[PATCH] media: i2c: imx283: Enter full standby when stopping streaming

[Jai Luthra]

Use IMX283_STANDBY (bit 0) instead of IMX283_STBLOGIC (bit 1) when
stopping streaming. STBLOGIC only puts the sensor logic into standby but
leaves the MIPI interface (along with other components) in an
indeterminate state.

This (presumably) causes the CSI receiver (e.g. Raspberry Pi's CFE) to
miss the LP-11 to HS transition when streaming restarts, resulting in a
hang of 10+ seconds. The issue is most visible when immediately
restarting a full-resolution stream after stopping a 3x3 binned one, so
that runtime suspend hasn't yet been triggered.

Writing IMX283_STANDBY puts the entire sensor into standby. The
imx283_standby_cancel() sequence already handles the full wakeup from
this suspended state.

Cc: stable@xxxxxxxxxxxxxxx
Link: https://github.com/raspberrypi/linux/issues/7153
Link: https://github.com/will127534/OneInchEye/issues/12
Fixes: ccb4eb4496fa ("media: i2c: Add imx283 camera sensor driver")
Signed-off-by: Jai Luthra <jai.luthra@xxxxxxxxxxxxxxxx>
---
 drivers/media/i2c/imx283.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/imx283.c b/drivers/media/i2c/imx283.c
index 8ab63ad8f385f6e2a2d7432feff0af09a5356dc4..9b3094a57873c6e8ff8c41d058ea3b0012642cac 100644
--- a/drivers/media/i2c/imx283.c
+++ b/drivers/media/i2c/imx283.c
@@ -1158,7 +1158,7 @@ static int imx283_disable_streams(struct v4l2_subdev *sd,
 	if (pad != IMAGE_PAD)
 		return -EINVAL;
 
-	ret = cci_write(imx283->cci, IMX283_REG_STANDBY, IMX283_STBLOGIC, NULL);
+	ret = cci_write(imx283->cci, IMX283_REG_STANDBY, IMX283_STANDBY, NULL);
 	if (ret)
 		dev_err(imx283->dev, "Failed to stop stream\n");
 

---
base-commit: 37a93dd5c49b5fda807fd204edf2547c3493319c
change-id: 20260212-imx283-hang-fix-8b3f45087ef6

Best regards,
-- 
Jai Luthra <jai.luthra@xxxxxxxxxxxxxxxx>