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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-05-30 12:31:56 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-06-01 21:38:59 +0200 |
| commit | 493a708179469e3978e50f59902e9d47b6f3dabd (patch) | |
| tree | 00e4d9c27ead91c34c990c7d356730adb89a2ffb /drivers/gpu/drm/i915/intel_dp.c | |
| parent | e269f90f3d3f7c70cf661c660bf445597261f54a (diff) | |
| download | op-kernel-dev-493a708179469e3978e50f59902e9d47b6f3dabd.zip op-kernel-dev-493a708179469e3978e50f59902e9d47b6f3dabd.tar.gz | |
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>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index c71e789..ade98e0 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -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; |
