From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
cpt/ppt support pre-emphasis level 3. Let's actually declare
support for it, instead of clamping things to level 2.
Also tweak the if-ladder in intel_dp_voltage_max() to match
intel_dp_pre_emphasis_max() to make it easier to compare them.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 67723dede1d1..7541264ff4e9 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3957,12 +3957,11 @@ intel_dp_voltage_max(struct intel_dp *intel_dp)
if (HAS_DDI(dev_priv))
return intel_ddi_dp_voltage_max(encoder);
- else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+ else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
+ (HAS_PCH_CPT(dev_priv) && port != PORT_A))
return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A)
return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
- else if (HAS_PCH_CPT(dev_priv) && port != PORT_A)
- return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
else
return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
}
@@ -3976,7 +3975,8 @@ intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, u8 voltage_swing)
if (HAS_DDI(dev_priv)) {
return intel_ddi_dp_pre_emphasis_max(encoder, voltage_swing);
- } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+ } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
+ (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
return DP_TRAIN_PRE_EMPH_LEVEL_3;
--
2.26.2
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