drm/amdgpu/atomfirmware: update vram info handling for renoir

Add support for integrated_system_info table v12.  Use the actual
v12 structure.
Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -111,6 +111,7 @@ int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev)
 
 union igp_info {
 	struct atom_integrated_system_info_v1_11 v11;
+	struct atom_integrated_system_info_v1_12 v12;
 };
 
 union umc_info {
@@ -206,7 +207,6 @@ amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
 				(mode_info->atom_context->bios + data_offset);
 			switch (crev) {
 			case 11:
-			case 12:
 				mem_channel_number = igp_info->v11.umachannelnumber;
 				/* channel width is 64 */
 				if (vram_width)
@@ -215,6 +215,15 @@ amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
 				if (vram_type)
 					*vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
 				break;
+			case 12:
+				mem_channel_number = igp_info->v12.umachannelnumber;
+				/* channel width is 64 */
+				if (vram_width)
+					*vram_width = mem_channel_number * 64;
+				mem_type = igp_info->v12.memorytype;
+				if (vram_type)
+					*vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
+				break;
 			default:
 				return -EINVAL;
 			}