drm/amd/display: Adding a dc_debug option and dmub setting to use PHY FSM for PSR

[Why]
PSR Power on/off is done in PSR. Add a dc_debug option
and dmub setting to use PHY implementation of this instead.

[How]
Add a dc_debug option and dmub setting to use
PHY FSM Power up/down for PSR.
Co-authored-by: Shah Dharati <dharati.shah@amd.com>
Reviewed-by: Hansen Dsouza <hansen.dsouza@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Shah Dharati <dharati.shah@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -710,6 +710,7 @@ struct dc_debug_options {
 #endif
 	bool apply_vendor_specific_lttpr_wa;
 	bool ignore_dpref_ss;
+	uint8_t psr_power_use_phy_fsm;
 };
 
 struct gpu_info_soc_bounding_box_v1_0;

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

@@ -320,6 +320,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
 		copy_settings_data->otg_inst			= 0;
 
 	// Misc
+	copy_settings_data->use_phy_fsm             = link->ctx->dc->debug.psr_power_use_phy_fsm;
 	copy_settings_data->psr_level				= psr_context->psr_level.u32all;
 	copy_settings_data->smu_optimizations_en		= psr_context->allow_smu_optimizations;
 	copy_settings_data->multi_disp_optimizations_en	= psr_context->allow_multi_disp_optimizations;

drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c

@@ -1035,6 +1035,7 @@ static const struct dc_debug_options debug_defaults_drv = {
 	},
 	.optimize_edp_link_rate = true,
 	.enable_sw_cntl_psr = true,
+	.psr_power_use_phy_fsm = 0,
 };
 
 static const struct dc_debug_options debug_defaults_diags = {

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

@@ -1560,10 +1560,14 @@ struct dmub_cmd_psr_copy_settings_data {
 	 * DSC enable status in driver
 	 */
 	uint8_t dsc_enable_status;
+	/*
+	 * Use FSM state for PSR power up/down
+	 */
+	uint8_t use_phy_fsm;
 	/**
-	 * Explicit padding to 3 byte boundary.
+	 * Explicit padding to 2 byte boundary.
 	 */
-	uint8_t pad3[3];
+	uint8_t pad3[2];
 };
 
 /**