[PATCH 5.16 0346/1017] media: ov5640: Fix set format, v4l2_mbus_pixelcode not updated

Greg Kroah-Hartman
2022-04-05T12:19:54Z

From: Mirela Rabulea <mirela.rabulea@nxp.com>

[ Upstream commit e738f5dd67eb8098d75345908a5e73782d0569a5 ]

In ov5640_set_fmt, pending_fmt_change will always be false, because the
sensor format is saved before comparing it with the previous format:
fmt = &sensor->fmt;...
*fmt = *mbus_fmt;...
if (mbus_fmt->code != sensor->fmt.code)
sensor->pending_fmt_change = true;
This causes the sensor to capture with the previous pixelcode.

Also, changes might happen even for V4L2_SUBDEV_FORMAT_TRY, so fix that.

Basically, revert back to the state before
commit 071154499193 ("media: ov5640: Fix set format regression")
as it was more clear, and then update format even when pixelcode does
not change, as resolution might change.

Fixes: 071154499193 ("media: ov5640: Fix set format regression")
Fixes: 6949d864776e ("media: ov5640: do not change mode if format or frame interval is unchanged")
Fixes: fb98e29ff1ea5 ("media: ov5640: fix mode change regression")

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Acked-by: Hugues Fruchet <hugues.fruchet@st.com>
Tested-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/i2c/ov5640.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index ddbd71394db3..db5a19babe67 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -2293,7 +2293,6 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
struct ov5640_dev *sensor = to_ov5640_dev(sd);
const struct ov5640_mode_info *new_mode;
struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
- struct v4l2_mbus_framefmt *fmt;
int ret;

if (format->pad != 0)
@@ -2311,12 +2310,10 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
if (ret)
goto out;

- if (format->which == V4L2_SUBDEV_FORMAT_TRY)
- fmt = v4l2_subdev_get_try_format(sd, sd_state, 0);
- else
- fmt = &sensor->fmt;
-
- *fmt = *mbus_fmt;
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ *v4l2_subdev_get_try_format(sd, sd_state, 0) = *mbus_fmt;
+ goto out;
+ }

if (new_mode != sensor->current_mode) {
sensor->current_mode = new_mode;
@@ -2325,6 +2322,9 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
if (mbus_fmt->code != sensor->fmt.code)
sensor->pending_fmt_change = true;

+ /* update format even if code is unchanged, resolution might change */
+ sensor->fmt = *mbus_fmt;
+
__v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
ov5640_calc_pixel_rate(sensor));
out:
--
2.34.1