[Intel-gfx] [PATCH] drm/i915: properly clear SSC1 bit in the pch refclock init code
Daniel Vetter
daniel.vetter at ffwll.ch
Fri Mar 30 22:14:05 CEST 2012
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 at ffwll.ch>
---
drivers/gpu/drm/i915/intel_display.c | 3 ++-
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 a7c2ddc..86a9e73 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5560,7 +5560,8 @@ 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);
--
1.7.9.1
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