This patch adds below v4l2 DV timing ioctls to support HDMI-to-CSI
bridges.
Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx>
---
drivers/staging/media/tegra-video/vi.c | 99 ++++++++++++++++++++++++++++++++++
1 file changed, 99 insertions(+)
diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 525c087..d01e88d 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -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,
};
/*
--
2.7.4
