drm/amdgpu/psp_v3_1: Get psp fw version through reading register

If PSP FW is running already, driver will not load PSP FW again and skip
it. So psp fw version is not correct if reading it from FW binary file,
need to get right version from register.
Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/psp_v3_1.c

@@ -240,8 +240,11 @@ static int psp_v3_1_bootloader_load_sos(struct psp_context *psp)
 	 * are already been loaded.
 	 */
 	sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
-	if (sol_reg)
+	if (sol_reg) {
+		psp->sos_fw_version = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_58);
+		printk("sos fw version = 0x%x.\n", psp->sos_fw_version);
 		return 0;
+	}
 
 	/* Wait for bootloader to signify that is ready having bit 31 of C2PMSG_35 set to 1 */
 	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_35),