[Bug 89704] [byt dsi] No image on WinBook TW700 tablet's DSI display after DRM initializes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89704

zeng.shixin at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |REOPENED

--- Comment #29 from zeng.shixin at gmail.com ---
i915 is still complaining about PWM.

I added some prints, and found that ACPI seemed to be reporting "80860F09" not
present, which I think is the pwm chip for this platform. But I might be wrong,
since I am not familiar with driver development.

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