[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 #67 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to youling257 from comment #61)
> CONFIG_I2C_DESIGNWARE_CORE=y
> CONFIG_I2C_DESIGNWARE_PLATFORM=y
> CONFIG_I2C_DESIGNWARE_SLAVE=y
> CONFIG_I2C_DESIGNWARE_PCI=y
> CONFIG_I2C_DESIGNWARE_BAYTRAIL=y
> CONFIG_PWM=y
> CONFIG_PWM_SYSFS=y
> CONFIG_PWM_CRC=y
> CONFIG_PWM_LPSS=y
> CONFIG_PWM_LPSS_PCI=y
> CONFIG_PWM_LPSS_PLATFORM=y
> 
>  [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?

So it looks like this comment hijacked the bug about something completely
different, and now we have a patch en route upstream claiming it fixes this
bug, while in truth the original LPSS issues is not fixed. :(

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