[PATCHv2,2/6,SRU,Bionic] drm/amd/display: Move wait for hpd ready out from edp power control.

Message ID 20190211133107.11253-3-dan.streetman@canonical.com
State New
Headers show
Series
  • amdgpu with mst WARNING on blanking
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Commit Message

Dan Streetman Feb. 11, 2019, 1:31 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>
(cherry picked 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 | 15 -----------
 .../display/dc/dce110/dce110_hw_sequencer.c   | 16 +++---------
 .../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, 37 insertions(+), 39 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 2bcd19328329..6ed074b5fa46 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, true);
+	link->dc->hwss.edp_wait_for_hpd_ready(link, 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 f2902569be2e..2096f2a179f2 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, 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->dc->hwss.edp_power_control(link, 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 e0e50f9005d6..d886328f2b9c 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
@@ -1082,21 +1082,6 @@  void dce110_link_encoder_disable_output(
 	/* disable encoder */
 	if (dc_is_dp_signal(signal))
 		link_encoder_disable(enc110);
-
-	/*
-	 * TODO: Power control cause regression, we should implement
-	 * it properly, for now just comment it.
-	 */
-//	if (enc110->base.connector.id == CONNECTOR_ID_EDP) {
-//		/* power down eDP panel */
-//		link_encoder_edp_wait_for_hpd_ready(
-//				enc,
-//				enc->connector,
-//				false);
-//
-//		link_encoder_edp_power_control(
-//				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 97dfe9e2f1ac..21df1a7aa681 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(link, 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);
 }
 
 
@@ -1396,10 +1389,8 @@  static void power_down_encoders(struct dc *dc)
 
 			if (!dc->links[i]->wa_flags.dp_keep_receiver_powered)
 				dp_receiver_power_ctrl(dc->links[i], false);
-			if (connector_id == CONNECTOR_ID_EDP) {
+			if (connector_id == CONNECTOR_ID_EDP)
 				signal = SIGNAL_TYPE_EDP;
-				hwss_edp_backlight_control(dc->links[i], false);
-			}
 		}
 
 		dc->links[i]->link_enc->funcs->disable_output(
@@ -3004,6 +2995,7 @@  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 2dd6ac637572..fc637647f643 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 dc_link *link,
+		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 7009b4ab321e..cf09afc21d1e 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
@@ -2976,7 +2976,8 @@  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 859521d6fc1c..a84f9ffe9777 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 dc_link *link, bool power_up);
+
 };
 
 void color_space_to_black_color(