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| author | Jani Nikula <jani.nikula@intel.com> | 2014-06-09 18:24:34 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2014-06-11 11:06:43 +0300 |
| commit | 2e7eeeb59a92d09144fdb7d2dc1af77a10a7945b (patch) | |
| tree | 30e18ed5300fb6958dcc7ad94f8ca2700441b0f7 /drivers/gpu/drm/i915/i915_gpu_error.c | |
| parent | 2b85886a5457f5c5dbcd32edbd4e6bba0f4e8678 (diff) | |
| download | lwn-2e7eeeb59a92d09144fdb7d2dc1af77a10a7945b.tar.gz lwn-2e7eeeb59a92d09144fdb7d2dc1af77a10a7945b.zip | |
drm/i915: set backlight duty cycle after backlight enable for gen4
For reasons I can't claim to fully understand gen4 seems to require
backlight duty cycle setting after the backlight has been enabled, or
else black screen follows. I don't have documentation for the correct
sequence on gen4 either. Confirmed on Dell Latitude D630 and MacBook4,1.
This fixes a regression introduced by
commit b35684b8fa94e04f55fd38bf672b737741d2f9e2
Author: Jani Nikula <jani.nikula@intel.com>
Date: Thu Nov 14 12:13:41 2013 +0200
drm/i915: do full backlight setup at enable time
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=75791
Reported-and-tested-by: mcy@lm7.fr
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79423
Reported-and-tested-by: Marc Milgram <mmilgram@redhat.com>
Cc: Stable <stable@vger.kernel.org> # 3.14+
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gpu_error.c')
0 files changed, 0 insertions, 0 deletions