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authorDaniel Vetter <daniel.vetter@ffwll.ch>2012-03-30 22:14:05 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-04-01 12:32:32 +0200
commite77166b5a653728f312d07e60a80819d1c54fca4 (patch)
tree52c6517f27f31b2b2b216a08f1e8d0978ccf7456
parent1c7eaac737e4cca24703531ebcb566afc3ed285f (diff)
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drm/i915: properly clear SSC1 bit in the pch refclock init code
Noticed by staring at intel_reg_dumper diffs. Unfortunately it does not seem to completely fix the bug. Still, it's good to get this right, and maybe it helps someplace else. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47117 Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r--drivers/gpu/drm/i915/intel_display.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ec6ea92da53..91b35fd1db8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5539,7 +5539,8 @@ void ironlake_init_pch_refclk(struct drm_device *dev)
if (intel_panel_use_ssc(dev_priv) && can_ssc) {
DRM_DEBUG_KMS("Using SSC on panel\n");
temp |= DREF_SSC1_ENABLE;
- }
+ } else
+ temp &= ~DREF_SSC1_ENABLE;
/* Get SSC going before enabling the outputs */
I915_WRITE(PCH_DREF_CONTROL, temp);