Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nftables

[karo-tx-linux.git] / drivers / gpu / drm / i915 / intel_panel.c

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index f161ac02c4f6e613efbfc7f763cbb3566dc75248..e6f782d1c6696d94fe4d4a80cf7f4d6ee6b5c7d7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -451,7 +451,9 @@ static u32 intel_panel_get_backlight(struct drm_device *dev,
 
        spin_lock_irqsave(&dev_priv->backlight.lock, flags);
 
-       if (HAS_PCH_SPLIT(dev)) {
+       if (IS_BROADWELL(dev)) {
+               val = I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
+       } else if (HAS_PCH_SPLIT(dev)) {
                val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
        } else {
                if (IS_VALLEYVIEW(dev))
@@ -479,6 +481,13 @@ static u32 intel_panel_get_backlight(struct drm_device *dev,
        return val;
 }
 
+static void intel_bdw_panel_set_backlight(struct drm_device *dev, u32 level)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
+       I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
+}
+
 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -496,7 +505,9 @@ static void intel_panel_actually_set_backlight(struct drm_device *dev,
        DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
        level = intel_panel_compute_brightness(dev, pipe, level);
 
-       if (HAS_PCH_SPLIT(dev))
+       if (IS_BROADWELL(dev))
+               return intel_bdw_panel_set_backlight(dev, level);
+       else if (HAS_PCH_SPLIT(dev))
                return intel_pch_panel_set_backlight(dev, level);
 
        if (is_backlight_combination_mode(dev)) {
@@ -666,7 +677,16 @@ void intel_panel_enable_backlight(struct intel_connector *connector)
                POSTING_READ(reg);
                I915_WRITE(reg, tmp | BLM_PWM_ENABLE);
 
-               if (HAS_PCH_SPLIT(dev) &&
+               if (IS_BROADWELL(dev)) {
+                       /*
+                        * Broadwell requires PCH override to drive the PCH
+                        * backlight pin. The above will configure the CPU
+                        * backlight pin, which we don't plan to use.
+                        */
+                       tmp = I915_READ(BLC_PWM_PCH_CTL1);
+                       tmp |= BLM_PCH_OVERRIDE_ENABLE | BLM_PCH_PWM_ENABLE;
+                       I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
+               } else if (HAS_PCH_SPLIT(dev) &&
                    !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) {
                        tmp = I915_READ(BLC_PWM_PCH_CTL1);
                        tmp |= BLM_PCH_PWM_ENABLE;