From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Tue, 1 Oct 2013 15:02:20 +0000 (+0300)
Subject: drm/i915: WARN if primary plane state doesn't match expectations
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0037f71c4b7fc0cc70714c5a076f54f348c04dea;p=linux-beck.git

drm/i915: WARN if primary plane state doesn't match expectations

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a2acf79c365d..2e3289c37034 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1840,6 +1840,8 @@ static void intel_enable_primary_plane(struct drm_i915_private *dev_priv,
 	/* If the pipe isn't enabled, we can't pump pixels and may hang */
 	assert_pipe_enabled(dev_priv, pipe);
 
+	WARN(!intel_crtc->primary_disabled, "Primary plane already enabled\n");
+
 	intel_crtc->primary_disabled = false;
 
 	reg = DSPCNTR(plane);
@@ -1868,6 +1870,8 @@ static void intel_disable_primary_plane(struct drm_i915_private *dev_priv,
 	int reg;
 	u32 val;
 
+	WARN(intel_crtc->primary_disabled, "Primary plane already disabled\n");
+
 	intel_crtc->primary_disabled = true;
 
 	reg = DSPCNTR(plane);