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| author | Alex Deucher <alexander.deucher@amd.com> | 2017-07-05 22:26:48 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-07-14 18:06:18 +0300 |
| commit | 21f6bcb6d449d24b63dd1d5d030d34d88baa6a0f (patch) | |
| tree | c68c13b906cfe8628405f4480b6c38e5b369915a /drivers/gpu | |
| parent | 6c8855541492b3d812d55c9fe5a2ed17ddf022b8 (diff) | |
| download | linux-21f6bcb6d449d24b63dd1d5d030d34d88baa6a0f.tar.xz | |
drm/amdgpu/atomfirmware: implement vram_width for APUs
Implement support using the new atomfirmware system info table.
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | 33 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h | 1 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c index 9ddfe34d12af..a7d65f033883 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c @@ -95,3 +95,36 @@ int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev) ctx->scratch_size_bytes = usage_bytes; return 0; } + +union igp_info { + struct atom_integrated_system_info_v1_11 v11; +}; + +/* + * 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 = get_index_into_master_table(atom_master_list_of_data_tables_v2_1, + integratedsysteminfo); + u16 data_offset, size; + union igp_info *igp_info; + u8 frev, crev; + + /* 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; + } + } + + return 0; +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h index 907e48f6b301..cedafbb9183e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h @@ -27,5 +27,6 @@ bool amdgpu_atomfirmware_gpu_supports_virtualization(struct amdgpu_device *adev); void amdgpu_atomfirmware_scratch_regs_init(struct amdgpu_device *adev); int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev); +int amdgpu_atomfirmware_get_vram_width(struct amdgpu_device *adev); #endif |