MB1854B camera suddenly failed and is unusable.

[Cedricl]

The MB1854B camera on the STM32MP257FDK fails to open; clicking the camera icon on the desktop results in a white screen. Is this related to hot-plugging the camera? How can this be resolved?

 

dmesg -w log:
stm32-csi 48020000.csi: Timeout waiting for VC0 stop
stm32-csi 48020000.csi: Failed to stop stream:0

[Erwan SZYMANSKI]

Hello ​@Cedricl ,
When you talk about “hot-plugging” the camera what do you mean ? Is the camera not working anymore since you hot-plugged it when the board was running ? Or do you mean that the camera cannot work properly when you hot-plug it at runtime, but can work if it is already plugged when starting the board ?

Thank you to precise.

Kind regards,
Erwan.

[Cedricl]

Hello ​@Erwan SZYMANSKI ,

"Hot-swapping" here refers to unplugging and then replugging the camera while the board is powered on; after rebooting the device, the camera fails to function correctly. However, if I connect a known-working camera while the board is powered off, it operates normally after the board boots up—though if I subsequently accidentally hot-swap that camera, it also stops working properly.

I tried unplugging it overnight, but it still won't work properly.

 

Kind regards,

Cedricl.

 

[Erwan SZYMANSKI]

Hello ​@Cedricl,

The CSI connector present on DK board has not been imagined to be hot plugged, as the pins are really close to each other (you can see it). I guess you damaged your camera by touching some wrong connection when you removed / plugged it at runtime.

Sorry for that, but I think you need to replace the camera and do not continue to hot plug new ones. 

Kind regards,
Erwan.

[erajbrooks]

The VC0 stop timeout suggests the CSI stream may not be shutting down properly. If this happened after hot-plugging, I’d try a full power cycle and reconnect the camera while powered off. Checking dmesg after reconnecting may also help identify whether it’s a driver or hardware issue.

[Cedricl]

Hello ​@erajbrooks ,

 

When the camera is completely powered off and restarted, it doesn’t work properly, and reconnecting it while the device is off doesn’t help either.

However, the second camera would show a white screen during the first few hot swaps, and doing this sometimes brought it back to normal before it completely 'broke.' But after one of these times, it completely 'broke'.

 

Kind regards,

Cedricl.