[Intel-gfx] [PATCH] drm/i915: don't clear pfit at startup any more

[Daniel Vetter]

Since

commit 24a1f16de97c4cf0029d9acd04be06db32208726
Author: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Date:   Fri Feb 8 16:35:37 2013 +0200

    drm/i915: disable shared panel fitter for pipe

We clear the single panel fitter when disabling the pipe it's attached to, so no
need to additionally clear it when there's no lvds port detected. Since that
alone isn't good enough e.g. when an external monitor is connected and the bios
uses the panel fitter on that output.

v2: Remove the now unused has_lvds variable and drop the bool return
value from intel_lvds_init, both suggest by Mika Kuoppala.

Cc: Mika Kuoppala <mika.kuoppala at intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |    7 +------
 drivers/gpu/drm/i915/intel_drv.h     |    2 +-
 drivers/gpu/drm/i915/intel_lvds.c    |   20 ++++++++++----------
 3 files changed, 12 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f73fc3d..00f3d0b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8335,13 +8335,8 @@ static void intel_setup_outputs(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_encoder *encoder;
 	bool dpd_is_edp = false;
-	bool has_lvds;
 
-	has_lvds = intel_lvds_init(dev);
-	if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
-		/* disable the panel fitter on everything but LVDS */
-		I915_WRITE(PFIT_CONTROL, 0);
-	}
+	intel_lvds_init(dev);
 
 	if (!(HAS_DDI(dev) && (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)))
 		intel_crt_init(dev);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index e6f84d0..9e29223 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -459,7 +459,7 @@ extern void intel_tv_init(struct drm_device *dev);
 extern void intel_mark_busy(struct drm_device *dev);
 extern void intel_mark_fb_busy(struct drm_i915_gem_object *obj);
 extern void intel_mark_idle(struct drm_device *dev);
-extern bool intel_lvds_init(struct drm_device *dev);
+extern void intel_lvds_init(struct drm_device *dev);
 extern bool intel_is_dual_link_lvds(struct drm_device *dev);
 extern void intel_dp_init(struct drm_device *dev, int output_reg,
 			  enum port port);
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 6ff145f..5eb74de 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -1037,7 +1037,7 @@ static bool intel_lvds_supported(struct drm_device *dev)
  * Create the connector, register the LVDS DDC bus, and try to figure out what
  * modes we can display on the LVDS panel (if present).
  */
-bool intel_lvds_init(struct drm_device *dev)
+void intel_lvds_init(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_lvds_encoder *lvds_encoder;
@@ -1055,35 +1055,35 @@ bool intel_lvds_init(struct drm_device *dev)
 	u8 pin;
 
 	if (!intel_lvds_supported(dev))
-		return false;
+		return;
 
 	/* Skip init on machines we know falsely report LVDS */
 	if (dmi_check_system(intel_no_lvds))
-		return false;
+		return;
 
 	pin = GMBUS_PORT_PANEL;
 	if (!lvds_is_present_in_vbt(dev, &pin)) {
 		DRM_DEBUG_KMS("LVDS is not present in VBT\n");
-		return false;
+		return;
 	}
 
 	if (HAS_PCH_SPLIT(dev)) {
 		if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
-			return false;
+			return;
 		if (dev_priv->edp.support) {
 			DRM_DEBUG_KMS("disable LVDS for eDP support\n");
-			return false;
+			return;
 		}
 	}
 
 	lvds_encoder = kzalloc(sizeof(struct intel_lvds_encoder), GFP_KERNEL);
 	if (!lvds_encoder)
-		return false;
+		return;
 
 	lvds_connector = kzalloc(sizeof(struct intel_lvds_connector), GFP_KERNEL);
 	if (!lvds_connector) {
 		kfree(lvds_encoder);
-		return false;
+		return;
 	}
 
 	lvds_encoder->attached_connector = lvds_connector;
@@ -1257,7 +1257,7 @@ out:
 	intel_panel_init(&intel_connector->panel, fixed_mode);
 	intel_panel_setup_backlight(connector);
 
-	return true;
+	return;
 
 failed:
 	DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
@@ -1267,5 +1267,5 @@ failed:
 		drm_mode_destroy(dev, fixed_mode);
 	kfree(lvds_encoder);
 	kfree(lvds_connector);
-	return false;
+	return;
 }
-- 
1.7.10.4