diff options
| author | Aaron Liu <aaron.liu@amd.com> | 2021-05-17 12:45:35 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-05-20 05:44:48 +0300 |
| commit | 9a530062d57fe4268eb5b561b1a46e826480f324 (patch) | |
| tree | 60d666d4b3c60da080506d18ba59bb6d8711fb34 | |
| parent | 87476d12c5cecde5c6d37010cfc12d4896c44cb3 (diff) | |
| download | linux-9a530062d57fe4268eb5b561b1a46e826480f324.tar.xz | |
drm/amdgpu: modify system reference clock source for navi+ (V2)
Starting from Navi+, the rlc reference clock is used for system clock
from vbios gfx_info table. It is incorrect to use core_refclk_10khz of
vbios smu_info table as system clock.
Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c index 8c417014ca89..3b5d13189073 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c @@ -546,6 +546,21 @@ int amdgpu_atomfirmware_get_clock_info(struct amdgpu_device *adev) ret = 0; } + /* if asic is Navi+, the rlc reference clock is used for system clock + * from vbios gfx_info table */ + if (adev->asic_type >= CHIP_NAVI10) { + index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1, + gfx_info); + if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL, + &frev, &crev, &data_offset)) { + struct atom_gfx_info_v2_2 *gfx_info = (struct atom_gfx_info_v2_2*) + (mode_info->atom_context->bios + data_offset); + if ((frev == 2) && (crev >= 2)) + spll->reference_freq = le32_to_cpu(gfx_info->rlc_gpu_timer_refclk); + ret = 0; + } + } + return ret; } |