diff options
| author | Kamal Mostafa <kamal@canonical.com> | 2013-07-19 15:02:01 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-04 16:51:11 +0800 |
| commit | f12155987bdc8d175b41b2fcbd88e8788c1af92d (patch) | |
| tree | 31a89b7719c9c3c7f939903ad0f35a12bff7e2e6 /drivers/gpu/drm/i915/intel_display.c | |
| parent | 19a280cac37e30243023a7f53651504a135ac960 (diff) | |
drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight
commit e85843bec6c2ea7c10ec61238396891cc2b753a9 upstream.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=47941
BugLink: https://bugs.launchpad.net/bugs/1163720
BugLink: https://bugs.launchpad.net/bugs/1162026
Some machines suffer from non-functional backlight controls if
BLM_PCH_PWM_ENABLE is set, so provide a quirk to avoid doing so.
Apply this quirk to Dell XPS 13 models.
Tested-by: Eric Griffith <EGriffith92@gmail.com>
Tested-by: Kent Baxley <kent.baxley@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index d7ff3afbf61..e1f4e6edaa4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8917,6 +8917,17 @@ static void quirk_invert_brightness(struct drm_device *dev) DRM_INFO("applying inverted panel brightness quirk\n"); } +/* + * Some machines (Dell XPS13) suffer broken backlight controls if + * BLM_PCH_PWM_ENABLE is set. + */ +static void quirk_no_pcm_pwm_enable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + dev_priv->quirks |= QUIRK_NO_PCH_PWM_ENABLE; + DRM_INFO("applying no-PCH_PWM_ENABLE quirk\n"); +} + struct intel_quirk { int device; int subsystem_vendor; @@ -8986,6 +8997,11 @@ static struct intel_quirk intel_quirks[] = { /* Acer Aspire 4736Z */ { 0x2a42, 0x1025, 0x0260, quirk_invert_brightness }, + + /* Dell XPS13 HD Sandy Bridge */ + { 0x0116, 0x1028, 0x052e, quirk_no_pcm_pwm_enable }, + /* Dell XPS13 HD and XPS13 FHD Ivy Bridge */ + { 0x0166, 0x1028, 0x058b, quirk_no_pcm_pwm_enable }, }; static void intel_init_quirks(struct drm_device *dev) |