drivers: video: dcmi: DMA error message on capture sample

[josuah]

Describe the bug

Trying the capture again on main, an error message appears.

This was working earlier so will be possible to walk up the history tree.

Regression

• This is a regression.

Steps to reproduce

1. west build -b arduino_nicla_vision/stm32h747xx/m7
2. west flash
3. Connect to the console over USB where the logs are printed (i.e. /dev/ttyACM0, any baudrate)

Relevant log output

[00:00:00.000,000] <inf> camera_ext_clock: Camera external clock rate: (10000000) Hz
[00:00:00.000,000] <err> video_stm32_dcmi: DCMI DMA Init failed
[00:00:00.000,000] <err> video_stm32_dcmi: DMA initialization failed.
*** Booting Zephyr OS build v4.1.0-6399-g1931a35c74fa ***
[00:00:00.413,000] <err> main: dcmi@48020000: video device is not ready
uart:~$ device list
...
- dma@40020000 (READY)
  DT node labels: dma1
...
- gc2145@3c (READY)
  DT node labels: gc2145
- dcmi@48020000 (DISABLED)
  DT node labels: dcmi

Impact

Functional Limitation – Some features not working as expected, but system usable.

Environment

No response

Additional Context

• OS: Debian 13.0
• Toolchain: zephyr-sdk-0.17.0
• Commit: 92d4669

[josuah]

9c62fb8 ❌ video: stm32: dcmi: correct typo dmci -> dcmi
64149e4 ❌ video: stm32_dcmi: addition of STM32L4 DMA support
b03ec6d ⭕ video: stm32: dcmi: fix video interface properties read
e3aa349 ⭕ doc: arch: Update file summary for kernel interfaces

It seems like 64149e4 will need some light tuning.

[josuah]

Adding the ST/Video crew for visibility given the v4.2 release date approaching.