[Intel-gfx] [PATCH v2 5/5] drm/i915: Call intel_dp_dump_link_status() for CR failures

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

I suppose intel_dp_dump_link_status() might be useful for diagnosing
link training failures. Hoever we only call from the channel EQ phase
currently. Let's call it from the CR phase as well.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp_link_training.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index 18f4b469766e..c92044710012 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -649,6 +649,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp,
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 	u8 old_link_status[DP_LINK_STATUS_SIZE] = {};
 	int voltage_tries, cr_tries, max_cr_tries;
+	u8 link_status[DP_LINK_STATUS_SIZE];
 	bool max_vswing_reached = false;
 	char phy_name[10];
 
@@ -678,8 +679,6 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp,
 
 	voltage_tries = 1;
 	for (cr_tries = 0; cr_tries < max_cr_tries; ++cr_tries) {
-		u8 link_status[DP_LINK_STATUS_SIZE];
-
 		intel_dp_link_training_clock_recovery_delay(intel_dp, dp_phy);
 
 		if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, dp_phy,
@@ -697,6 +696,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp,
 		}
 
 		if (voltage_tries == 5) {
+			intel_dp_dump_link_status(intel_dp, dp_phy, link_status);
 			drm_dbg_kms(&i915->drm,
 				    "[ENCODER:%d:%s][%s] Same voltage tried 5 times\n",
 				    encoder->base.base.id, encoder->base.name, phy_name);
@@ -704,6 +704,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp,
 		}
 
 		if (max_vswing_reached) {
+			intel_dp_dump_link_status(intel_dp, dp_phy, link_status);
 			drm_dbg_kms(&i915->drm,
 				    "[ENCODER:%d:%s][%s] Max Voltage Swing reached\n",
 				    encoder->base.base.id, encoder->base.name, phy_name);
@@ -732,6 +733,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp,
 			max_vswing_reached = true;
 	}
 
+	intel_dp_dump_link_status(intel_dp, dp_phy, link_status);
 	drm_err(&i915->drm,
 		"[ENCODER:%d:%s][%s] Failed clock recovery %d times, giving up!\n",
 		encoder->base.base.id, encoder->base.name, phy_name, max_cr_tries);
-- 
2.32.0