drm/amd/display: Set minimum requirement for using PSR-SU on Phoenix

The same parade TCON issue can potentially happen on Phoenix, and the same
PSR resilience changes have been ported into the DMUB firmware.

Don't allow running PSR-SU unless on the newer firmware.

Cc: [email protected]
Cc: Sean Wang <[email protected]>
Cc: Marc Rossi <[email protected]>
Cc: Hamza Mahfooz <[email protected]>
Cc: Tsung-hua (Ryan) Lin <[email protected]>
Signed-off-by: Mario Limonciello <[email protected]>
Reviewed-by: Leo Li <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: superm1

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn314.c

@@ -60,3 +60,8 @@ const struct dmub_srv_dcn31_regs dmub_srv_dcn314_regs = {
 	{ DMUB_DCN31_FIELDS() },
 #undef DMUB_SF
 };
+
+bool dmub_dcn314_is_psrsu_supported(struct dmub_srv *dmub)
+{
+	return dmub->fw_version >= DMUB_FW_VERSION(8, 0, 16);
+}

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn314.h

@@ -30,4 +30,6 @@
 
 extern const struct dmub_srv_dcn31_regs dmub_srv_dcn314_regs;
 
+bool dmub_dcn314_is_psrsu_supported(struct dmub_srv *dmub);
+
 #endif /* _DMUB_DCN314_H_ */

drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

@@ -228,6 +228,7 @@ static bool dmub_srv_hw_setup(struct dmub_srv *dmub, enum dmub_asic asic)
 	case DMUB_ASIC_DCN316:
 		if (asic == DMUB_ASIC_DCN314) {
 			dmub->regs_dcn31 = &dmub_srv_dcn314_regs;
+			funcs->is_psrsu_supported = dmub_dcn314_is_psrsu_supported;
 		} else if (asic == DMUB_ASIC_DCN315) {
 			dmub->regs_dcn31 = &dmub_srv_dcn315_regs;
 		} else if (asic == DMUB_ASIC_DCN316) {