[PATCH for stable 3.14 only 0/1] drm/i915: restore QUIRK_NO_PCH_PWM_ENABLE

[Jani Nikula <jani.nikula@intel.com>]

Stable team -

I'd like to hear your opinions on this one. It reverts a commit that
regressed in 3.14, but the revert does not exist upstream. Instead we've
root caused the issue and provided a real fix for upstream, but we're
hesitant to backport that to stable. Functionally the effect of the
revert is similar to the real fix, but only impacts a few models, while
the real fix has much broader scope. See the commit message for details.

Romain, Kamal, I'd appreciate it if you could provide your tested-by
with this on top of 3.14.2 on the failing Dell XPS models. Thanks.

BR,
Jani.


Jani Nikula (1):
  drm/i915: restore QUIRK_NO_PCH_PWM_ENABLE

 drivers/gpu/drm/i915/i915_drv.h      |  1 +
 drivers/gpu/drm/i915/intel_display.c | 16 ++++++++++++++++
 drivers/gpu/drm/i915/intel_panel.c   |  4 ++++
 3 files changed, 21 insertions(+)

-- 
1.9.1