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

A number of parade TCONs are causing system hangs when utilized with
older DMUB firmware and PSR-SU. Some changes have been introduced into
DMUB firmware to add resilience against these failures.

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

Cc: stable@vger.kernel.org
Cc: Sean Wang <sean.ns.wang@amd.com>
Cc: Marc Rossi <Marc.Rossi@amd.com>
Cc: Hamza Mahfooz <Hamza.Mahfooz@amd.com>
Cc: Tsung-hua (Ryan) Lin <Tsung-hua.Lin@amd.com>
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2443Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -24,6 +24,7 @@
  */
 
 #include "amdgpu_dm_psr.h"
+#include "dc_dmub_srv.h"
 #include "dc.h"
 #include "dm_helpers.h"
 #include "amdgpu_dm.h"
@@ -50,7 +51,7 @@ static bool link_supports_psrsu(struct dc_link *link)
 	    !link->dpcd_caps.psr_info.psr2_su_y_granularity_cap)
 		return false;
 
-	return true;
+	return dc_dmub_check_min_version(dc->ctx->dmub_srv->dmub);
 }
 
 /*

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

@@ -1011,3 +1011,10 @@ void dc_send_update_cursor_info_to_dmu(
 		dm_execute_dmub_cmd_list(pCtx->stream->ctx, 2, cmd, DM_DMUB_WAIT_TYPE_WAIT);
 	}
 }
+
+bool dc_dmub_check_min_version(struct dmub_srv *srv)
+{
+	if (!srv->hw_funcs.is_psrsu_supported)
+		return true;
+	return srv->hw_funcs.is_psrsu_supported(srv);
+}

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

@@ -86,4 +86,5 @@ void dc_dmub_setup_subvp_dmub_command(struct dc *dc, struct dc_state *context, b
 void dc_dmub_srv_log_diagnostic_data(struct dc_dmub_srv *dc_dmub_srv);
 
 void dc_send_update_cursor_info_to_dmu(struct pipe_ctx *pCtx, uint8_t pipe_idx);
+bool dc_dmub_check_min_version(struct dmub_srv *srv);
 #endif /* _DMUB_DC_SRV_H_ */

drivers/gpu/drm/amd/display/dmub/dmub_srv.h

@@ -367,6 +367,8 @@ struct dmub_srv_hw_funcs {
 
 	bool (*is_supported)(struct dmub_srv *dmub);
 
+	bool (*is_psrsu_supported)(struct dmub_srv *dmub);
+
 	bool (*is_hw_init)(struct dmub_srv *dmub);
 
 	void (*enable_dmub_boot_options)(struct dmub_srv *dmub,

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c

@@ -302,6 +302,11 @@ bool dmub_dcn31_is_supported(struct dmub_srv *dmub)
 	return supported;
 }
 
+bool dmub_dcn31_is_psrsu_supported(struct dmub_srv *dmub)
+{
+	return dmub->fw_version >= DMUB_FW_VERSION(4, 0, 59);
+}
+
 void dmub_dcn31_set_gpint(struct dmub_srv *dmub,
 			  union dmub_gpint_data_register reg)
 {

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.h

@@ -221,6 +221,8 @@ bool dmub_dcn31_is_hw_init(struct dmub_srv *dmub);
 
 bool dmub_dcn31_is_supported(struct dmub_srv *dmub);
 
+bool dmub_dcn31_is_psrsu_supported(struct dmub_srv *dmub);
+
 void dmub_dcn31_set_gpint(struct dmub_srv *dmub,
 			  union dmub_gpint_data_register reg);
 

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

@@ -226,14 +226,16 @@ static bool dmub_srv_hw_setup(struct dmub_srv *dmub, enum dmub_asic asic)
 	case DMUB_ASIC_DCN314:
 	case DMUB_ASIC_DCN315:
 	case DMUB_ASIC_DCN316:
-		if (asic == DMUB_ASIC_DCN314)
+		if (asic == DMUB_ASIC_DCN314) {
 			dmub->regs_dcn31 = &dmub_srv_dcn314_regs;
-		else if (asic == DMUB_ASIC_DCN315)
+		} else if (asic == DMUB_ASIC_DCN315) {
 			dmub->regs_dcn31 = &dmub_srv_dcn315_regs;
-		else if (asic == DMUB_ASIC_DCN316)
+		} else if (asic == DMUB_ASIC_DCN316) {
 			dmub->regs_dcn31 = &dmub_srv_dcn316_regs;
-		else
+		} else {
 			dmub->regs_dcn31 = &dmub_srv_dcn31_regs;
+			funcs->is_psrsu_supported = dmub_dcn31_is_psrsu_supported;
+		}
 		funcs->reset = dmub_dcn31_reset;
 		funcs->reset_release = dmub_dcn31_reset_release;
 		funcs->backdoor_load = dmub_dcn31_backdoor_load;