[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 #17 from Shobhit <shobhit.kumar at intel.com> ---
Sorry, I think I missed them. BTW I found two logs in the mail - panic-mtd.txt
and lpss-pwm-patches-dmesg.txt

The first set of log you gave -
[    2.658013] pwm-byt-plat 80860F09:00: PWM device probed: pwm_num=0,
mmio_base=ffffc90001a46000 clk_khz=25000
[    2.658223] pwm-byt-plat 80860F09:01: PWM device probed: pwm_num=1,
mmio_base=ffffc90001a48000 clk_khz=25000

are seen in panic-mtd.txt and which is based on 3.10 kernel version as per the
logs.

Following one is seen in the other file which shows version as 4.5

[   15.203281] [drm:pwm_setup_backlight [i915]] *ERROR* Failed to own the pwm
chip: pwm_lpss

So I am totally confused in the relationship of the logs. Look like they are
from two different kernel boot instance of two different kernel version.

Please provide me logs with latest run that you are planning to test now. put
some prints in platform driver probe for LPSS pwm so that we can confirm that
it found ACPI ID match or not. Also provide acpi table dump using acpidump.

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