value;
+ int ret;
+
+ /* wait for syncpt counter to reach MW_ACK_DONE event threshold */
+ ret = host1x_syncpt_wait(chan->mw_ack_sp, buf->mw_ack_sp_thresh,
+ TEGRA_VI_SYNCPT_WAIT_TIMEOUT, &value);
+ if (ret) {
+ dev_err(&chan->video->dev,
+ "MW_ACK_DONE syncpt timeout: %d\n", ret);
+ state = VB2_BUF_STATE_ERROR;
+ /* increment syncpoint counter for timedout event */
+ spin_lock(&chan->sp_incr_lock);
+ host1x_syncpt_incr(chan->mw_ack_sp);
+ spin_unlock(&chan->sp_incr_lock);
+ }
+
+ release_buffer(chan, buf, state);
+}
+
+static int chan_capture_kthread_start(void *data)
+{
+ struct tegra_vi_channel *chan = data;
+ struct tegra_channel_buffer *buf;
+ int err = 0;
+ int caps_inflight;
+
+ set_freezable();
+
+ while (1) {
+ try_to_freeze();
+
+ wait_event_interruptible(chan->start_wait,
+ !list_empty(&chan->capture) ||
+ kthread_should_stop());
+ /*
+ * Frame start and MW_ACK_DONE syncpoint condition FIFOs are
+ * of max depth 2. So make sure max 2 capture requests are
+ * in process by the hardware at a time.
+ */
+ while (!(kthread_should_stop() || list_empty(&chan->capture))) {
+ caps_inflight = chan->capture_reqs - chan->sequence;
+ /*
+ * Source is not streaming if error is non-zero.
+ * So, do not DeQueue buffers on capture error or when

DeQueue -> dequeue

+ * syncpoint requests in FIFO are full.
+ */
+ if (err || caps_inflight >= SYNCPT_FIFO_DEPTH)
+ break;
+
+ /* dequeue the buffer and start capture */
+ spin_lock(&chan->start_lock);
+ if (list_empty(&chan->capture))
+ break;
+ buf = list_entry(chan->capture.next,
+ struct tegra_channel_buffer, queue);
+ list_del_init(&buf->queue);
+ spin_unlock(&chan->start_lock);
+
+ err = tegra_channel_capture_frame(chan, buf);
+ if (err)
+ vb2_queue_error(&chan->queue);
+ }
+
+ if (kthread_should_stop())
+ break;
+ }
+
+ return 0;
+}
+
+static int chan_capture_kthread_finish(void *data)
+{
+ struct tegra_vi_channel *chan = data;
+ struct tegra_channel_buffer *buf;
+
+ set_freezable();
+
+ while (1) {
+ try_to_freeze();
+
+ wait_event_interruptible(chan->done_wait,
+ !list_empty(&chan->done) ||
+ kthread_should_stop());
+ /* dequeue buffers and finish capture */
+ buf = dequeue_buf_done(chan);
+ while (buf) {
+ tegra_channel_capture_done(chan, buf);
+ buf = dequeue_buf_done(chan);
+ }
+
+ if (kthread_should_stop())
+ break;
+ }
+
+ return 0;
+}
+
+int tegra210_vi_start_streaming(struct vb2_queue *vq, u32 count)
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
+ struct media_pipeline *pipe = &chan->video->pipe;
+ int ret;
+
+ tegra_vi_write(chan, TEGRA_VI_CFG_CG_CTRL, VI_CG_2ND_LEVEL_EN);
+
+ /* clear errors */
+ vi_csi_write(chan, TEGRA_VI_CSI_ERROR_STATUS, 0xFFFFFFFF);
+
+ /*
+ * Sync point FIFO full stalls the host interface.
+ * Setting NO_STALL will drop INCR_SYNCPT methods when fifos are
+ * full and the corresponding condition bits in INCR_SYNCPT_ERROR
+ * register will be set.
+ * This allows SW to process error recovery.
+ */
+ tegra_vi_write(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT_CNTRL,
+ TEGRA_VI_CFG_VI_INCR_SYNCPT_NO_STALL);
+
+ /* start the pipeline */
+ ret = media_pipeline_start(&chan->video->entity, pipe);
+ if (ret < 0)
+ goto error_pipeline_start;
+
+ tegra_channel_capture_setup(chan);
+ ret = tegra_channel_set_stream(chan, true);
+ if (ret < 0)
+ goto error_set_stream;
+
+ chan->capture_reqs = 0;
+ chan->sequence = 0;
+
+ /* start kthreads to capture data to buffer and return them */
+ chan->kthread_start_capture = kthread_run(chan_capture_kthread_start,
+ chan, "%s:0",
+ chan->video->name);
+ if (IS_ERR(chan->kthread_start_capture)) {
+ ret = PTR_ERR(chan->kthread_start_capture);
+ chan->kthread_start_capture = NULL;
+ dev_err(&chan->video->dev,
+ "failed to run capture start kthread: %d\n", ret);
+ goto error_kthread_start;
+ }
+
+ chan->kthread_finish_capture = kthread_run(chan_capture_kthread_finish,
+ chan, "%s:1",
+ chan->video->name);
+ if (IS_ERR(chan->kthread_finish_capture)) {
+ ret = PTR_ERR(chan->kthread_finish_capture);
+ chan->kthread_finish_capture = NULL;
+ dev_err(&chan->video->dev,
+ "failed to run capture finish kthread: %d\n", ret);
+ goto error_kthread_done;
+ }
+
+ return 0;
+
+error_kthread_done:
+ kthread_stop(chan->kthread_start_capture);
+error_kthread_start:
+ tegra_channel_set_stream(chan, false);
+error_set_stream:
+ media_pipeline_stop(&chan->video->entity);
+error_pipeline_start:
+ vq->start_streaming_called = 0;
+ tegra_channel_release_buffers(chan, VB2_BUF_STATE_QUEUED);
+ return ret;
+}
+
+void tegra210_vi_stop_streaming(struct vb2_queue *vq)
+{
+ struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
+
+ if (chan->kthread_start_capture) {
+ kthread_stop(chan->kthread_start_capture);
+ chan->kthread_start_capture = NULL;
+ }
+
+ if (chan->kthread_finish_capture) {
+ kthread_stop(chan->kthread_finish_capture);
+ chan->kthread_finish_capture = NULL;
+ }
+
+ tegra_channel_release_buffers(chan, VB2_BUF_STATE_ERROR);
+ tegra_channel_set_stream(chan, false);
+ media_pipeline_stop(&chan->video->entity);
+}
+
+/* Tegra210 CSI PHY registers accessors */
+static void csi_write(struct tegra_csi *csi, u8 portno, unsigned int addr,
+ u32 val)
+{
+ void __iomem *csi_pp_base;
+
+ csi_pp_base = csi->iomem + CSI_PP_OFFSET(portno >> 1);
+
+ writel(val, csi_pp_base + addr);
+}
+
+/* Tegra210 CSI Pixel parser registers accessors */
+static void pp_write(struct tegra_csi *csi, u8 portno, u32 addr, u32 val)
+{
+ void __iomem *csi_pp_base;
+ unsigned int offset;
+
+ csi_pp_base = csi->iomem + CSI_PP_OFFSET(portno >> 1);
+ offset = (portno % CSI_PORTS_PER_BRICK) * TEGRA210_CSI_PORT_OFFSET;
+
+ writel(val, csi_pp_base + offset + addr);
+}
+
+static u32 pp_read(struct tegra_csi *csi, u8 portno, u32 addr)
+{
+ void __iomem *csi_pp_base;
+ unsigned int offset;
+
+ csi_pp_base = csi->iomem + CSI_PP_OFFSET(portno >> 1);
+ offset = (portno % CSI_PORTS_PER_BRICK) * TEGRA210_CSI_PORT_OFFSET;
+
+ return readl(csi_pp_base + offset + addr);
+}
+
+/* Tegra210 CSI CIL A/B port registers accessors */
+static void cil_write(struct tegra_csi *csi, u8 portno, u32 addr, u32 val)
+{
+ void __iomem *csi_cil_base;
+ unsigned int offset;
+
+ csi_cil_base = csi->iomem + CSI_PP_OFFSET(portno >> 1) +
+ TEGRA210_CSI_CIL_OFFSET;
+ offset = (portno % CSI_PORTS_PER_BRICK) * TEGRA210_CSI_PORT_OFFSET;
+
+ writel(val, csi_cil_base + offset + addr);
+}
+
+static u32 cil_read(struct tegra_csi *csi, u8 portno, u32 addr)
+{
+ void __iomem *csi_cil_base;
+ unsigned int offset;
+
+ csi_cil_base = csi->iomem + CSI_PP_OFFSET(portno >> 1) +
+ TEGRA210_CSI_CIL_OFFSET;
+ offset = (portno % CSI_PORTS_PER_BRICK) * TEGRA210_CSI_PORT_OFFSET;
+
+ return readl(csi_cil_base + offset + addr);
+}
+
+/* Tegra210 CSI Test pattern generator registers accessor */
+static void tpg_write(struct tegra_csi *csi, u8 portno, unsigned int addr,
+ u32 val)
+{
+ void __iomem *csi_pp_base;
+ unsigned int offset;
+
+ csi_pp_base = csi->iomem + CSI_PP_OFFSET(portno >> 1);
+ offset = (portno % CSI_PORTS_PER_BRICK) * TEGRA210_CSI_PORT_OFFSET +
+ TEGRA210_CSI_TPG_OFFSET;
+
+ writel(val, csi_pp_base + offset + addr);
+}
+
+/*
+ * Tegra210 CSI operations
+ */
+void tegra210_csi_error_recover(struct tegra_csi_channel *csi_chan)
+{
+ struct tegra_csi *csi = csi_chan->csi;
+ unsigned int port_num = csi_chan->csi_port_num;
+ u32 val;
+
+ /*
+ * Recover CSI hardware in case of capture errors by issuing
+ * software reset to CSICIL sensor, pixel parser, and clear errors
+ * to have clean capture on next streaming.
+ */
+ val = pp_read(csi, port_num, TEGRA_CSI_PIXEL_PARSER_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_PIXEL_PARSER_STATUS 0x%08x\n", val);
+
+ val = cil_read(csi, port_num, TEGRA_CSI_CIL_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_CIL_STATUS 0x%08x\n", val);
+
+ val = cil_read(csi, port_num, TEGRA_CSI_CILX_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_CILX_STATUS 0x%08x\n", val);
+
+ if (csi_chan->numlanes == 4) {
+ /* reset CSI CIL sensor */
+ cil_write(csi, port_num, TEGRA_CSI_CIL_SW_SENSOR_RESET, 0x1);
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_SW_SENSOR_RESET, 0x1);
+ /*
+ * SW_STATUS_RESET resets all status bits of PPA, PPB, CILA,
+ * CILB status registers and debug counters.
+ * So, SW_STATUS_RESET can be used only when CSI Brick is in
+ * x4 mode.
+ */
+ csi_write(csi, port_num, TEGRA_CSI_CSI_SW_STATUS_RESET, 0x1);
+
+ /* sleep for 20 clock cycles to drain the FIFO */
+ usleep_range(10, 20);
+
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_SW_SENSOR_RESET, 0x0);
+ cil_write(csi, port_num, TEGRA_CSI_CIL_SW_SENSOR_RESET, 0x0);
+ csi_write(csi, port_num, TEGRA_CSI_CSI_SW_STATUS_RESET, 0x0);
+ } else {
+ /* reset CSICIL sensor */
+ cil_write(csi, port_num, TEGRA_CSI_CIL_SW_SENSOR_RESET, 0x1);
+ usleep_range(10, 20);
+ cil_write(csi, port_num, TEGRA_CSI_CIL_SW_SENSOR_RESET, 0x0);
+
+ /* clear the errors */
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_PARSER_STATUS,
+ 0xFFFFFFFF);

0xFFFFFFFF -> 0xffffffff

Hex numbers are lowercase in the kernel (as much as possible, in any case).
Same for the other instances in this driver.

+ cil_write(csi, port_num, TEGRA_CSI_CIL_STATUS, 0xFFFFFFFF);
+ cil_write(csi, port_num, TEGRA_CSI_CILX_STATUS, 0xFFFFFFFF);
+ }
+}
+
+int tegra210_csi_streaming(struct tegra_csi_channel *csi_chan, u8 pg_mode,
+ int enable)
+{
+ struct tegra_csi *csi = csi_chan->csi;
+ unsigned int port_num = csi_chan->csi_port_num;
+
+ if (enable) {
+ csi_write(csi, port_num, TEGRA_CSI_CLKEN_OVERRIDE, 0);
+
+ /* clean up status */
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_PARSER_STATUS,
+ 0xFFFFFFFF);
+ cil_write(csi, port_num, TEGRA_CSI_CIL_STATUS, 0xFFFFFFFF);
+ cil_write(csi, port_num, TEGRA_CSI_CILX_STATUS, 0xFFFFFFFF);
+ cil_write(csi, port_num, TEGRA_CSI_CIL_INTERRUPT_MASK, 0x0);
+
+ /* CIL PHY registers setup */
+ cil_write(csi, port_num, TEGRA_CSI_CIL_PAD_CONFIG0, 0x0);
+ cil_write(csi, port_num, TEGRA_CSI_CIL_PHY_CONTROL, 0xA);
+
+ /*
+ * The CSI unit provides for connection of up to six cameras in
+ * the system and is organized as three identical instances of
+ * two MIPI support blocks, each with a separate 4-lane
+ * interface that can be configured as a single camera with 4
+ * lanes or as a dual camera with 2 lanes available for each
+ * camera.
+ */
+ if (csi_chan->numlanes == 4) {
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_STATUS, 0xFFFFFFFF);
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CILX_STATUS, 0xFFFFFFFF);
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_INTERRUPT_MASK, 0x0);
+
+ cil_write(csi, port_num,
+ TEGRA_CSI_CIL_PAD_CONFIG0, BRICK_CLOCK_A_4X);
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_PAD_CONFIG0, 0x0);
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_INTERRUPT_MASK, 0x0);
+ cil_write(csi, port_num + 1,
+ TEGRA_CSI_CIL_PHY_CONTROL, 0xA);
+ csi_write(csi, port_num, TEGRA_CSI_PHY_CIL_COMMAND,
+ CSI_A_PHY_CIL_ENABLE | CSI_B_PHY_CIL_ENABLE);
+ } else {
+ u32 val = ((port_num & 1) == PORT_A) ?
+ CSI_A_PHY_CIL_ENABLE | CSI_B_PHY_CIL_NOP :
+ CSI_B_PHY_CIL_ENABLE | CSI_A_PHY_CIL_NOP;
+ csi_write(csi, port_num, TEGRA_CSI_PHY_CIL_COMMAND,
+ val);
+ }
+
+ /* CSI pixel parser registers setup */
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_PP_COMMAND,
+ (0xF << CSI_PP_START_MARKER_FRAME_MAX_OFFSET) |
+ CSI_PP_SINGLE_SHOT_ENABLE | CSI_PP_RST);
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_PARSER_INTERRUPT_MASK,
+ 0x0);
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_CONTROL0,
+ CSI_PP_PACKET_HEADER_SENT |
+ CSI_PP_DATA_IDENTIFIER_ENABLE |
+ CSI_PP_WORD_COUNT_SELECT_HEADER |
+ CSI_PP_CRC_CHECK_ENABLE | CSI_PP_WC_CHECK |
+ CSI_PP_OUTPUT_FORMAT_STORE | CSI_PPA_PAD_LINE_NOPAD |
+ CSI_PP_HEADER_EC_DISABLE | CSI_PPA_PAD_FRAME_NOPAD |
+ (port_num & 1));
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_CONTROL1,
+ (0x1 << CSI_PP_TOP_FIELD_FRAME_OFFSET) |
+ (0x1 << CSI_PP_TOP_FIELD_FRAME_MASK_OFFSET));
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_GAP,
+ 0x14 << PP_FRAME_MIN_GAP_OFFSET);
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_EXPECTED_FRAME,
+ 0x0);
+ pp_write(csi, port_num, TEGRA_CSI_INPUT_STREAM_CONTROL,
+ (0x3f << CSI_SKIP_PACKET_THRESHOLD_OFFSET) |
+ (csi_chan->numlanes - 1));
+
+ /* TPG setup */
+ if (pg_mode) {
+ tpg_write(csi, port_num,
+ TEGRA_CSI_PATTERN_GENERATOR_CTRL,
+ ((pg_mode - 1) << PG_MODE_OFFSET) |
+ PG_ENABLE);
+ tpg_write(csi, port_num, TEGRA_CSI_PG_BLANK,
+ 8 << PG_VBLANK_OFFSET | 512);
+ tpg_write(csi, port_num, TEGRA_CSI_PG_PHASE, 0x0);
+ tpg_write(csi, port_num, TEGRA_CSI_PG_RED_FREQ,
+ (0x10 << PG_RED_VERT_INIT_FREQ_OFFSET) |
+ (0x10 << PG_RED_HOR_INIT_FREQ_OFFSET));
+ tpg_write(csi, port_num, TEGRA_CSI_PG_RED_FREQ_RATE,
+ 0x0);
+ tpg_write(csi, port_num, TEGRA_CSI_PG_GREEN_FREQ,
+ (0x10 << PG_GREEN_VERT_INIT_FREQ_OFFSET) |
+ (0x10 << PG_GREEN_HOR_INIT_FREQ_OFFSET));
+ tpg_write(csi, port_num, TEGRA_CSI_PG_GREEN_FREQ_RATE,
+ 0x0);
+ tpg_write(csi, port_num, TEGRA_CSI_PG_BLUE_FREQ,
+ (0x10 << PG_BLUE_VERT_INIT_FREQ_OFFSET) |
+ (0x10 << PG_BLUE_HOR_INIT_FREQ_OFFSET));
+ tpg_write(csi, port_num, TEGRA_CSI_PG_BLUE_FREQ_RATE,
+ 0x0);
+ }
+
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_PP_COMMAND,
+ (0xF << CSI_PP_START_MARKER_FRAME_MAX_OFFSET) |
+ CSI_PP_SINGLE_SHOT_ENABLE | CSI_PP_ENABLE);
+ } else {
+ u32 val = pp_read(csi, port_num,
+ TEGRA_CSI_PIXEL_PARSER_STATUS);
+
+ dev_dbg(csi->dev, "TEGRA_CSI_PIXEL_PARSER_STATUS 0x%08x\n",
+ val);
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_PARSER_STATUS, val);
+
+ val = cil_read(csi, port_num, TEGRA_CSI_CIL_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_CIL_STATUS 0x%08x\n", val);
+ cil_write(csi, port_num, TEGRA_CSI_CIL_STATUS, val);
+
+ val = cil_read(csi, port_num, TEGRA_CSI_CILX_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_CILX_STATUS 0x%08x\n", val);
+ cil_write(csi, port_num, TEGRA_CSI_CILX_STATUS, val);
+
+ pp_write(csi, port_num, TEGRA_CSI_PIXEL_STREAM_PP_COMMAND,
+ (0xF << CSI_PP_START_MARKER_FRAME_MAX_OFFSET) |
+ CSI_PP_DISABLE);
+
+ if (pg_mode) {
+ tpg_write(csi, port_num,
+ TEGRA_CSI_PATTERN_GENERATOR_CTRL,
+ PG_DISABLE);
+ return 0;
+ }
+
+ if (csi_chan->numlanes == 4) {
+ csi_write(csi, port_num, TEGRA_CSI_PHY_CIL_COMMAND,
+ CSI_A_PHY_CIL_DISABLE |
+ CSI_B_PHY_CIL_DISABLE);
+
+ } else {
+ u32 val = ((port_num & 1) == PORT_A) ?
+ CSI_A_PHY_CIL_DISABLE | CSI_B_PHY_CIL_NOP :
+ CSI_B_PHY_CIL_DISABLE | CSI_A_PHY_CIL_NOP;
+ csi_write(csi, port_num, TEGRA_CSI_PHY_CIL_COMMAND,
+ val);
+ }
+ }
+
+ return 0;
+}
+
+int tegra210_csi_hw_init(struct tegra_csi *csi)
+{
+ int ret;
+
+ csi->csi_clk = devm_clk_get(csi->dev, "csi");
+ if (IS_ERR(csi->csi_clk)) {
+ ret = PTR_ERR(csi->csi_clk);
+ dev_err(csi->dev, "failed to get csi clock: %d\n", ret);
+ return ret;
+ }
+
+ csi->tpg_clk = devm_clk_get(csi->dev, "csi_tpg");
+ if (IS_ERR(csi->tpg_clk)) {
+ ret = PTR_ERR(csi->tpg_clk);
+ dev_err(csi->dev, "failed to get csi_tpg clock: %d\n", ret);
+ return ret;
+ }
+
+ csi->cilab_clk = devm_clk_get(csi->dev, "cilab");
+ if (IS_ERR(csi->cilab_clk)) {
+ ret = PTR_ERR(csi->cilab_clk);
+ dev_err(csi->dev, "failed to get cilab clock: %d\n", ret);
+ return ret;
+ }
+
+ csi->cilcd_clk = devm_clk_get(csi->dev, "cilcd");
+ if (IS_ERR(csi->cilcd_clk)) {
+ ret = PTR_ERR(csi->cilcd_clk);
+ dev_err(csi->dev, "failed to get cilcd clock: %d\n", ret);
+ return ret;
+ }
+
+ csi->cilef_clk = devm_clk_get(csi->dev, "cile");
+ if (IS_ERR(csi->cilef_clk)) {
+ ret = PTR_ERR(csi->cilef_clk);
+ dev_err(csi->dev, "failed to get cile clock: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/drivers/staging/media/tegra/tegra210.h b/drivers/staging/media/tegra/tegra210.h
new file mode 100644
index 0000000..5f698ec
--- /dev/null
+++ b/drivers/staging/media/tegra/tegra210.h
@@ -0,0 +1,192 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
+ */
+
+#ifndef __TEGRA210_H__
+#define __TEGRA210_H__
+
+/* Tegra210 VI registers */
+#define TEGRA_VI_SYNCPT_WAIT_TIMEOUT msecs_to_jiffies(200)
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT 0x000
+#define VI_CFG_VI_INCR_SYNCPT_COND(x) (((x) & 0xff) << 8)
+#define VI_CSI_PP_LINE_START(port) (4 + (port) * 4)
+#define VI_CSI_PP_FRAME_START(port) (5 + (port) * 4)
+#define VI_CSI_MW_REQ_DONE(port) (6 + (port) * 4)
+#define VI_CSI_MW_ACK_DONE(port) (7 + (port) * 4)
+#define SYNCPT_FIFO_DEPTH 2
+
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT_CNTRL 0x004
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT_NO_STALL BIT(8)
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT_ERROR 0x008
+#define TEGRA_VI_CFG_CTXSW 0x020
+#define TEGRA_VI_CFG_INTSTATUS 0x024
+#define TEGRA_VI_CFG_PWM_CONTROL 0x038
+#define TEGRA_VI_CFG_PWM_HIGH_PULSE 0x03c
+#define TEGRA_VI_CFG_PWM_LOW_PULSE 0x040
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_A 0x044
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_B 0x048
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_C 0x04c
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_D 0x050
+#define TEGRA_VI_CFG_VGP1 0x064
+#define TEGRA_VI_CFG_VGP2 0x068
+#define TEGRA_VI_CFG_VGP3 0x06c
+#define TEGRA_VI_CFG_VGP4 0x070
+#define TEGRA_VI_CFG_VGP5 0x074
+#define TEGRA_VI_CFG_VGP6 0x078
+#define TEGRA_VI_CFG_INTERRUPT_MASK 0x08c
+#define TEGRA_VI_CFG_INTERRUPT_TYPE_SELECT 0x090
+#define TEGRA_VI_CFG_INTERRUPT_POLARITY_SELECT 0x094
+#define TEGRA_VI_CFG_INTERRUPT_STATUS 0x098
+#define TEGRA_VI_CFG_VGP_SYNCPT_CONFIG 0x0ac
+#define TEGRA_VI_CFG_VI_SW_RESET 0x0b4
+#define TEGRA_VI_CFG_CG_CTRL 0x0b8
+#define VI_CG_2ND_LEVEL_EN 0x1
+#define TEGRA_VI_CFG_VI_MCCIF_FIFOCTRL 0x0e4
+#define TEGRA_VI_CFG_TIMEOUT_WCOAL_VI 0x0e8
+#define TEGRA_VI_CFG_DVFS 0x0f0
+#define TEGRA_VI_CFG_RESERVE 0x0f4
+#define TEGRA_VI_CFG_RESERVE_1 0x0f8
+
+/* Tegra210 CSI registers */
+#define TEGRA_VI_CSI_SW_RESET 0x000
+#define TEGRA_VI_CSI_SINGLE_SHOT 0x004
+#define SINGLE_SHOT_CAPTURE 0x1
+#define TEGRA_VI_CSI_SINGLE_SHOT_STATE_UPDATE 0x008
+#define TEGRA_VI_CSI_IMAGE_DEF 0x00c
+#define BYPASS_PXL_TRANSFORM_OFFSET 24
+#define IMAGE_DEF_FORMAT_OFFSET 16
+#define IMAGE_DEF_DEST_MEM 0x1
+#define TEGRA_VI_CSI_RGB2Y_CTRL 0x010
+#define TEGRA_VI_CSI_MEM_TILING 0x014
+#define TEGRA_VI_CSI_IMAGE_SIZE 0x018
+#define IMAGE_SIZE_HEIGHT_OFFSET 16
+#define TEGRA_VI_CSI_IMAGE_SIZE_WC 0x01c
+#define TEGRA_VI_CSI_IMAGE_DT 0x020
+#define TEGRA_VI_CSI_SURFACE0_OFFSET_MSB 0x024
+#define TEGRA_VI_CSI_SURFACE0_OFFSET_LSB 0x028
+#define TEGRA_VI_CSI_SURFACE1_OFFSET_MSB 0x02c
+#define TEGRA_VI_CSI_SURFACE1_OFFSET_LSB 0x030
+#define TEGRA_VI_CSI_SURFACE2_OFFSET_MSB 0x034
+#define TEGRA_VI_CSI_SURFACE2_OFFSET_LSB 0x038
+#define TEGRA_VI_CSI_SURFACE0_BF_OFFSET_MSB 0x03c
+#define TEGRA_VI_CSI_SURFACE0_BF_OFFSET_LSB 0x040
+#define TEGRA_VI_CSI_SURFACE1_BF_OFFSET_MSB 0x044
+#define TEGRA_VI_CSI_SURFACE1_BF_OFFSET_LSB 0x048
+#define TEGRA_VI_CSI_SURFACE2_BF_OFFSET_MSB 0x04c
+#define TEGRA_VI_CSI_SURFACE2_BF_OFFSET_LSB 0x050
+#define TEGRA_VI_CSI_SURFACE0_STRIDE 0x054
+#define TEGRA_VI_CSI_SURFACE1_STRIDE 0x058
+#define TEGRA_VI_CSI_SURFACE2_STRIDE 0x05c
+#define TEGRA_VI_CSI_SURFACE_HEIGHT0 0x060
+#define TEGRA_VI_CSI_ISPINTF_CONFIG 0x064
+#define TEGRA_VI_CSI_ERROR_STATUS 0x084
+#define TEGRA_VI_CSI_ERROR_INT_MASK 0x088
+#define TEGRA_VI_CSI_WD_CTRL 0x08c
+#define TEGRA_VI_CSI_WD_PERIOD 0x090
+
+/* Tegra210 CSI Pixel Parser registers: Starts from 0x838, offset 0x0 */
+#define TEGRA_CSI_INPUT_STREAM_CONTROL 0x000
+#define CSI_SKIP_PACKET_THRESHOLD_OFFSET 16
+
+#define TEGRA_CSI_PIXEL_STREAM_CONTROL0 0x004
+#define CSI_PP_PACKET_HEADER_SENT BIT(4)
+#define CSI_PP_DATA_IDENTIFIER_ENABLE BIT(5)
+#define CSI_PP_WORD_COUNT_SELECT_HEADER BIT(6)
+#define CSI_PP_CRC_CHECK_ENABLE BIT(7)
+#define CSI_PP_WC_CHECK BIT(8)
+#define CSI_PP_OUTPUT_FORMAT_STORE (0x3 << 16)
+#define CSI_PPA_PAD_LINE_NOPAD (0x2 << 24)
+#define CSI_PP_HEADER_EC_DISABLE (0x1 << 27)
+#define CSI_PPA_PAD_FRAME_NOPAD (0x2 << 28)
+
+#define TEGRA_CSI_PIXEL_STREAM_CONTROL1 0x008
+#define CSI_PP_TOP_FIELD_FRAME_OFFSET 0
+#define CSI_PP_TOP_FIELD_FRAME_MASK_OFFSET 4
+
+#define TEGRA_CSI_PIXEL_STREAM_GAP 0x00c
+#define PP_FRAME_MIN_GAP_OFFSET 16
+
+#define TEGRA_CSI_PIXEL_STREAM_PP_COMMAND 0x010
+#define CSI_PP_ENABLE 0x1
+#define CSI_PP_DISABLE 0x2
+#define CSI_PP_RST 0x3
+#define CSI_PP_SINGLE_SHOT_ENABLE (0x1 << 2)
+#define CSI_PP_START_MARKER_FRAME_MAX_OFFSET 12
+
+#define TEGRA_CSI_PIXEL_STREAM_EXPECTED_FRAME 0x014
+#define TEGRA_CSI_PIXEL_PARSER_INTERRUPT_MASK 0x018
+#define TEGRA_CSI_PIXEL_PARSER_STATUS 0x01c
+#define TEGRA_CSI_CSI_SW_SENSOR_RESET 0x020
+
+/* Tegra210 CSI PHY registers */
+/* CSI_PHY_CIL_COMMAND_0 offset 0x0d0 from TEGRA_CSI_PIXEL_PARSER_0_BASE */
+#define TEGRA_CSI_PHY_CIL_COMMAND 0x0d0
+#define CSI_A_PHY_CIL_NOP 0x0
+#define CSI_A_PHY_CIL_ENABLE 0x1
+#define CSI_A_PHY_CIL_DISABLE 0x2
+#define CSI_A_PHY_CIL_ENABLE_MASK 0x3
+#define CSI_B_PHY_CIL_NOP (0x0 << 8)
+#define CSI_B_PHY_CIL_ENABLE (0x1 << 8)
+#define CSI_B_PHY_CIL_DISABLE (0x2 << 8)
+#define CSI_B_PHY_CIL_ENABLE_MASK (0x3 << 8)
+
+#define TEGRA_CSI_CIL_PAD_CONFIG0 0x000
+#define BRICK_CLOCK_A_4X (0x1 << 16)
+#define BRICK_CLOCK_B_4X (0x2 << 16)
+#define TEGRA_CSI_CIL_PAD_CONFIG1 0x004
+#define TEGRA_CSI_CIL_PHY_CONTROL 0x008
+#define TEGRA_CSI_CIL_INTERRUPT_MASK 0x00c
+#define TEGRA_CSI_CIL_STATUS 0x010
+#define TEGRA_CSI_CILX_STATUS 0x014
+#define TEGRA_CSI_CIL_ESCAPE_MODE_COMMAND 0x018
+#define TEGRA_CSI_CIL_ESCAPE_MODE_DATA 0x01c
+#define TEGRA_CSI_CIL_SW_SENSOR_RESET 0x020
+
+#define TEGRA_CSI_PATTERN_GENERATOR_CTRL 0x000
+#define PG_MODE_OFFSET 2
+#define PG_ENABLE 0x1
+#define PG_DISABLE 0x0
+
+#define PG_VBLANK_OFFSET 16
+#define TEGRA_CSI_PG_BLANK 0x004
+#define TEGRA_CSI_PG_PHASE 0x008
+#define TEGRA_CSI_PG_RED_FREQ 0x00c
+#define PG_RED_VERT_INIT_FREQ_OFFSET 16
+#define PG_RED_HOR_INIT_FREQ_OFFSET 0
+
+#define TEGRA_CSI_PG_RED_FREQ_RATE 0x010
+#define TEGRA_CSI_PG_GREEN_FREQ 0x014
+#define PG_GREEN_VERT_INIT_FREQ_OFFSET 16
+#define PG_GREEN_HOR_INIT_FREQ_OFFSET 0
+
+#define TEGRA_CSI_PG_GREEN_FREQ_RATE 0x018
+#define TEGRA_CSI_PG_BLUE_FREQ 0x01c
+#define PG_BLUE_VERT_INIT_FREQ_OFFSET 16
+#define PG_BLUE_HOR_INIT_FREQ_OFFSET 0
+
+#define TEGRA_CSI_PG_BLUE_FREQ_RATE 0x020
+#define TEGRA_CSI_PG_AOHDR 0x024
+
+#define TEGRA_CSI_DPCM_CTRL_A 0xa2c
+#define TEGRA_CSI_DPCM_CTRL_B 0xa30
+
+/* Other CSI registers: Starts from 0xa44, offset 0x20c */
+#define TEGRA_CSI_STALL_COUNTER 0x20c
+#define TEGRA_CSI_CSI_READONLY_STATUS 0x210
+#define TEGRA_CSI_CSI_SW_STATUS_RESET 0x214
+#define TEGRA_CSI_CLKEN_OVERRIDE 0x218
+#define TEGRA_CSI_DEBUG_CONTROL 0x21c
+#define TEGRA_CSI_DEBUG_COUNTER_0 0x220
+#define TEGRA_CSI_DEBUG_COUNTER_1 0x224
+#define TEGRA_CSI_DEBUG_COUNTER_2 0x228
+
+/* Tegra210 CSI Pixel Parser registers */
+#define TEGRA_CSI_PIXEL_PARSER_0_BASE 0x0838
+#define TEGRA_CSI_PIXEL_PARSER_1_BASE 0x086c
+#define TEGRA_CSI_PIXEL_PARSER_2_BASE 0x1038
+#define TEGRA_CSI_PIXEL_PARSER_3_BASE 0x106c
+#define TEGRA_CSI_PIXEL_PARSER_4_BASE 0x1838
+#define TEGRA_CSI_PIXEL_PARSER_5_BASE 0x186c
+
+#endif

Regards,

Hans

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