Camera is not working anymore on frdm_mcxn_947

[ngphibang]

I tried zephyr v4.1.0 and hal nxp at fad8c6d49c2bc22c2056b291f82803e8da701806 (just before sdk next gen) where there is no recent change in the video system on the Zephyr side. The camera ov7670 and smartdma does not work. The smartdma cannot dequeue the buffer (no bug but no frame to dequeue), it stucks at https://github.com/zephyrproject-rtos/zephyr/blob/main/drivers/video/video_mcux_smartdma.c#L176

To reproduce:

west build -p -b frdm_mcxn947/mcxn947/cpu0 samples/drivers/video/capture -DCONFIG_DEBUG_OPTIMIZATIONS=y
west flash

The problem is found on Zephyr side but I think there is something changed on the SDK side (driver fsl_smartdma.c ?)

@zejiang0jason

[KATE-WANG-NXP]

Hi, I reproduced the issue and used the code provided by vendor to AE to initialize the ov7670 module and the issue is gone. Here is the PR: zephyrproject-rtos/zephyr#91760. Please help verify on your side too, thanks! I'm not sure how the original code passed the test, my guess is that the ov7670 module has many versions and the original code does not work on the module I have and maybe yours too(similar things happened before).

[josuah]

I could test and confirm it works. Thank you for the help!

[josuah]

zephyrproject-rtos/zephyr#91760 is merged, maybe this can be closed