diff options
| author | Scot Doyle <lkml14@scotdoyle.com> | 2014-07-03 23:27:50 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-07-09 09:50:05 +0200 |
| commit | 9c72cc6f00d24711ef585772396dd1ae180881a6 (patch) | |
| tree | 682900e1ebd06f9e42998d61f746c29d5e8d5ba3 /drivers/gpu/drm/i915/intel_display.c | |
| parent | dfd7aecfd6d227831d77719379d4c7137f444fee (diff) | |
| download | lwn-9c72cc6f00d24711ef585772396dd1ae180881a6.tar.gz lwn-9c72cc6f00d24711ef585772396dd1ae180881a6.zip | |
drm/i915: quirk asserts controllable backlight presence, overriding VBT
commit c675949ec58ca50d5a3ae3c757892f1560f6e896
Author: Jani Nikula <jani.nikula@intel.com>
Date: Wed Apr 9 11:31:37 2014 +0300
drm/i915: do not setup backlight if not available according to VBT
caused a regression on machines with a misconfigured VBT. Add a quirk to
assert the presence of a controllable backlight. Use it to ignore the VBT
backlight presence check during backlight setup.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813
Tested-by: James Duley <jagduley@gmail.com>
Tested-by: Michael Mullin <masmullin@gmail.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org # 3.15 only
[danvet: Add cc: stable because the regressing commit is in 3.15.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 556c916dbf9d..949c765037ed 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11591,6 +11591,14 @@ static void quirk_invert_brightness(struct drm_device *dev) DRM_INFO("applying inverted panel brightness quirk\n"); } +/* Some VBT's incorrectly indicate no backlight is present */ +static void quirk_backlight_present(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + dev_priv->quirks |= QUIRK_BACKLIGHT_PRESENT; + DRM_INFO("applying backlight present quirk\n"); +} + struct intel_quirk { int device; int subsystem_vendor; |