[PATCH 33/73] drm/amd/display: send display_count msg so SMU can enter S0i2

[Harry Wentland]

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

SMU can future lower voltages in long idle case when all display is off.

If all display output is turned off via DPMS, send display_count = 0
after all output are turned off.

otherwise send display_count msg before turning on display to make sure
SMU exit S0i2 state.  before is not neccessary as we are out of S0i2
when driver execute code, but send message before anyways for correctness.

Change-Id: Ic2a3c808eab514c42e0691e694767b0139579b78
Signed-off-by: Hersen Wu <hersenxs.wu at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c                    | 12 ++++++++++--
 drivers/gpu/drm/amd/display/dc/dce100/dce100_hw_sequencer.c |  2 ++
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c |  5 +++++
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c   |  2 ++
 drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h           |  4 ++++
 5 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index d969bf116645..d6938bf19c8f 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -383,11 +383,19 @@ void set_dpms(
 
 	if (stream->dpms_off != dpms_off) {
 		stream->dpms_off = dpms_off;
-		if (dpms_off)
+
+		if (dpms_off) {
 			core_link_disable_stream(pipe_ctx,
 					KEEP_ACQUIRED_RESOURCE);
-		else
+
+			dc->hwss.pplib_apply_display_requirements(
+					dc, dc->current_state);
+		} else {
+			dc->hwss.pplib_apply_display_requirements(
+					dc, dc->current_state);
+
 			core_link_enable_stream(dc->current_state, pipe_ctx);
+		}
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/dc/dce100/dce100_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce100/dce100_hw_sequencer.c
index e7a694835e3e..469af0587604 100644
--- a/drivers/gpu/drm/amd/display/dc/dce100/dce100_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce100/dce100_hw_sequencer.c
@@ -148,5 +148,7 @@ void dce100_hw_sequencer_construct(struct dc *dc)
 
 	dc->hwss.enable_display_power_gating = dce100_enable_display_power_gating;
 	dc->hwss.set_bandwidth = dce100_set_bandwidth;
+	dc->hwss.pplib_apply_display_requirements =
+			dce100_pplib_apply_display_requirements;
 }
 
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 8d9a6b504046..bf76698b30c1 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
@@ -2593,6 +2593,10 @@ void dce110_fill_display_configs(
 
 		ASSERT(pipe_ctx != NULL);
 
+		/* only notify active stream */
+		if (stream->dpms_off)
+			continue;
+
 		num_cfgs++;
 		cfg->signal = pipe_ctx->stream->signal;
 		cfg->pipe_idx = pipe_ctx->pipe_idx;
@@ -3022,6 +3026,7 @@ static const struct hw_sequencer_funcs dce110_funcs = {
 	.wait_for_mpcc_disconnect = dce110_wait_for_mpcc_disconnect,
 	.ready_shared_resources = ready_shared_resources,
 	.optimize_shared_resources = optimize_shared_resources,
+	.pplib_apply_display_requirements = pplib_apply_display_requirements,
 	.edp_backlight_control = hwss_edp_backlight_control,
 	.edp_power_control = hwss_edp_power_control,
 };
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 5d1fb1c297a3..73e7afb360b1 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
@@ -2567,6 +2567,8 @@ static const struct hw_sequencer_funcs dcn10_funcs = {
 	.wait_for_mpcc_disconnect = dcn10_wait_for_mpcc_disconnect,
 	.ready_shared_resources = ready_shared_resources,
 	.optimize_shared_resources = optimize_shared_resources,
+	.pplib_apply_display_requirements =
+			dcn10_pplib_apply_display_requirements,
 	.edp_backlight_control = hwss_edp_backlight_control,
 	.edp_power_control = hwss_edp_power_control
 };
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 19cfca91bb4e..1d8852683f1f 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
@@ -183,12 +183,16 @@ struct hw_sequencer_funcs {
 
 	void (*ready_shared_resources)(struct dc *dc, struct dc_state *context);
 	void (*optimize_shared_resources)(struct dc *dc);
+	void (*pplib_apply_display_requirements)(
+			struct dc *dc,
+			struct dc_state *context);
 	void (*edp_power_control)(
 			struct dc_link *link,
 			bool enable);
 	void (*edp_backlight_control)(
 			struct dc_link *link,
 			bool enable);
+
 };
 
 void color_space_to_black_color(
-- 
2.14.1