Hello, This series adapts the R-Car CSI-2 receiver recovery logic to match updates in the datasheet. The later datasheets recommend that the whole video pipeline shall be stopped if an transmission error is detected instead of just restarting the CSI-2 receiver. To do this we leverage the recent changes to support suspend/resume of time the whole pipeline and inform the C-Car VIN driver of the detected error so it can stop the whole pipeline and inform user-space of the detected fault. Patch 1/4 and 2/4 fixes faults in the VIN driver that where detected when working on this. Patch 3/4 prepares the VIN driver to deal with the EOS event from R-Car CSI-2 driver And patch 4/4 changes the error logic of the CSI-2 receiver to match the datasheet. This is tested on M3-N and a fault is injected by quickly removing and re-inserting the HDMI cable while streaming. This method does not always hit and is time consuming. To consistently prove correctness of handling a fake fault was introduced by a HACK and a debugfs entry. Niklas Söderlund (4): rcar-vin: Do not try to stop stream if not running rcar-vin: Route events to correct video device rcar-vin: Stop stream when subdevice signal EOS rcar-csi2: Do not try to recover after transfer error drivers/media/platform/rcar-vin/rcar-csi2.c | 14 +++-- drivers/media/platform/rcar-vin/rcar-dma.c | 5 ++ drivers/media/platform/rcar-vin/rcar-v4l2.c | 58 ++++++++++++++++++--- 3 files changed, 63 insertions(+), 14 deletions(-) -- 2.29.2
