-/*
- * Return vram width from integrated system info table, if available,
- * or 0 if not.
- */
-int amdgpu_atomfirmware_get_vram_width(struct amdgpu_device *adev)
-{
- struct amdgpu_mode_info *mode_info = &adev->mode_info;
- int index;
- u16 data_offset, size;
- union igp_info *igp_info;
- union vram_info *vram_info;
- u32 mem_channel_number;
- u32 mem_channel_width;
- u8 frev, crev;
-
- if (adev->flags & AMD_IS_APU)
- index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
- integratedsysteminfo);
- else
- index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
- vram_info);
-
- /* get any igp specific overrides */
- if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, &size,
- &frev, &crev, &data_offset)) {
- if (adev->flags & AMD_IS_APU) {
- igp_info = (union igp_info *)
- (mode_info->atom_context->bios + data_offset);
- switch (crev) {
- case 11:
- mem_channel_number = igp_info->v11.umachannelnumber;
- /* channel width is 64 */
- return mem_channel_number * 64;
- default:
- return 0;
- }
- } else {
- vram_info = (union vram_info *)
- (mode_info->atom_context->bios + data_offset);
- switch (crev) {
- case 3:
- mem_channel_number = vram_info->v23.vram_module[0].channel_num;
- mem_channel_width = vram_info->v23.vram_module[0].channel_width;
- return mem_channel_number * (1 << mem_channel_width);
- case 4:
- mem_channel_number = vram_info->v24.vram_module[0].channel_num;
- mem_channel_width = vram_info->v24.vram_module[0].channel_width;
- return mem_channel_number * (1 << mem_channel_width);
- default:
- return 0;
- }
- }
- }