Commit 493a7081 authored May 30, 2012 by Daniel Vetter

drm/i915: clarify IBX dp workaround



Instead of checking for !CPT, check for IBX to make it clearer that
this is a IBX-specific workaround. No functional change because we
smash the PPT PCH into the HAS_PCH_CPT check and atm DP isn't enabled
on the haswell LPT PCH yet.

See Bspec Vol 3, Part 3, Section 4.[3-5].1 about DP[BCD], bit 30 for
details of this workaround.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent e269f90f

drivers/gpu/drm/i915/intel_dp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1914,7 +1914,7 @@ intel_dp_link_down(struct intel_dp *intel_dp)
		DP \|= DP_LINK_TRAIN_OFF;
		}

		if (!HAS_PCH_CPT(dev) &&
		if (HAS_PCH_IBX(dev) &&
		I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) {
		struct drm_crtc *crtc = intel_dp->base.base.crtc;