diff options
| author | Kamal Mostafa <kamal@canonical.com> | 2013-07-19 15:02:01 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-09-10 01:57:05 +0100 |
| commit | 3bc95d6459a7c185f814ac2c8ba0ccda351cdc08 (patch) | |
| tree | 437ae5eeb7ea7ff51a9a17342b08339a3688a459 /drivers/gpu/drm/i915 | |
| parent | bb8d7bf7a9f112926e8b32c8c127136dea47f03f (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>
[ kamal: backport to 3.2 ]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 16 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lvds.c | 3 |
3 files changed, 19 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 144d37cbcc6..61274bf52e5 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -275,6 +275,7 @@ enum intel_pch { #define QUIRK_PIPEA_FORCE (1<<0) #define QUIRK_LVDS_SSC_DISABLE (1<<1) #define QUIRK_INVERT_BRIGHTNESS (1<<2) +#define QUIRK_NO_PCH_PWM_ENABLE (1<<3) struct intel_fbdev; struct intel_fbc_work; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index cfbb893f4e8..ee29c1fb7fb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8842,6 +8842,17 @@ static void quirk_invert_brightness(struct drm_device *dev) dev_priv->quirks |= QUIRK_INVERT_BRIGHTNESS; } +/* + * 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; @@ -8916,6 +8927,11 @@ struct intel_quirk intel_quirks[] = { /* Acer/Packard Bell NCL20 */ { 0x2a42, 0x1025, 0x034b, 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) diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index 2ffa740294b..744dccf7a90 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -1075,7 +1075,8 @@ bool intel_lvds_init(struct drm_device *dev) goto failed; out: - if (HAS_PCH_SPLIT(dev)) { + if (HAS_PCH_SPLIT(dev) && + !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) { u32 pwm; pipe = (I915_READ(PCH_LVDS) & LVDS_PIPEB_SELECT) ? 1 : 0; |