[Bug 96571] [CHV] Backlight init fails on Surface 3 if module load order is wrong

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96571

--- Comment #64 from Hans de Goede <jwrdegoede at fedoraproject.org> ---
(In reply to youling257 from comment #61)
>  [drm:pwm_setup_backlight [i915]] *ERROR* Failed to own the pwm chip
> I see this problem happen again with Linux 5.3rc1 kernel on my BayTrail
> z3735f device! can't adjust brightness.
> 
> Linux 5.3, what reason?

I've just installed 5.3 on a CHT device with LPSS PWM driving the backlight and
I'm seeing the same thing. This seems to be a 5.3 regression which is a
separate issue from the original issue of this bug.

I'll investigate the 5.3 regression further and write a patch fixing it.

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