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| author | Harry Wentland <harry.wentland@amd.com> | 2017-03-31 20:14:33 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-04-04 14:42:40 -0400 |
| commit | 1ce65f5284d6018916dd4a86865d0ce5f11d24b9 (patch) | |
| tree | 3338f081ba0e265f3710023945802bf7e11662e0 /drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h | |
| parent | 83ca145d155fbd50b9f23b0de99cd16e805a75d0 (diff) | |
| download | linux-stable-1ce65f5284d6018916dd4a86865d0ce5f11d24b9.tar.gz linux-stable-1ce65f5284d6018916dd4a86865d0ce5f11d24b9.tar.bz2 linux-stable-1ce65f5284d6018916dd4a86865d0ce5f11d24b9.zip | |
drm/amdgpu: Read vram width from integrated system info table
On KB, KV, CZ we should read the vram width from integrated system
table, if we can. The NOOFCHAN in MC_SHARED_CHMAP is not accurate.
With this change we can enable two 4k displays on CZ again. This use
case was broken sometime in January when we started looking at
vram_width for bandwidth calculations instead of hardcoding this value.
v2:
Return 0 if integrated system info table is not available.
Tested-by: Roman Li <roman.li@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h index 4e0f488487f3..38d0fe32e5cd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h @@ -148,6 +148,8 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev); int amdgpu_atombios_get_gfx_info(struct amdgpu_device *adev); +int amdgpu_atombios_get_vram_width(struct amdgpu_device *adev); + bool amdgpu_atombios_get_asic_ss_info(struct amdgpu_device *adev, struct amdgpu_atom_ss *ss, int id, u32 clock); |