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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: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Sowjanya Komatineni 2020-12-11 18:02:34 +01:00 committed by Mauro Carvalho Chehab
parent fbef4d6bb9
commit 4281d115a4
1 changed files with 99 additions and 0 deletions
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99
drivers/staging/media/tegra-video/vi.c
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@ -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,
};
/*