[PATCH v2] nvidia-wmi-ec-backlight: Add workarounds for confused firmware

[Daniel Dadap]

On 3/17/22 12:35, Alex Deucher wrote:
> Sorry for jumping in here, but I can't seem to find the original
> thread with this comment.  amdgpu_atombios_encoder_init_backlight() is
> not applicable to these systems.  That is the old pre-DC code path.
> You want amdgpu_dm_register_backlight_device() for modern hardware.


Oops, thanks for the correction. Alex Dinu: see the above for the 
correct code path to disable to test whether not registering the amdgpu 
backlight device helps. I have some other things to attend to, so it 
will be a little while before I can get you the instrumented driver I 
mentioned in one of my replies to Hans, but hopefully we'll be able to 
figure something out to actually switch the backlight control to EC 
without having to do a suspend/resume cycle.