[PATCH 4.19 073/191] media: imx274: fix frame interval handling

From: Greg Kroah-Hartman
Date: Tue Nov 03 2020 - 16:24:16 EST


From: Hans Verkuil <hverkuil@xxxxxxxxx>

[ Upstream commit 49b20d981d723fae5a93843c617af2b2c23611ec ]

1) the numerator and/or denominator might be 0, in that case
fall back to the default frame interval. This is per the spec
and this caused a v4l2-compliance failure.

2) the updated frame interval wasn't returned in the s_frame_interval
subdev op.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Reviewed-by: Luca Ceresoli <luca@xxxxxxxxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/media/i2c/imx274.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c
index 8cc3bdb7f608c..0fe8b869245b8 100644
--- a/drivers/media/i2c/imx274.c
+++ b/drivers/media/i2c/imx274.c
@@ -1239,6 +1239,8 @@ static int imx274_s_frame_interval(struct v4l2_subdev *sd,
ret = imx274_set_frame_interval(imx274, fi->interval);

if (!ret) {
+ fi->interval = imx274->frame_interval;
+
/*
* exposure time range is decided by frame interval
* need to update it after frame interval changes
@@ -1760,9 +1762,9 @@ static int imx274_set_frame_interval(struct stimx274 *priv,
__func__, frame_interval.numerator,
frame_interval.denominator);

- if (frame_interval.numerator == 0) {
- err = -EINVAL;
- goto fail;
+ if (frame_interval.numerator == 0 || frame_interval.denominator == 0) {
+ frame_interval.denominator = IMX274_DEF_FRAME_RATE;
+ frame_interval.numerator = 1;
}

req_frame_rate = (u32)(frame_interval.denominator
--
2.27.0