[Bug 97178] [drm:pwm_setup_backlight [i915]] *ERROR* Failed to own the pwm chip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97178

yann <yann.argotti at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      i915 platform|                            |BSW/CHT

--- Comment #1 from yann <yann.argotti at intel.com> ---
I guess that following change in drivers/gpu/drm/i915/intel_panel.c, line 1748
on top of kernel 4.6.x (check
https://lists.freedesktop.org/archives/intel-gfx/2016-February/087151.html)
-               if (dev_priv->vbt.has_mipi) {
+               if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) {

should solve your issue.

FYI this is not part of 4.6.x kernel but part of 4.7 or our drm-intel-nightly.
So either you upgrade to a more recent kernel or apply that change

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