[Bug 112014] i915: intel_dp_aux_backlight max_brightness set to incorrect value on Thinkpad P1 Gen2 AMOLED

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112014

--- Comment #5 from scachemaille <scachemaille at gmail.com> ---
(In reply to Jani Nikula from comment #4)
> Does this help?
> 
> http://patchwork.freedesktop.org/patch/msgid/20190618062628.133783-1-
> furquan at google.com

Helllo,
I just tested the above patch on my Thinkpad X1 extreme Gen 2. on manjaro with
the kernel 5.3.10 (the specs of my computer in my previous post)

And It seems to works fine on my system

Now the max brightness reported in
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/max_brightness
is 2047 and the brightness control works as inteded on my plasma desktop and my
4k OLED display.

if you need more informations let me now.

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