[Bug 101619] [SKL] DPCD backlight causes black screen on ThinkPad X1 Carbon 4th Gen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101619

--- Comment #17 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to David Weinehall from comment #15)
> Unless I'm misinterpreting the eDP v1.4 spec, the AUX CH backlight support
> is for eDP v1.4 and later only.

You're misinterpreting, but the spec makes it easy to do so. Looking at eDP
v1.3 specs is easier for checking what was available then than trying to
decipher that from eDP v1.4 spec.

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