This is a note to let you know that I've just added the patch titled
media: rcar-vin: Select correct interrupt mode for V4L2_FIELD_ALTERNATE
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-rcar-vin-select-correct-interrupt-mode-for-v4l.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fd68f9650bcabe0086c5dd9287b256f21e3e33d1
Author: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
Date: Sat Feb 11 21:55:34 2023 +0100
media: rcar-vin: Select correct interrupt mode for V4L2_FIELD_ALTERNATE
[ Upstream commit e10707d5865c90d3dfe4ef589ce02ff4287fef85 ]
When adding proper support for V4L2_FIELD_ALTERNATE it was missed that
this field format should trigger an interrupt for each field, not just
for the whole frame. Fix this by marking it as progressive in the
capture setup, which will then select the correct interrupt mode.
Tested on both Gen2 and Gen3 with the result of a doubling of the frame
rate for V4L2_FIELD_ALTERNATE. From a PAL video source the frame rate is
now 50, which is expected for alternate field capture.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 70a8cc433a03f..cc28e2cb23f11 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -633,6 +633,7 @@ static int rvin_setup(struct rvin_dev *vin)
vnmc = VNMC_IM_FULL | VNMC_FOC;
break;
case V4L2_FIELD_NONE:
+ case V4L2_FIELD_ALTERNATE:
vnmc = VNMC_IM_ODD_EVEN;
progressive = true;
break;
