Commit da882e6b authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Fix ibx max vswing/preemph 



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

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200512174145.3186-3-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
parent d1d08a49

drivers/gpu/drm/i915/display/intel_dp.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

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