[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 #53 from Steve Dodd <steved424 at gmail.com> ---
Just to add to the confusion here, I am still seeing what looks like the
ordering problem, even though LPSS PWM driver is built-in (this is on Asus
T100HA):

steved at asus:~$ journalctl -b -1 | grep -i pwm
Apr 20 18:31:16 asus kernel:  (null): Device [PWM1] is in always present list
Apr 20 18:31:43 asus kernel: [drm:pwm_setup_backlight [i915]] *ERROR* Failed to
own the pwm chip

steved at asus:~$ uname -a
Linux asus 4.16.3.0 #14 SMP Thu Apr 19 00:11:41 MST 2018 x86_64 x86_64 x86_64
GNU/Linux

steved at asus:~$ grep LPSS /boot/config-4.16.3.0 | grep -v MFD
CONFIG_X86_INTEL_LPSS=y
CONFIG_SERIAL_8250_LPSS=y
CONFIG_PWM_LPSS=y
CONFIG_PWM_LPSS_PCI=y
CONFIG_PWM_LPSS_PLATFORM=y

Have I misunderstood something?

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