Commit e77166b5 authored Mar 30, 2012 by Daniel Vetter

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>

parent 1c7eaac7

drivers/gpu/drm/i915/intel_display.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);