drm/i915/dp: don't bother with DP PLL for PCH attached eDP

We don't use the CPU DP PLL with PCH attached eDP panels, so don't
bother to enable it.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d4ef20598da8d89d5f496568e754a0b9eb8dc8f7..ada7319f0eaf63343a60711b66d72deca5dc4230 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -775,7 +775,7 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
        if (intel_crtc->pipe == 1 && !HAS_PCH_CPT(dev))
                intel_dp->DP |= DP_PIPEB_SELECT;
 
-       if (is_edp(intel_dp)) {
+       if (is_edp(intel_dp) && !is_pch_edp(intel_dp)) {
                /* don't miss out required setting for eDP */
                intel_dp->DP |= DP_PLL_ENABLE;
                if (adjusted_mode->clock < 200000)