media: tegra-video: Add support for EDID ioctl ops

This patch adds support for EDID get and set v4l2 ioctl ops to use
with 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>

diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index d01e88de6b31fb38d567b4b13a592bb5ea3e73a7..bc38136eae3574301c4a5162acc5d5c42f0acffd 100644 (file)
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -721,6 +721,32 @@ static int tegra_channel_s_selection(struct file *file, void *fh,
        return ret;
 }
 
+static int tegra_channel_g_edid(struct file *file, void *fh,
+                               struct v4l2_edid *edid)
+{
+       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, get_edid))
+               return -ENOTTY;
+
+       return v4l2_subdev_call(subdev, pad, get_edid, edid);
+}
+
+static int tegra_channel_s_edid(struct file *file, void *fh,
+                               struct v4l2_edid *edid)
+{
+       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, set_edid))
+               return -ENOTTY;
+
+       return v4l2_subdev_call(subdev, pad, set_edid, edid);
+}
+
 static int tegra_channel_g_dv_timings(struct file *file, void *fh,
                                      struct v4l2_dv_timings *timings)
 {
@@ -873,6 +899,8 @@ 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_edid                  = tegra_channel_g_edid,
+       .vidioc_s_edid                  = tegra_channel_s_edid,
        .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,