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>

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 54e3964..701a882 100644 (file)
--- 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 85f5ddd..f74ad8e 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -259,6 +259,11 @@ 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;