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authorMarian Cichy <m.cichy@pengutronix.de>2021-03-15 11:17:25 +0100
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-03-16 02:03:37 +0200
commit4671911df040aeb3fdda07ae7cd2ce41eb6421cd (patch)
treec0add74c143c009512086b1fc1d0674aeb50658a /test/v4l2_videodevice
parent287e4f82bd0e94b936b2cbc420aa1fa5645d1503 (diff)
pipeline: simple: Use breadth-first search to setup media pipeline
When the SimplePipeline is setting up its data and media pipeline in the SimpleCameraData constructor, it merely tries to find the first valid pad and link to the next entity, starting from the camera sensor. Following this path may not always lead to a valid capture device and therefore the setup will fail on some machines. This is for example an issue when using the SimplePipeline on an i.MX-6Q with its i.MX IPU. This commit implements a different approach to setup the media-pipeline by finding the shortest path to a valid capture device, using the breadth-first search algorithm. On i.MX6Q, the shortest path has a good chance to be the path from the sensor to the CSI capture device, as other paths may involve image converters, encoders or other IPU blocks and will have therefore more nodes. Signed-off-by: Marian Cichy <m.cichy@pengutronix.de> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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