From 4471426bb73511848e746ea72a1bfea5709b57e4 Mon Sep 17 00:00:00 2001 From: Jun Lei 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 Reviewed-by: Tony Cheng Acked-by: Leo Li Signed-off-by: Alex Deucher --- 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