[Intel-gfx] [PATCH 12/16] drm/i915: Enable per-lane drive settings for icl+

Ville Syrjala
2021-10-06T20:50:26Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

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>
---
drivers/gpu/drm/i915/display/intel_dp_link_training.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

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 1a943ae38a6b..279371237fe9 100644
--- 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;
}

static u8 intel_dp_get_lane_adjust_train(struct intel_dp *intel_dp,
--
2.32.0