[Intel-gfx] [PATCH 03/15] drm/i915: Split intel_dp_update_link_train()

[Ander Conselvan de Oliveira]

Separate the bit that writes to DP register in its own function and move
the update of the train_set based on the sink adjust request out. The
objective is to split the generic link training logic from the i915
specific part.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 391a367..027fce7 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3641,20 +3641,25 @@ intel_dp_reset_link_train(struct intel_dp *intel_dp,
 	return intel_dp_set_link_train(intel_dp, dp_train_pat);
 }
 
-static bool
-intel_dp_update_link_train(struct intel_dp *intel_dp,
-			   const uint8_t link_status[DP_LINK_STATUS_SIZE])
+static void
+intel_dp_update_signal_levels(struct intel_dp *intel_dp)
 {
 	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv =
 		to_i915(intel_dig_port->base.base.dev);
-	int ret;
 
-	intel_get_adjust_train(intel_dp, link_status);
 	intel_dp_set_signal_levels(intel_dp, &intel_dp->DP);
 
 	I915_WRITE(intel_dp->output_reg, intel_dp->DP);
 	POSTING_READ(intel_dp->output_reg);
+}
+
+static bool
+intel_dp_update_link_train(struct intel_dp *intel_dp)
+{
+	int ret;
+
+	intel_dp_update_signal_levels(intel_dp);
 
 	ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET,
 				intel_dp->train_set, intel_dp->lane_count);
@@ -3797,7 +3802,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp)
 		voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
 
 		/* Update training set as requested by target */
-		if (!intel_dp_update_link_train(intel_dp, link_status)) {
+		intel_get_adjust_train(intel_dp, link_status);
+		if (!intel_dp_update_link_train(intel_dp)) {
 			DRM_ERROR("failed to update link training\n");
 			break;
 		}
@@ -3886,7 +3892,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp)
 		}
 
 		/* Update training set as requested by target */
-		if (!intel_dp_update_link_train(intel_dp, link_status)) {
+		intel_get_adjust_train(intel_dp, link_status);
+		if (!intel_dp_update_link_train(intel_dp)) {
 			DRM_ERROR("failed to update link training\n");
 			break;
 		}
-- 
2.4.3