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From 4471426bb73511848e746ea72a1bfea5709b57e4 Mon Sep 17 00:00:00 2001
From: Jun Lei <Jun.Lei@amd.com>
Date: Fri, 22 Jun 2018 16:51:47 -0400
Subject: [PATCH 4958/5725] drm/amd/display: add new dc debug structure to
track debug data
[why]
Some DTN tests still failing @ 2% Need to reduce.
[how]
add instrumentation code to driver so we can get more information from failed runs.
Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3 +++
drivers/gpu/drm/amd/display/dc/dc.h | 5 +++++
2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index fd73a9c..3bb75b1 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -1028,6 +1028,9 @@ enum link_training_result dc_link_dp_perform_link_training(
lt_settings.lane_settings[0].VOLTAGE_SWING,
lt_settings.lane_settings[0].PRE_EMPHASIS);
+ if (status != LINK_TRAINING_SUCCESS)
+ link->ctx->dc->debug.debug_data.ltFailCount++;
+
return status;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 966e9b9..c106d58 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -260,6 +260,11 @@ struct dc_debug {
bool scl_reset_length10;
bool hdmi20_disable;
+ struct {
+ uint32_t ltFailCount;
+ uint32_t i2cErrorCount;
+ uint32_t auxErrorCount;
+ } debug_data;
};
struct dc_state;
struct resource_pool;
--
2.7.4
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