linux-kernel - [ 40/73] drm/i915: dont intel_crt

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Date:	Thu,  9 May 2013 15:25:30 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Paulo Zanoni <paulo.r.zanoni@...el.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>
Subject: [ 40/73] drm/i915: dont intel_crt_init on any ULT machines

3.9-stable review patch.  If anyone has any objections, please let me know.

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

From: Paulo Zanoni <paulo.r.zanoni@...el.com>

commit c40c0f5bd5b0f09e4386d2cf26c96c89c45ee539 upstream.

We may have DDI_BUF_CTL(PORT_A) configured with 2 lanes and still not
have CRT, so just check for !IS_ULT. This problem happened on a real
machine and resulted in a very ugly dmesg.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@...el.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/i915/intel_display.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8326,7 +8326,7 @@ static void intel_setup_outputs(struct d
 		I915_WRITE(PFIT_CONTROL, 0);
 	}
 
-	if (!(HAS_DDI(dev) && (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)))
+	if (!IS_ULT(dev))
 		intel_crt_init(dev);
 
 	if (HAS_DDI(dev)) {


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