drm/amd/display: dc_link_set_psr_allow_active refactoring

[Why]
To expose new power optimization flags to PSR interface. It allows the
PSR related power features can be enabled separately base on different
use scenarios.
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Robin Chen <po-tchen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c

@@ -107,6 +107,8 @@ bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
 	 */
 	// Init fail safe of 2 frames static
 	unsigned int num_frames_static = 2;
+	unsigned int power_opt = 0;
+	bool psr_enable = true;
 
 	DRM_DEBUG_DRIVER("Enabling psr...\n");
 
@@ -133,7 +135,9 @@ bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
 					   &stream, 1,
 					   &params);
 
-	return dc_link_set_psr_allow_active(link, true, false, false);
+	power_opt |= psr_power_opt_z10_static_screen;
+
+	return dc_link_set_psr_allow_active(link, &psr_enable, false, false, &power_opt);
 }
 
 /*
@@ -144,10 +148,12 @@ bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
  */
 bool amdgpu_dm_psr_disable(struct dc_stream_state *stream)
 {
+	unsigned int power_opt = 0;
+	bool psr_enable = false;
 
 	DRM_DEBUG_DRIVER("Disabling psr...\n");
 
-	return dc_link_set_psr_allow_active(stream->link, false, true, false);
+	return dc_link_set_psr_allow_active(stream->link, &psr_enable, true, false, &power_opt);
 }
 
 /*

drivers/gpu/drm/amd/display/dc/clk_mgr/clk_mgr.c

@@ -100,11 +100,13 @@ void clk_mgr_exit_optimized_pwr_state(const struct dc *dc, struct clk_mgr *clk_m
 
 	if (edp_num) {
 		for (panel_inst = 0; panel_inst < edp_num; panel_inst++) {
+			bool allow_active = false;
+
 			edp_link = edp_links[panel_inst];
 			if (!edp_link->psr_settings.psr_feature_enabled)
 				continue;
 			clk_mgr->psr_allow_active_cache = edp_link->psr_settings.psr_allow_active;
-			dc_link_set_psr_allow_active(edp_link, false, false, false);
+			dc_link_set_psr_allow_active(edp_link, &allow_active, false, false, NULL);
 		}
 	}
 
@@ -124,7 +126,7 @@ void clk_mgr_optimize_pwr_state(const struct dc *dc, struct clk_mgr *clk_mgr)
 			if (!edp_link->psr_settings.psr_feature_enabled)
 				continue;
 			dc_link_set_psr_allow_active(edp_link,
-					clk_mgr->psr_allow_active_cache, false, false);
+					&clk_mgr->psr_allow_active_cache, false, false, NULL);
 		}
 	}
 

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -3493,6 +3493,7 @@ void dc_get_clock(struct dc *dc, enum dc_clock_type clock_type, struct dc_clock_
 bool dc_set_psr_allow_active(struct dc *dc, bool enable)
 {
 	int i;
+	bool allow_active;
 
 	for (i = 0; i < dc->current_state->stream_count ; i++) {
 		struct dc_link *link;
@@ -3504,10 +3505,12 @@ bool dc_set_psr_allow_active(struct dc *dc, bool enable)
 
 		if (link->psr_settings.psr_feature_enabled) {
 			if (enable && !link->psr_settings.psr_allow_active) {
-				if (!dc_link_set_psr_allow_active(link, true, false, false))
+				allow_active = true;
+				if (!dc_link_set_psr_allow_active(link, &allow_active, false, false, NULL))
 					return false;
 			} else if (!enable && link->psr_settings.psr_allow_active) {
-				if (!dc_link_set_psr_allow_active(link, false, true, false))
+				allow_active = false;
+				if (!dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL))
 					return false;
 			}
 		}

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -2916,8 +2916,8 @@ bool dc_link_set_backlight_level(const struct dc_link *link,
 	return true;
 }
 
-bool dc_link_set_psr_allow_active(struct dc_link *link, bool allow_active,
-		bool wait, bool force_static)
+bool dc_link_set_psr_allow_active(struct dc_link *link, const bool *allow_active,
+		bool wait, bool force_static, const unsigned int *power_opts)
 {
 	struct dc  *dc = link->ctx->dc;
 	struct dmcu *dmcu = dc->res_pool->dmcu;
@@ -2930,20 +2930,33 @@ bool dc_link_set_psr_allow_active(struct dc_link *link, bool allow_active,
 	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
 		return false;
 
-	link->psr_settings.psr_allow_active = allow_active;
+	/* Set power optimization flag */
+	if (power_opts && link->psr_settings.psr_power_opt != *power_opts) {
+		link->psr_settings.psr_power_opt = *power_opts;
+
+		if (psr != NULL && link->psr_settings.psr_feature_enabled && psr->funcs->psr_set_power_opt)
+			psr->funcs->psr_set_power_opt(psr, link->psr_settings.psr_power_opt);
+	}
+
+	/* Enable or Disable PSR */
+	if (allow_active && link->psr_settings.psr_allow_active != *allow_active) {
+		link->psr_settings.psr_allow_active = *allow_active;
+
 #if defined(CONFIG_DRM_AMD_DC_DCN)
-	if (!allow_active)
-		dc_z10_restore(dc);
+		if (!link->psr_settings.psr_allow_active)
+			dc_z10_restore(dc);
 #endif
 
-	if (psr != NULL && link->psr_settings.psr_feature_enabled) {
-		if (force_static && psr->funcs->psr_force_static)
-			psr->funcs->psr_force_static(psr, panel_inst);
-		psr->funcs->psr_enable(psr, allow_active, wait, panel_inst);
-	} else if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) && link->psr_settings.psr_feature_enabled)
-		dmcu->funcs->set_psr_enable(dmcu, allow_active, wait);
-	else
-		return false;
+		if (psr != NULL && link->psr_settings.psr_feature_enabled) {
+			if (force_static && psr->funcs->psr_force_static)
+				psr->funcs->psr_force_static(psr, panel_inst);
+			psr->funcs->psr_enable(psr, link->psr_settings.psr_allow_active, wait, panel_inst);
+		} else if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) &&
+			link->psr_settings.psr_feature_enabled)
+			dmcu->funcs->set_psr_enable(dmcu, link->psr_settings.psr_allow_active, wait);
+		else
+			return false;
+	}
 
 	return true;
 }

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -3523,6 +3523,8 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link)
 		if (psr_error_status.bits.LINK_CRC_ERROR ||
 				psr_error_status.bits.RFB_STORAGE_ERROR ||
 				psr_error_status.bits.VSC_SDP_ERROR) {
+			bool allow_active;
+
 			/* Acknowledge and clear error bits */
 			dm_helpers_dp_write_dpcd(
 				link->ctx,
@@ -3532,8 +3534,10 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link)
 				sizeof(psr_error_status.raw));
 
 			/* PSR error, disable and re-enable PSR */
-			dc_link_set_psr_allow_active(link, false, true, false);
-			dc_link_set_psr_allow_active(link, true, true, false);
+			allow_active = false;
+			dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL);
+			allow_active = true;
+			dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL);
 
 			return true;
 		} else if (psr_sink_psr_status.bits.SINK_SELF_REFRESH_STATUS ==

drivers/gpu/drm/amd/display/dc/dc.h

@@ -342,6 +342,12 @@ enum visual_confirm {
 	VISUAL_CONFIRM_SWIZZLE = 9,
 };
 
+enum dc_psr_power_opts {
+	psr_power_opt_invalid = 0x0,
+	psr_power_opt_smu_opt_static_screen = 0x1,
+	psr_power_opt_z10_static_screen = 0x10,
+};
+
 enum dcc_option {
 	DCC_ENABLE = 0,
 	DCC_DISABLE = 1,

drivers/gpu/drm/amd/display/dc/dc_link.h

@@ -85,6 +85,7 @@ struct psr_settings {
 	 */
 	bool psr_frame_capture_indication_req;
 	unsigned int psr_sdp_transmit_line_num_deadline;
+	unsigned int psr_power_opt;
 };
 
 /*
@@ -267,8 +268,8 @@ int dc_link_get_backlight_level(const struct dc_link *dc_link);
 
 int dc_link_get_target_backlight_pwm(const struct dc_link *link);
 
-bool dc_link_set_psr_allow_active(struct dc_link *dc_link, bool enable,
-		bool wait, bool force_static);
+bool dc_link_set_psr_allow_active(struct dc_link *dc_link, const bool *enable,
+		bool wait, bool force_static, const unsigned int *power_opts);
 
 bool dc_link_get_psr_state(const struct dc_link *dc_link, enum dc_psr_state *state);
 

drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c

@@ -227,6 +227,25 @@ static void dmub_psr_set_level(struct dmub_psr *dmub, uint16_t psr_level, uint8_
 	dc_dmub_srv_wait_idle(dc->dmub_srv);
 }
 
+/**
+ * Set PSR power optimization flags.
+ */
+static void dmub_psr_set_power_opt(struct dmub_psr *dmub, unsigned int power_opt)
+{
+	union dmub_rb_cmd cmd;
+	struct dc_context *dc = dmub->ctx;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.psr_set_power_opt.header.type = DMUB_CMD__PSR;
+	cmd.psr_set_power_opt.header.sub_type = DMUB_CMD__SET_PSR_POWER_OPT;
+	cmd.psr_set_power_opt.header.payload_bytes = sizeof(struct dmub_cmd_psr_set_power_opt_data);
+	cmd.psr_set_power_opt.psr_set_power_opt_data.power_opt = power_opt;
+
+	dc_dmub_srv_cmd_queue(dc->dmub_srv, &cmd);
+	dc_dmub_srv_cmd_execute(dc->dmub_srv);
+	dc_dmub_srv_wait_idle(dc->dmub_srv);
+}
+
 /*
  * Setup PSR by programming phy registers and sending psr hw context values to firmware.
  */
@@ -358,6 +377,7 @@ static const struct dmub_psr_funcs psr_funcs = {
 	.psr_set_level			= dmub_psr_set_level,
 	.psr_force_static		= dmub_psr_force_static,
 	.psr_get_residency		= dmub_psr_get_residency,
+	.psr_set_power_opt		= dmub_psr_set_power_opt,
 };
 
 /*

drivers/gpu/drm/amd/display/dc/dce/dmub_psr.h

@@ -46,6 +46,7 @@ struct dmub_psr_funcs {
 	void (*psr_force_static)(struct dmub_psr *dmub, uint8_t panel_inst);
 	void (*psr_get_residency)(struct dmub_psr *dmub, uint32_t *residency,
 	uint8_t panel_inst);
+	void (*psr_set_power_opt)(struct dmub_psr *dmub, unsigned int power_opt);
 };
 
 struct dmub_psr *dmub_psr_create(struct dc_context *ctx);

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

@@ -1378,6 +1378,10 @@ enum dmub_cmd_psr_type {
 	 * Forces PSR enabled until an explicit PSR disable call.
 	 */
 	DMUB_CMD__PSR_FORCE_STATIC		= 5,
+	/**
+	 * Set PSR power option
+	 */
+	DMUB_CMD__SET_PSR_POWER_OPT = 7,
 };
 
 /**
@@ -1675,6 +1679,44 @@ struct dmub_rb_cmd_psr_force_static {
 	struct dmub_cmd_psr_force_static_data psr_force_static_data;
 };
 
+/**
+ * Data passed from driver to FW in a DMUB_CMD__SET_PSR_POWER_OPT command.
+ */
+struct dmub_cmd_psr_set_power_opt_data {
+	/**
+	 * PSR control version.
+	 */
+	uint8_t cmd_version;
+	/**
+	 * Panel Instance.
+	 * Panel isntance to identify which psr_state to use
+	 * Currently the support is only for 0 or 1
+	 */
+	uint8_t panel_inst;
+	/**
+	 * Explicit padding to 4 byte boundary.
+	 */
+	uint8_t pad[2];
+	/**
+	 * PSR power option
+	 */
+	uint32_t power_opt;
+};
+
+/**
+ * Definition of a DMUB_CMD__SET_PSR_POWER_OPT command.
+ */
+struct dmub_rb_cmd_psr_set_power_opt {
+	/**
+	 * Command header.
+	 */
+	struct dmub_cmd_header header;
+	/**
+	 * Definition of a DMUB_CMD__SET_PSR_POWER_OPT command.
+	 */
+	struct dmub_cmd_psr_set_power_opt_data psr_set_power_opt_data;
+};
+
 /**
  * Set of HW components that can be locked.
  *
@@ -2458,6 +2500,10 @@ union dmub_rb_cmd {
 	 * Definition of a DMUB_CMD__PSR_FORCE_STATIC command.
 	 */
 	struct dmub_rb_cmd_psr_force_static psr_force_static;
+	/**
+	 * Definition of a DMUB_CMD__SET_PSR_POWER_OPT command.
+	 */
+	struct dmub_rb_cmd_psr_set_power_opt psr_set_power_opt;
 	/**
 	 * Definition of a DMUB_CMD__PLAT_54186_WA command.
 	 */