drm/i915: quirk asserts controllable backlight presence, overriding VBT

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / intel_display.c

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5f285fba4e41143e1e0d3001605e8fc955ce5446..949c765037edfc34980e684a9c5bb435669283df 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2087,6 +2087,7 @@ void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
 static void intel_enable_primary_hw_plane(struct drm_i915_private *dev_priv,
                                          enum plane plane, enum pipe pipe)
 {
+       struct drm_device *dev = dev_priv->dev;
        struct intel_crtc *intel_crtc =
                to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
        int reg;
@@ -2106,6 +2107,14 @@ static void intel_enable_primary_hw_plane(struct drm_i915_private *dev_priv,
 
        I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
        intel_flush_primary_plane(dev_priv, plane);
+
+       /*
+        * BDW signals flip done immediately if the plane
+        * is disabled, even if the plane enable is already
+        * armed to occur at the next vblank :(
+        */
+       if (IS_BROADWELL(dev))
+               intel_wait_for_vblank(dev, intel_crtc->pipe);
 }
 
 /**
@@ -11088,6 +11097,22 @@ const char *intel_output_name(int output)
        return names[output];
 }
 
+static bool intel_crt_present(struct drm_device *dev)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+
+       if (IS_ULT(dev))
+               return false;
+
+       if (IS_CHERRYVIEW(dev))
+               return false;
+
+       if (IS_VALLEYVIEW(dev) && !dev_priv->vbt.int_crt_support)
+               return false;
+
+       return true;
+}
+
 static void intel_setup_outputs(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -11096,7 +11121,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 
        intel_lvds_init(dev);
 
-       if (!IS_ULT(dev) && !IS_CHERRYVIEW(dev) && dev_priv->vbt.int_crt_support)
+       if (intel_crt_present(dev))
                intel_crt_init(dev);
 
        if (HAS_DDI(dev)) {
@@ -11566,6 +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;