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Commit 1b6e2fd2 authored by Rodrigo Vivi's avatar Rodrigo Vivi
Browse files

drm/i915: Introduce intel_ddi_dp_level. 



No functional changes. This only moves the DP level
selection to a separated function that will be later
used to organize better the vswing sequences.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170829232230.23051-1-rodrigo.vivi@intel.com
parent 385db982

drivers/gpu/drm/i915/intel_ddi.c

+10 −6
Original line number Diff line number Diff line
@@ -2054,18 +2054,22 @@ static uint32_t translate_signal_level(int signal_levels) 
	return 0;

}



static uint32_t intel_ddi_dp_level(struct intel_dp *intel_dp)

{

	uint8_t train_set = intel_dp->train_set[0];

	int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |

					 DP_TRAIN_PRE_EMPHASIS_MASK);



	return translate_signal_level(signal_levels);

}



uint32_t ddi_signal_levels(struct intel_dp *intel_dp)

{

	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);

	struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);

	struct intel_encoder *encoder = &dport->base;

	uint8_t train_set = intel_dp->train_set[0];

	int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |

					 DP_TRAIN_PRE_EMPHASIS_MASK);

	enum port port = dport->port;

	uint32_t level;



	level = translate_signal_level(signal_levels);

	uint32_t level = intel_ddi_dp_level(intel_dp);



	if (IS_GEN9_BC(dev_priv))

		skl_ddi_set_iboost(encoder, level);