Hi Maxime,
On Wed, 2021-11-17 at 15:50 +0100, Maxime Ripard wrote:
Hi,
The VC4 driver has had limited support to disable the HDMI controllers and pixelvalves at boot if the firmware has enabled them.
However, this proved to be limited, and a bit unreliable so a new firmware command has been introduced some time ago to make it free all its resources and disable any display output it might have enabled.
This series takes advantage of that command to call it once the transition from simplefb to the KMS driver has been done.
I think it would make sense to integrate this funtionality into 'reset/reset-raspberrypi.c' and pass it to VC4 as a reset controller. It fits the same startup situation as the one we have with the USB controller. Also, it would contain the firmware weirdness in a single spot.
Otherwise, please use 'devm_rpi_firmware_get()'.
Regards, Nicolas