drm/i915: Enable per-lane drive settings for icl+

Now that the link buf_trans, link training, and the
combo/mg/dkl/snps phy programming are all fixed up we can
allow per-lane DP drive settings on icl+. Make it so.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211006204937.30774-13-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index a72f2dc..e264467 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -301,7 +301,10 @@ static u8 intel_dp_phy_preemph_max(struct intel_dp *intel_dp,
 static bool has_per_lane_signal_levels(struct intel_dp *intel_dp,
                                       enum drm_dp_phy dp_phy)
 {
-       return !intel_dp_phy_is_downstream_of_source(intel_dp, dp_phy);
+       struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+       return !intel_dp_phy_is_downstream_of_source(intel_dp, dp_phy) ||
+               DISPLAY_VER(i915) >= 11;
 }
 
 /* 128b/132b */