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| author |  Sowjanya Komatineni <skomatineni@nvidia.com>
| 2020-12-11 18:02:38 +0100 |
|---|---|---|
| committer |  Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
| 2021-01-04 13:01:58 +0100 |
| commit | 4fe27eb68caca9db1324ee958140cf4a83ecdc9a (patch) | |
| tree | 75e5034e0985cc3e588fd03466232e2fc802e85d | |
| parent | media: tegra-video: Add support for V4L2_EVENT_SOURCE_CHANGE (diff) | |
| download | linux-4fe27eb68caca9db1324ee958140cf4a83ecdc9a.tar.gz linux-4fe27eb68caca9db1324ee958140cf4a83ecdc9a.tar.bz2 linux-4fe27eb68caca9db1324ee958140cf4a83ecdc9a.zip | |
media: tegra-video: Implement V4L2 device notify callback
Implement V4L2 device notify callback to handle
V4L2_EVENT_SOURCE_CHANGE event from subdevices.
HDMI-to-CSI bridge drivers trigger V4L2_EVENT_SOURCE_CHANGE when
source DV timing changes are detected or when HDMI hotplug happens.
Runtime source parameter changes during active streaming is not
allowed and Tegra video driver calls vb2_queue_error to signal a
fatal error if a notification of this event happens during an active
streaming.
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>
| -rw-r--r-- | drivers/staging/media/tegra-video/vi.c | 3 | ||||
| -rw-r--r-- | drivers/staging/media/tegra-video/video.c | 18 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c index 0a85e527ec40..d42a218d3ee9 100644 --- a/drivers/staging/media/tegra-video/vi.c +++ b/drivers/staging/media/tegra-video/vi.c @@ -1636,6 +1636,9 @@ static int tegra_vi_graph_notify_complete(struct v4l2_async_notifier *notifier) v4l2_set_subdev_hostdata(subdev, chan); + subdev = tegra_channel_get_remote_source_subdev(chan); + v4l2_set_subdev_hostdata(subdev, chan); + return 0; unregister_video: diff --git a/drivers/staging/media/tegra-video/video.c b/drivers/staging/media/tegra-video/video.c index e50bd70575f3..d966b319553f 100644 --- a/drivers/staging/media/tegra-video/video.c +++ b/drivers/staging/media/tegra-video/video.c @@ -7,6 +7,8 @@ #include <linux/module.h> #include <linux/platform_device.h> +#include <media/v4l2-event.h> + #include "video.h" static void tegra_v4l2_dev_release(struct v4l2_device *v4l2_dev) @@ -24,6 +26,21 @@ static void tegra_v4l2_dev_release(struct v4l2_device *v4l2_dev) kfree(vid); } +static void tegra_v4l2_dev_notify(struct v4l2_subdev *sd, + unsigned int notification, void *arg) +{ + struct tegra_vi_channel *chan; + const struct v4l2_event *ev = arg; + + if (notification != V4L2_DEVICE_NOTIFY_EVENT) + return; + + chan = v4l2_get_subdev_hostdata(sd); + v4l2_event_queue(&chan->video, arg); + if (ev->type == V4L2_EVENT_SOURCE_CHANGE && vb2_is_streaming(&chan->queue)) + vb2_queue_error(&chan->queue); +} + static int host1x_video_probe(struct host1x_device *dev) { struct tegra_video_device *vid; @@ -49,6 +66,7 @@ static int host1x_video_probe(struct host1x_device *dev) vid->v4l2_dev.mdev = &vid->media_dev; vid->v4l2_dev.release = tegra_v4l2_dev_release; + vid->v4l2_dev.notify = tegra_v4l2_dev_notify; ret = v4l2_device_register(&dev->dev, &vid->v4l2_dev); if (ret < 0) { dev_err(&dev->dev, |