From: Takashi Iwai <tiwai@suse.de>
Date: Sat, 11 Aug 2012 06:56:42 +0000 (+0200)
Subject: drm/i915: Fix blank panel at reopening lid
X-Git-Tag: v3.6-rc2~9^2~1^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=770c12312ad617172b1a65b911d3e6564fc5aca8;p=pandora-kernel.git

drm/i915: Fix blank panel at reopening lid

When you reopen the lid on a laptop with PCH, the panel suddenly goes
blank sometimes.  It seems because BLC_PWM_CPU_CTL register is cleared
to zero when BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1 registers are
enabled.

This patch fixes the problem by moving the call of the function setting
BLC_PWM_CPU_CTL after enabling other two registers.

Reported-and-tested-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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