[PATCH 2/6] drm/amd/display: Fix link retraining hw sequence for auto test

[Harry Wentland]

From: Hersen Wu <hersenxs.wu at amd.com>

Change-Id: Ia0e5ede4f3790c32c292ac381d6d373f507640b0
Signed-off-by: Hersen Wu <hersenxs.wu at amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c           |  4 +---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c   |  4 ++--
 drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 27 ++++------------------
 drivers/gpu/drm/amd/display/dc/inc/link_hwss.h     |  4 +---
 4 files changed, 9 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index ad1ce600a165..a7c6c980927e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -366,9 +366,7 @@ static void set_preferred_link_settings(struct dc *dc,
 				link_setting->lane_count;
 	core_link->public.verified_link_cap.link_rate =
 				link_setting->link_rate;
-	dp_retrain_link_physi(core_link,
-			link_setting,
-			false);
+	dp_retrain_link_dp_test(core_link, link_setting, false);
 }
 
 static void enable_hpd(const struct dc_link *link)
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 a4b6a6a571df..3d5871dfc8e6 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
@@ -1532,7 +1532,7 @@ static bool handle_hpd_irq_psr_sink(const struct core_link *link)
 
 static void dp_test_send_link_training(struct core_link *link)
 {
-	struct dc_link_settings link_settings;
+	struct dc_link_settings link_settings = {0};
 
 	core_link_read_dpcd(
 			link,
@@ -1549,7 +1549,7 @@ static void dp_test_send_link_training(struct core_link *link)
 	link->public.verified_link_cap.lane_count = link_settings.lane_count;
 	link->public.verified_link_cap.link_rate = link_settings.link_rate;
 
-	dp_retrain_link(link);
+	dp_retrain_link_dp_test(link, &link_settings, false);
 }
 
 static void dp_test_send_phy_test_pattern(struct core_link *link)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
index f870a0e72074..e287584ade29 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
@@ -200,28 +200,7 @@ void dp_set_hw_test_pattern(
 	encoder->funcs->dp_set_phy_pattern(encoder, &pattern_param);
 }
 
-void dp_retrain_link(struct core_link *link)
-{
-	struct pipe_ctx *pipes = link->dc->current_context->res_ctx.pipe_ctx;
-	unsigned int i;
-
-	for (i = 0; i < MAX_PIPES; i++) {
-		if (pipes[i].stream_enc != NULL) {
-			dm_delay_in_microseconds(link->ctx, 100);
-			pipes->stream_enc->funcs->dp_blank(pipes[i].stream_enc);
-			link->dc->hwss.disable_stream(&pipes[i]);
-			dc_link_dp_perform_link_training(
-					&link->public,
-					&link->public.verified_link_cap,
-					true);
-			link->dc->hwss.enable_stream(&pipes[i]);
-			link->dc->hwss.unblank_stream(&pipes[i],
-					&link->public.verified_link_cap);
-		}
-	}
-}
-
-void dp_retrain_link_physi(struct core_link *link,
+void dp_retrain_link_dp_test(struct core_link *link,
 			struct dc_link_settings *link_setting,
 			bool skip_video_pattern)
 {
@@ -240,6 +219,10 @@ void dp_retrain_link_physi(struct core_link *link,
 			pipes[i].stream_enc->funcs->dp_blank(
 					pipes[i].stream_enc);
 
+			/* disable any test pattern that might be active */
+			dp_set_hw_test_pattern(link,
+					DP_TEST_PATTERN_VIDEO_MODE, NULL, 0);
+
 			dp_receiver_power_ctrl(link, false);
 
 			link->link_enc->funcs->disable_output(
diff --git a/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h b/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h
index 30831c54878b..75d10e93b002 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h
@@ -68,9 +68,7 @@ void dp_set_hw_test_pattern(
 
 enum dp_panel_mode dp_get_panel_mode(struct core_link *link);
 
-void dp_retrain_link(struct core_link *link);
-
-void dp_retrain_link_physi(struct core_link *link,
+void dp_retrain_link_dp_test(struct core_link *link,
 		struct dc_link_settings *link_setting,
 		bool skip_video_pattern);
 
-- 
2.9.3