media: tegra-video: Implement V4L2 device notify callback

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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>

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Sowjanya Komatineni 2020-12-11 18:02:38 +01:00 • committed by Mauro Carvalho Chehab

parent 2be21e6834

commit 4fe27eb68c

2 changed files with 21 additions and 0 deletions

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3

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

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18

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

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