Commit 4281d115 authored by Sowjanya Komatineni's avatar Sowjanya Komatineni Committed by Mauro Carvalho Chehab
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media: tegra-video: Add DV timing support 



This patch adds below v4l2 DV timing ioctls to support HDMI-to-CSI
bridges.

Signed-off-by: default avatarSowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent fbef4d6b

drivers/staging/media/tegra-video/vi.c

+99 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/pm_runtime.h>

#include <linux/slab.h>



#include <media/v4l2-dv-timings.h>

#include <media/v4l2-event.h>

#include <media/v4l2-fh.h>

#include <media/v4l2-fwnode.h>
@@ -720,6 +721,97 @@ static int tegra_channel_s_selection(struct file *file, void *fh, 
	return ret;

}



static int tegra_channel_g_dv_timings(struct file *file, void *fh,

				      struct v4l2_dv_timings *timings)

{

	struct tegra_vi_channel *chan = video_drvdata(file);

	struct v4l2_subdev *subdev;



	subdev = tegra_channel_get_remote_source_subdev(chan);

	if (!v4l2_subdev_has_op(subdev, video, g_dv_timings))

		return -ENOTTY;



	return v4l2_device_call_until_err(chan->video.v4l2_dev, 0,

					  video, g_dv_timings, timings);

}



static int tegra_channel_s_dv_timings(struct file *file, void *fh,

				      struct v4l2_dv_timings *timings)

{

	struct tegra_vi_channel *chan = video_drvdata(file);

	struct v4l2_subdev *subdev;

	struct v4l2_bt_timings *bt = &timings->bt;

	struct v4l2_dv_timings curr_timings;

	int ret;



	subdev = tegra_channel_get_remote_source_subdev(chan);

	if (!v4l2_subdev_has_op(subdev, video, s_dv_timings))

		return -ENOTTY;



	ret = tegra_channel_g_dv_timings(file, fh, &curr_timings);

	if (ret)

		return ret;



	if (v4l2_match_dv_timings(timings, &curr_timings, 0, false))

		return 0;



	if (vb2_is_busy(&chan->queue))

		return -EBUSY;



	ret = v4l2_device_call_until_err(chan->video.v4l2_dev, 0,

					 video, s_dv_timings, timings);

	if (ret)

		return ret;



	chan->format.width = bt->width;

	chan->format.height = bt->height;

	chan->format.bytesperline = bt->width * chan->fmtinfo->bpp;

	chan->format.sizeimage = chan->format.bytesperline * bt->height;

	tegra_channel_fmt_align(chan, &chan->format, chan->fmtinfo->bpp);



	return 0;

}



static int tegra_channel_query_dv_timings(struct file *file, void *fh,

					  struct v4l2_dv_timings *timings)

{

	struct tegra_vi_channel *chan = video_drvdata(file);

	struct v4l2_subdev *subdev;



	subdev = tegra_channel_get_remote_source_subdev(chan);

	if (!v4l2_subdev_has_op(subdev, video, query_dv_timings))

		return -ENOTTY;



	return v4l2_device_call_until_err(chan->video.v4l2_dev, 0,

					  video, query_dv_timings, timings);

}



static int tegra_channel_enum_dv_timings(struct file *file, void *fh,

					 struct v4l2_enum_dv_timings *timings)

{

	struct tegra_vi_channel *chan = video_drvdata(file);

	struct v4l2_subdev *subdev;



	subdev = tegra_channel_get_remote_source_subdev(chan);

	if (!v4l2_subdev_has_op(subdev, pad, enum_dv_timings))

		return -ENOTTY;



	return v4l2_subdev_call(subdev, pad, enum_dv_timings, timings);

}



static int tegra_channel_dv_timings_cap(struct file *file, void *fh,

					struct v4l2_dv_timings_cap *cap)

{

	struct tegra_vi_channel *chan = video_drvdata(file);

	struct v4l2_subdev *subdev;



	subdev = tegra_channel_get_remote_source_subdev(chan);

	if (!v4l2_subdev_has_op(subdev, pad, dv_timings_cap))

		return -ENOTTY;



	return v4l2_subdev_call(subdev, pad, dv_timings_cap, cap);

}



static int tegra_channel_enum_input(struct file *file, void *fh,

				    struct v4l2_input *inp)

{
@@ -732,6 +824,8 @@ static int tegra_channel_enum_input(struct file *file, void *fh, 
	inp->type = V4L2_INPUT_TYPE_CAMERA;

	subdev = tegra_channel_get_remote_source_subdev(chan);

	strscpy(inp->name, subdev->name, sizeof(inp->name));

	if (v4l2_subdev_has_op(subdev, pad, dv_timings_cap))

		inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;



	return 0;

}
@@ -779,6 +873,11 @@ static const struct v4l2_ioctl_ops tegra_channel_ioctl_ops = { 
	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,

	.vidioc_g_selection		= tegra_channel_g_selection,

	.vidioc_s_selection		= tegra_channel_s_selection,

	.vidioc_g_dv_timings		= tegra_channel_g_dv_timings,

	.vidioc_s_dv_timings		= tegra_channel_s_dv_timings,

	.vidioc_query_dv_timings	= tegra_channel_query_dv_timings,

	.vidioc_enum_dv_timings		= tegra_channel_enum_dv_timings,

	.vidioc_dv_timings_cap		= tegra_channel_dv_timings_cap,

};



/*