[PATCH 005/104] drm/i915: ivb: fix edp voltage swing reg val

From: Luis Henriques
Date: Mon Sep 30 2013 - 06:38:45 EST -stable review patch. If anyone has any objections, please let me know.


From: Imre Deak <imre.deak@xxxxxxxxx>

commit 77fa4cbd5fa389e28419bbe8ac491b5fdd54840d upstream.

Fix the typo introduced in

commit 1a2eb4604b85c5efb343da8a4dcf41288fcfca85
Author: Keith Packard <keithp@xxxxxxxxxx>
Date: Wed Nov 16 16:26:07 2011 -0800

drm/i915: Hook up Ivybridge eDP

This fixes eDP link-training failures and cases where all voltage swing
/pre-emphasis levels were tried and failed during clock recovery and -
as a fallback - we go on to do channel equalization with the last voltage
swing/pre-emphasis level which will succeed. Both issues can lead to a
blank screen.

- improve commit message

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=64880
Tested-by: Jeremy Moles <cubicool@xxxxxxxxx>
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
drivers/gpu/drm/i915/i915_reg.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 70bfc0f..e275ef6 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3991,7 +3991,7 @@
#define EDP_LINK_TRAIN_600MV_0DB_IVB (0x30 <<22)
#define EDP_LINK_TRAIN_600MV_3_5DB_IVB (0x36 <<22)
#define EDP_LINK_TRAIN_800MV_0DB_IVB (0x38 <<22)
-#define EDP_LINK_TRAIN_800MV_3_5DB_IVB (0x33 <<22)
+#define EDP_LINK_TRAIN_800MV_3_5DB_IVB (0x3e <<22)

/* legacy values */
#define EDP_LINK_TRAIN_500MV_0DB_IVB (0x00 <<22)

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