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drm/amdgpu: query vram_width from vram_info table 

Driver will get channel_number and channel_width from
vram_info table, then calculate vram_width by multiply
channel_number by channel_width

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jack Xiao <Jack.Xiao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hawking Zhang 2018-12-11 07:12:16 +08:00 committed by Alex Deucher
parent 89d7a79c7b
commit 09fa0613bd
1 changed files with 37 additions and 9 deletions
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46
drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
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@ -127,22 +127,50 @@ union vram_info {
int amdgpu_atomfirmware_get_vram_width(struct amdgpu_device *adev)
{
struct amdgpu_mode_info *mode_info = &adev->mode_info;
int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
integratedsysteminfo);
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)) {
igp_info = (union igp_info *)
(mode_info->atom_context->bios + data_offset);
switch (crev) {
case 11:
return igp_info->v11.umachannelnumber * 64;
default:
return 0;
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;
}
}
}