drm/amdgpu: cache smu fw version info

reduce cmd submission to smu by caching version info
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -196,16 +196,31 @@ int smu_get_smc_version(struct smu_context *smu, uint32_t *if_version, uint32_t
 	if (!if_version && !smu_version)
 		return -EINVAL;
 
+	if (smu->smc_fw_if_version && smu->smc_fw_version)
+	{
+		if (if_version)
+			*if_version = smu->smc_fw_if_version;
+
+		if (smu_version)
+			*smu_version = smu->smc_fw_version;
+
+		return 0;
+	}
+
 	if (if_version) {
 		ret = smu_send_smc_msg(smu, SMU_MSG_GetDriverIfVersion, if_version);
 		if (ret)
 			return ret;
+
+		smu->smc_fw_if_version = *if_version;
 	}
 
 	if (smu_version) {
 		ret = smu_send_smc_msg(smu, SMU_MSG_GetSmuVersion, smu_version);
 		if (ret)
 			return ret;
+
+		smu->smc_fw_version = *smu_version;
 	}
 
 	return ret;

drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h

@@ -405,7 +405,9 @@ struct smu_context
 	bool pm_enabled;
 	bool is_apu;
 
-	uint32_t smc_if_version;
+	uint32_t smc_driver_if_version;
+	uint32_t smc_fw_if_version;
+	uint32_t smc_fw_version;
 
 	bool uploading_custom_pp_table;
 	bool dc_controlled_by_gpio;

drivers/gpu/drm/amd/powerplay/renoir_ppt.c

@@ -950,6 +950,6 @@ static const struct pptable_funcs renoir_ppt_funcs = {
 void renoir_set_ppt_funcs(struct smu_context *smu)
 {
 	smu->ppt_funcs = &renoir_ppt_funcs;
-	smu->smc_if_version = SMU12_DRIVER_IF_VERSION;
+	smu->smc_driver_if_version = SMU12_DRIVER_IF_VERSION;
 	smu->is_apu = true;
 }

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -266,23 +266,23 @@ int smu_v11_0_check_fw_version(struct smu_context *smu)
 
 	switch (smu->adev->asic_type) {
 	case CHIP_VEGA20:
-		smu->smc_if_version = SMU11_DRIVER_IF_VERSION_VG20;
+		smu->smc_driver_if_version = SMU11_DRIVER_IF_VERSION_VG20;
 		break;
 	case CHIP_ARCTURUS:
-		smu->smc_if_version = SMU11_DRIVER_IF_VERSION_ARCT;
+		smu->smc_driver_if_version = SMU11_DRIVER_IF_VERSION_ARCT;
 		break;
 	case CHIP_NAVI10:
-		smu->smc_if_version = SMU11_DRIVER_IF_VERSION_NV10;
+		smu->smc_driver_if_version = SMU11_DRIVER_IF_VERSION_NV10;
 		break;
 	case CHIP_NAVI12:
-		smu->smc_if_version = SMU11_DRIVER_IF_VERSION_NV12;
+		smu->smc_driver_if_version = SMU11_DRIVER_IF_VERSION_NV12;
 		break;
 	case CHIP_NAVI14:
-		smu->smc_if_version = SMU11_DRIVER_IF_VERSION_NV14;
+		smu->smc_driver_if_version = SMU11_DRIVER_IF_VERSION_NV14;
 		break;
 	default:
 		pr_err("smu unsupported asic type:%d.\n", smu->adev->asic_type);
-		smu->smc_if_version = SMU11_DRIVER_IF_VERSION_INV;
+		smu->smc_driver_if_version = SMU11_DRIVER_IF_VERSION_INV;
 		break;
 	}
 
@@ -294,10 +294,10 @@ int smu_v11_0_check_fw_version(struct smu_context *smu)
 	 * Considering above, we just leave user a warning message instead
 	 * of halt driver loading.
 	 */
-	if (if_version != smu->smc_if_version) {
+	if (if_version != smu->smc_driver_if_version) {
 		pr_info("smu driver if version = 0x%08x, smu fw if version = 0x%08x, "
 			"smu fw version = 0x%08x (%d.%d.%d)\n",
-			smu->smc_if_version, if_version,
+			smu->smc_driver_if_version, if_version,
 			smu_version, smu_major, smu_minor, smu_debug);
 		pr_warn("SMU driver if version not matched\n");
 	}

drivers/gpu/drm/amd/powerplay/smu_v12_0.c

@@ -160,10 +160,10 @@ int smu_v12_0_check_fw_version(struct smu_context *smu)
 	 * Considering above, we just leave user a warning message instead
 	 * of halt driver loading.
 	 */
-	if (if_version != smu->smc_if_version) {
+	if (if_version != smu->smc_driver_if_version) {
 		pr_info("smu driver if version = 0x%08x, smu fw if version = 0x%08x, "
 			"smu fw version = 0x%08x (%d.%d.%d)\n",
-			smu->smc_if_version, if_version,
+			smu->smc_driver_if_version, if_version,
 			smu_version, smu_major, smu_minor, smu_debug);
 		pr_warn("SMU driver if version not matched\n");
 	}