diff mbox

drm/i915/edp: Flush the write before waiting for PLLs

Message ID 1281103867-8982-1-git-send-email-chris@chris-wilson.co.uk (mailing list archive)
State Deferred, archived
Headers show

Commit Message

Chris Wilson Aug. 6, 2010, 2:11 p.m. UTC 
None
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9814182..5cae58a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1570,6 +1570,7 @@  static void ironlake_enable_pll_edp (struct drm_crtc *crtc)
 	dpa_ctl = I915_READ(DP_A);
 	dpa_ctl |= DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
+	POSTING_READ(DP_A);
 	udelay(200);
 }