drm/amdgpu/psp11: TA firmware is optional (v3)

Don't warn or fail if it's missing.

v2: handle xgmi case more gracefully.
v3: handle older kernels properly
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Tested-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -90,8 +90,10 @@ static int psp_sw_fini(void *handle)
 	adev->psp.sos_fw = NULL;
 	release_firmware(adev->psp.asd_fw);
 	adev->psp.asd_fw = NULL;
+	if (adev->psp.ta_fw) {
 		release_firmware(adev->psp.ta_fw);
 		adev->psp.ta_fw = NULL;
+	}
 	return 0;
 }
 
@@ -435,6 +437,9 @@ static int psp_xgmi_initialize(struct psp_context *psp)
 	struct ta_xgmi_shared_memory *xgmi_cmd;
 	int ret;
 
+	if (!psp->adev->psp.ta_fw)
+		return -ENOENT;
+
 	if (!psp->xgmi_context.initialized) {
 		ret = psp_xgmi_init_shared_buf(psp);
 		if (ret)

drivers/gpu/drm/amd/amdgpu/psp_v11_0.c

@@ -152,9 +152,12 @@ static int psp_v11_0_init_microcode(struct psp_context *psp)
 
 	snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_ta.bin", chip_name);
 	err = request_firmware(&adev->psp.ta_fw, fw_name, adev->dev);
-	if (err)
-		goto out2;
-
+	if (err) {
+		release_firmware(adev->psp.ta_fw);
+		adev->psp.ta_fw = NULL;
+		dev_info(adev->dev,
+			 "psp v11.0: Failed to load firmware \"%s\"\n", fw_name);
+	} else {
 		err = amdgpu_ucode_validate(adev->psp.ta_fw);
 		if (err)
 			goto out2;
@@ -164,6 +167,7 @@ static int psp_v11_0_init_microcode(struct psp_context *psp)
 		adev->psp.ta_xgmi_ucode_size = le32_to_cpu(ta_hdr->ta_xgmi_size_bytes);
 		adev->psp.ta_xgmi_start_addr = (uint8_t *)ta_hdr +
 			le32_to_cpu(ta_hdr->header.ucode_array_offset_bytes);
+	}
 
 	return 0;