drm/amd/pp: Delete is_smc_ram_running function on RV

1. There is a race condition when another ip also use same register pairs
2. check once at boot up by GetDriverIfVersion message is sufficient
   to check SMU health. so delete is_smc_ram_running check.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/rv_smumgr.c

@@ -47,34 +47,10 @@
 #define smnMP1_FIRMWARE_FLAGS       0x3010028
 
 
-bool rv_is_smc_ram_running(struct pp_hwmgr *hwmgr)
-{
-	uint32_t mp1_fw_flags, reg;
-
-	reg = soc15_get_register_offset(NBIF_HWID, 0,
-			mmPCIE_INDEX2_BASE_IDX, mmPCIE_INDEX2);
-
-	cgs_write_register(hwmgr->device, reg,
-			(MP1_Public | (smnMP1_FIRMWARE_FLAGS & 0xffffffff)));
-
-	reg = soc15_get_register_offset(NBIF_HWID, 0,
-			mmPCIE_DATA2_BASE_IDX, mmPCIE_DATA2);
-
-	mp1_fw_flags = cgs_read_register(hwmgr->device, reg);
-
-	if (mp1_fw_flags & MP1_FIRMWARE_FLAGS__INTERRUPTS_ENABLED_MASK)
-		return true;
-
-	return false;
-}
-
 static uint32_t rv_wait_for_response(struct pp_hwmgr *hwmgr)
 {
 	uint32_t reg;
 
-	if (!rv_is_smc_ram_running(hwmgr))
-		return -EINVAL;
-
 	reg = soc15_get_register_offset(MP1_HWID, 0,
 			mmMP1_SMN_C2PMSG_90_BASE_IDX, mmMP1_SMN_C2PMSG_90);
 
@@ -89,9 +65,6 @@ int rv_send_msg_to_smc_without_waiting(struct pp_hwmgr *hwmgr,
 {
 	uint32_t reg;
 
-	if (!rv_is_smc_ram_running(hwmgr))
-		return -EINVAL;
-
 	reg = soc15_get_register_offset(MP1_HWID, 0,
 			mmMP1_SMN_C2PMSG_66_BASE_IDX, mmMP1_SMN_C2PMSG_66);
 	cgs_write_register(hwmgr->device, reg, msg);

drivers/gpu/drm/amd/powerplay/smumgr/rv_smumgr.h

@@ -51,7 +51,6 @@ struct rv_smumgr {
 };
 
 int rv_read_arg_from_smc(struct pp_hwmgr *hwmgr, uint32_t *arg);
-bool rv_is_smc_ram_running(struct pp_hwmgr *hwmgr);
 int rv_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 		uint8_t *table, int16_t table_id);
 int rv_copy_table_to_smc(struct pp_hwmgr *hwmgr,