linux-kernel - [37/91] drm/i915/edp: Flush the write before waiting for PLLs

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Message-Id: <20100824224215.257144673@clark.site>
Date:	Tue, 24 Aug 2010 15:41:59 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Eric Anholt <eric@...olt.net>
Subject: [37/91] drm/i915/edp: Flush the write before waiting for PLLs

2.6.34-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Chris Wilson <chris@...is-wilson.co.uk>

commit 5ddb954b9ee50824977d2931e0ff58b3050b337d upstream.

Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@...olt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/i915/intel_display.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1470,6 +1470,7 @@ static void ironlake_enable_pll_edp (str
 	dpa_ctl = I915_READ(DP_A);
 	dpa_ctl |= DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
+	POSTING_READ(DP_A);
 	udelay(200);
 }
 


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