[1/3,SRU,Bionic] drm/amd/display: Move wait for hpd ready out from edp power control.

Message ID 20190206192443.9649-2-dan.streetman@canonical.com
State New
Headers show
Series
  • amdgpu with mst WARNING on blanking
Related show

Commit Message

Dan Streetman Feb. 6, 2019, 7:24 p.m.
From: Yongqiang Sun <yongqiang.sun@amd.com>

BugLink: https://bugs.launchpad.net/bugs/1814308

It may take over 200ms for wait hpd ready. To optimize the resume time,
we can power on eDP in init_hw, wait for hpd ready when doing link
training.

also create separate eDP enable function to make sure eDP is powered up
before doing and DPCD access, as HPD low will result in DPDC transaction
failure.

After optimization,
setpowerstate 145ms -> 9.8ms,
DPMS 387ms -> 18.9ms

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Signed-off-by: Tony Cheng <tony.cheng@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(backported from commit 904623ee5936e2226009b2f238f28781aecd2565)
Signed-off-by: Dan Streetman <ddstreet@canonical.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 25 ++++++++++++++++++-
 .../drm/amd/display/dc/core/dc_link_hwss.c    | 11 +-------
 .../drm/amd/display/dc/dce/dce_link_encoder.c | 14 -----------
 .../display/dc/dce110/dce110_hw_sequencer.c   | 12 +++------
 .../display/dc/dce110/dce110_hw_sequencer.h   |  4 +++
 .../amd/display/dc/dcn10/dcn10_hw_sequencer.c |  3 ++-
 .../gpu/drm/amd/display/dc/inc/hw_sequencer.h |  2 ++
 7 files changed, 36 insertions(+), 35 deletions(-)

Patch

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 42a111b9505d..ca0adf46d1e8 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -1271,6 +1271,24 @@  static enum dc_status enable_link_dp(
 	return status;
 }
 
+static enum dc_status enable_link_edp(
+		struct dc_state *state,
+		struct pipe_ctx *pipe_ctx)
+{
+	enum dc_status status;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->sink->link;
+
+	link->dc->hwss.edp_power_control(link->link_enc, true);
+	link->dc->hwss.edp_wait_for_hpd_ready(link->link_enc, true);
+
+	status = enable_link_dp(state, pipe_ctx);
+
+	link->dc->hwss.edp_backlight_control(link, true);
+
+	return status;
+}
+
 static enum dc_status enable_link_dp_mst(
 		struct dc_state *state,
 		struct pipe_ctx *pipe_ctx)
@@ -1746,9 +1764,11 @@  static enum dc_status enable_link(
 	enum dc_status status = DC_ERROR_UNEXPECTED;
 	switch (pipe_ctx->stream->signal) {
 	case SIGNAL_TYPE_DISPLAY_PORT:
-	case SIGNAL_TYPE_EDP:
 		status = enable_link_dp(state, pipe_ctx);
 		break;
+	case SIGNAL_TYPE_EDP:
+		status = enable_link_edp(state, pipe_ctx);
+		break;
 	case SIGNAL_TYPE_DISPLAY_PORT_MST:
 		status = enable_link_dp_mst(state, pipe_ctx);
 		msleep(200);
@@ -2420,6 +2440,9 @@  void core_link_disable_stream(struct pipe_ctx *pipe_ctx, int option)
 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
 		deallocate_mst_payload(pipe_ctx);
 
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_EDP)
+		core_dc->hwss.edp_backlight_control(pipe_ctx->stream->sink->link, false);
+
 	core_dc->hwss.disable_stream(pipe_ctx, option);
 
 	disable_link(pipe_ctx->stream->sink->link, pipe_ctx->stream->signal);
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 9a33b471270a..9852e766d7fb 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
@@ -88,15 +88,7 @@  void dp_enable_link_phy(
 	}
 
 	if (dc_is_dp_sst_signal(signal)) {
-		if (signal == SIGNAL_TYPE_EDP) {
-			link->dc->hwss.edp_power_control(link->link_enc, true);
-			link_enc->funcs->enable_dp_output(
-						link_enc,
-						link_settings,
-						clock_source);
-			link->dc->hwss.edp_backlight_control(link, true);
-		} else
-			link_enc->funcs->enable_dp_output(
+		link_enc->funcs->enable_dp_output(
 						link_enc,
 						link_settings,
 						clock_source);
@@ -138,7 +130,6 @@  void dp_disable_link_phy(struct dc_link *link, enum signal_type signal)
 		dp_receiver_power_ctrl(link, false);
 
 	if (signal == SIGNAL_TYPE_EDP) {
-		link->dc->hwss.edp_backlight_control(link, false);
 		edp_receiver_ready_T9(link);
 		link->link_enc->funcs->disable_output(link->link_enc, signal, link);
 		link->dc->hwss.edp_power_control(link->link_enc, false);
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
index 00c728260616..b24f8c70ced8 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -1087,20 +1087,6 @@  void dce110_link_encoder_disable_output(
 	/* disable encoder */
 	if (dc_is_dp_signal(signal))
 		link_encoder_disable(enc110);
-
-	if (enc110->base.connector.id == CONNECTOR_ID_EDP) {
-		/* power down eDP panel */
-		/* TODO: Power control cause regression, we should implement
-		 * it properly, for now just comment it.
-		 *
-		 * link_encoder_edp_wait_for_hpd_ready(
-			link_enc,
-			link_enc->connector,
-			false);
-
-		 * link_encoder_edp_power_control(
-				link_enc, false); */
-	}
 }
 
 void dce110_link_encoder_dp_set_lane_settings(
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index d844fadcd56f..6847fbe8feff 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -924,8 +924,6 @@  void hwss_edp_power_control(
 				"%s: Skipping Panel Power action: %s\n",
 				__func__, (power_up ? "On":"Off"));
 	}
-
-	hwss_edp_wait_for_hpd_ready(enc, true);
 }
 
 /*todo: cloned in stream enc, fix*/
@@ -1026,11 +1024,9 @@  void dce110_disable_stream(struct pipe_ctx *pipe_ctx, int option)
 	}
 
 	/* blank at encoder level */
-	if (dc_is_dp_signal(pipe_ctx->stream->signal)) {
-		if (pipe_ctx->stream->sink->link->connector_signal == SIGNAL_TYPE_EDP)
-			hwss_edp_backlight_control(link, false);
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
 		pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc);
-	}
+
 	link->link_enc->funcs->connect_dig_be_to_fe(
 			link->link_enc,
 			pipe_ctx->stream_res.stream_enc->id,
@@ -1042,15 +1038,12 @@  void dce110_unblank_stream(struct pipe_ctx *pipe_ctx,
 		struct dc_link_settings *link_settings)
 {
 	struct encoder_unblank_param params = { { 0 } };
-	struct dc_link *link = pipe_ctx->stream->sink->link;
 
 	/* only 3 items below are used by unblank */
 	params.pixel_clk_khz =
 		pipe_ctx->stream->timing.pix_clk_khz;
 	params.link_settings.link_rate = link_settings->link_rate;
 	pipe_ctx->stream_res.stream_enc->funcs->dp_unblank(pipe_ctx->stream_res.stream_enc, &params);
-	if (link->connector_signal == SIGNAL_TYPE_EDP)
-		hwss_edp_backlight_control(link, true);
 }
 
 
@@ -2998,6 +2991,7 @@  static const struct hw_sequencer_funcs dce110_funcs = {
 	.optimize_shared_resources = optimize_shared_resources,
 	.edp_backlight_control = hwss_edp_backlight_control,
 	.edp_power_control = hwss_edp_power_control,
+	.edp_wait_for_hpd_ready = hwss_edp_wait_for_hpd_ready,
 };
 
 void dce110_hw_sequencer_construct(struct dc *dc)
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
index 4d72bb99be93..9e057148f3e1 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
@@ -77,5 +77,9 @@  void hwss_edp_backlight_control(
 	struct dc_link *link,
 	bool enable);
 
+void hwss_edp_wait_for_hpd_ready(
+		struct link_encoder *enc,
+		bool power_up);
+
 #endif /* __DC_HWSS_DCE110_H__ */
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index cc44ce591900..50d9492b57a3 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2973,7 +2973,8 @@  static const struct hw_sequencer_funcs dcn10_funcs = {
 	.ready_shared_resources = ready_shared_resources,
 	.optimize_shared_resources = optimize_shared_resources,
 	.edp_backlight_control = hwss_edp_backlight_control,
-	.edp_power_control = hwss_edp_power_control
+	.edp_power_control = hwss_edp_power_control,
+	.edp_wait_for_hpd_ready = hwss_edp_wait_for_hpd_ready,
 };
 
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
index 8734689a9245..62837e176383 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
@@ -184,6 +184,8 @@  struct hw_sequencer_funcs {
 	void (*edp_backlight_control)(
 			struct dc_link *link,
 			bool enable);
+	void (*edp_wait_for_hpd_ready)(struct link_encoder *enc, bool power_up);
+
 };
 
 void color_space_to_black_color(