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drm/i915: Fix ibx max vswing/preemph

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IBX supports vswing level 3 and pre-emphasis level 3. Don't
limit it to level 2 for those.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200512174145.3186-3-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
This commit is contained in:
Ville Syrjälä
2020-05-12 20:41:40 +03:00
parent d1d08a4994
commit da882e6bb9
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/display/intel_dp.c
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@ -4001,7 +4001,7 @@ 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) ||
(HAS_PCH_CPT(dev_priv) && port != PORT_A))
(HAS_PCH_SPLIT(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;
@ -4019,7 +4019,7 @@ 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) ||
(HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
(HAS_PCH_SPLIT(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;