drm/amd/display: Power down hardware if set mode is not called before timeout

[WHY]
In headless systems, if set mode is not called, hardware will not be
powered down on boot, causing HW/SW discrepancies.  Powering down
hardware on boot will ensure SW state is accurate.

[HOW]
Set a timer callback on boot for 10 seconds. If set mode is not called
within that time, power down hardware. Otherwise, do not power down.

Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

8 files changed, 52 insertions, 32 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 4f97329d9daf..a9a5ef250a9e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2683,6 +2683,13 @@ void dc_interrupt_ack(struct dc *dc, enum dc_irq_source src)
 	dal_irq_service_ack(dc->res_pool->irqs, src);
 }
 
+void dc_power_down_on_boot(struct dc *dc)
+{
+	if (dc->ctx->dce_environment != DCE_ENV_VIRTUAL_HW &&
+			dc->hwss.power_down_on_boot)
+		dc->hwss.power_down_on_boot(dc);
+}
+
 void dc_set_power_state(
 	struct dc *dc,
 	enum dc_acpi_cm_power_state power_state)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 389edcf3f6ce..c2336ca3a9e0 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1029,6 +1029,7 @@ bool dc_resource_is_dsc_encoding_supported(const struct dc *dc);
  */
 bool dc_commit_state(struct dc *dc, struct dc_state *context);
 
+void dc_power_down_on_boot(struct dc *dc);
 
 struct dc_state *dc_create_state(struct dc *dc);
 struct dc_state *dc_copy_state(struct dc_state *src_ctx);
@@ -1229,6 +1230,8 @@ void dc_set_power_state(
 		enum dc_acpi_cm_power_state power_state);
 void dc_resume(struct dc *dc);
 
+void dc_power_down_on_boot(struct dc *dc);
+
 #if defined(CONFIG_DRM_AMD_DC_HDCP)
 /*
  * HDCP Interfaces
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 4a70e286b4fa..9cdc3d2919f4 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
@@ -1390,38 +1390,6 @@ void dcn10_init_hw(struct dc *dc)
 		}
 	}
 
-	/* In headless boot cases, DIG may be turned
-	 * on which causes HW/SW discrepancies.
-	 * To avoid this, power down hardware on boot
-	 * if DIG is turned on and seamless boot not enabled
-	 */
-	if (dc->config.power_down_display_on_boot) {
-		struct dc_link *edp_link = get_edp_link(dc);
-
-		if (edp_link &&
-				edp_link->link_enc->funcs->is_dig_enabled &&
-				edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
-				dc->hwseq->funcs.edp_backlight_control &&
-				dc->hwss.power_down &&
-				dc->hwss.edp_power_control) {
-			dc->hwseq->funcs.edp_backlight_control(edp_link, false);
-			dc->hwss.power_down(dc);
-			dc->hwss.edp_power_control(edp_link, false);
-		} else {
-			for (i = 0; i < dc->link_count; i++) {
-				struct dc_link *link = dc->links[i];
-
-				if (link->link_enc->funcs->is_dig_enabled &&
-						link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
-						dc->hwss.power_down) {
-					dc->hwss.power_down(dc);
-					break;
-				}
-
-			}
-		}
-	}
-
 	if (!is_optimized_init_done) {
 
 		for (i = 0; i < res_pool->audio_count; i++) {
@@ -1472,6 +1440,43 @@ void dcn10_init_hw(struct dc *dc)
 
 }
 
+/* In headless boot cases, DIG may be turned
+ * on which causes HW/SW discrepancies.
+ * To avoid this, power down hardware on boot
+ * if DIG is turned on and seamless boot not enabled
+ */
+void dcn10_power_down_on_boot(struct dc *dc)
+{
+	int i = 0;
+
+	if (dc->config.power_down_display_on_boot) {
+		struct dc_link *edp_link = get_edp_link(dc);
+
+		if (edp_link &&
+				edp_link->link_enc->funcs->is_dig_enabled &&
+				edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
+				dc->hwseq->funcs.edp_backlight_control &&
+				dc->hwss.power_down &&
+				dc->hwss.edp_power_control) {
+			dc->hwseq->funcs.edp_backlight_control(edp_link, false);
+			dc->hwss.power_down(dc);
+			dc->hwss.edp_power_control(edp_link, false);
+		} else {
+			for (i = 0; i < dc->link_count; i++) {
+				struct dc_link *link = dc->links[i];
+
+				if (link->link_enc->funcs->is_dig_enabled &&
+						link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
+						dc->hwss.power_down) {
+					dc->hwss.power_down(dc);
+					break;
+				}
+
+			}
+		}
+	}
+}
+
 void dcn10_reset_hw_ctx_wrap(
 		struct dc *dc,
 		struct dc_state *context)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h
index 42b6e016d71e..6d891166da8a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h
@@ -109,6 +109,7 @@ void dcn10_program_pipe(
 void dcn10_program_gamut_remap(struct pipe_ctx *pipe_ctx);
 void dcn10_init_hw(struct dc *dc);
 void dcn10_init_pipes(struct dc *dc, struct dc_state *context);
+void dcn10_power_down_on_boot(struct dc *dc);
 enum dc_status dce110_apply_ctx_to_hw(
 		struct dc *dc,
 		struct dc_state *context);
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c
index f6a790c49321..5c98b71c1d47 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c
@@ -30,6 +30,7 @@
 static const struct hw_sequencer_funcs dcn10_funcs = {
 	.program_gamut_remap = dcn10_program_gamut_remap,
 	.init_hw = dcn10_init_hw,
+	.power_down_on_boot = dcn10_power_down_on_boot,
 	.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
 	.apply_ctx_for_surface = dcn10_apply_ctx_for_surface,
 	.post_unlock_program_front_end = dcn10_post_unlock_program_front_end,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c
index bb9e9bec2f28..2380392b916e 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c
@@ -30,6 +30,7 @@
 static const struct hw_sequencer_funcs dcn20_funcs = {
 	.program_gamut_remap = dcn10_program_gamut_remap,
 	.init_hw = dcn10_init_hw,
+	.power_down_on_boot =  dcn10_power_down_on_boot,
 	.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
 	.apply_ctx_for_surface = NULL,
 	.program_front_end_for_ctx = dcn20_program_front_end_for_ctx,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c
index 8575de1a8ad2..177d0dc8927a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c
@@ -31,6 +31,7 @@
 static const struct hw_sequencer_funcs dcn21_funcs = {
 	.program_gamut_remap = dcn10_program_gamut_remap,
 	.init_hw = dcn10_init_hw,
+	.power_down_on_boot = dcn10_power_down_on_boot,
 	.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
 	.apply_ctx_for_surface = NULL,
 	.program_front_end_for_ctx = dcn20_program_front_end_for_ctx,
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 066a2a723c12..720ce5e458d8 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
@@ -56,6 +56,7 @@ struct hw_sequencer_funcs {
 
 	/* Pipe Programming Related */
 	void (*init_hw)(struct dc *dc);
+	void (*power_down_on_boot)(struct dc *dc);
 	void (*enable_accelerated_mode)(struct dc *dc,
 			struct dc_state *context);
 	enum dc_status (*apply_ctx_to_hw)(struct dc *dc,