diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_ums.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_ums.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_ums.c b/drivers/gpu/drm/i915/i915_ums.c index 967da4772c44..caa18e855815 100644 --- a/drivers/gpu/drm/i915/i915_ums.c +++ b/drivers/gpu/drm/i915/i915_ums.c @@ -270,6 +270,18 @@ void i915_save_display_reg(struct drm_device *dev) } /* FIXME: regfile.save TV & SDVO state */ + /* Backlight */ + if (HAS_PCH_SPLIT(dev)) { + dev_priv->regfile.saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1); + dev_priv->regfile.saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2); + dev_priv->regfile.saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL); + dev_priv->regfile.saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2); + } else { + dev_priv->regfile.saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL); + if (INTEL_INFO(dev)->gen >= 4) + dev_priv->regfile.saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2); + } + return; } @@ -280,6 +292,21 @@ void i915_restore_display_reg(struct drm_device *dev) int dpll_b_reg, fpb0_reg, fpb1_reg; int i; + /* Backlight */ + if (HAS_PCH_SPLIT(dev)) { + I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->regfile.saveBLC_PWM_CTL); + I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2); + /* NOTE: BLC_PWM_CPU_CTL must be written after BLC_PWM_CPU_CTL2; + * otherwise we get blank eDP screen after S3 on some machines + */ + I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->regfile.saveBLC_CPU_PWM_CTL2); + I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->regfile.saveBLC_CPU_PWM_CTL); + } else { + if (INTEL_INFO(dev)->gen >= 4) + I915_WRITE(BLC_PWM_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2); + I915_WRITE(BLC_PWM_CTL, dev_priv->regfile.saveBLC_PWM_CTL); + } + /* Display port ratios (must be done before clock is set) */ if (SUPPORTS_INTEGRATED_DP(dev)) { I915_WRITE(_PIPEA_DATA_M_G4X, dev_priv->regfile.savePIPEA_GMCH_DATA_M); |