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drm/amdgpu: add atomfirmware helper function to query ecc status 

ecc default status (enabled or disabled) could be get from umc_config field in umc_info table

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hawking Zhang 2019-03-07 10:14:13 +08:00 committed by Alex Deucher
parent ed606ca3d3
commit 511c4348cf
2 changed files with 32 additions and 0 deletions
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31
drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
View File

@ -236,6 +236,37 @@ int amdgpu_atomfirmware_get_vram_type(struct amdgpu_device *adev)
return 0;
}
/*
* Return true if vbios enabled ecc by default, if umc info table is available
* or false if ecc is not enabled or umc info table is not available
*/
bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev)
{
struct amdgpu_mode_info *mode_info = &adev->mode_info;
int index;
u16 data_offset, size;
union umc_info *umc_info;
u8 frev, crev;
bool ecc_default_enabled = false;
index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
umc_info);
if (amdgpu_atom_parse_data_header(mode_info->atom_context,
index, &size, &frev, &crev, &data_offset)) {
/* support umc_info 3.1+ */
if ((frev == 3 && crev >= 1) || (frev > 3)) {
umc_info = (union umc_info *)
(mode_info->atom_context->bios + data_offset);
ecc_default_enabled =
(le32_to_cpu(umc_info->v31.umc_config) &
UMC_CONFIG__DEFAULT_MEM_ECC_ENABLE) ? true : false;
}
}
return ecc_default_enabled;
}
union firmware_info {
struct atom_firmware_info_v3_1 v31;
};

1
drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
View File

@ -33,5 +33,6 @@ int amdgpu_atomfirmware_get_vram_width(struct amdgpu_device *adev);
int amdgpu_atomfirmware_get_vram_type(struct amdgpu_device *adev);
int amdgpu_atomfirmware_get_clock_info(struct amdgpu_device *adev);
int amdgpu_atomfirmware_get_gfx_info(struct amdgpu_device *adev);
bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev);
#endif