diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2026-01-16 17:33:05 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-01-28 16:34:24 -0500 |
| commit | e7fbff9e7622a00c2b53cb14df481916f0019742 (patch) | |
| tree | 3cd5be355ed6fbb0e155221eb30e728d17d7f5f1 | |
| parent | acecfee88564d8d6c11bc23c9b7fff89cd010314 (diff) | |
drm/amdgpu/soc21: fix xclk for APUs
The reference clock is supposed to be 100Mhz, but it
appears to actually be slightly lower (99.81Mhz).
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/14451
Reviewed-by: Jesse Zhang <Jesse.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 637fee3954d4bd509ea9d95ad1780fc174489860)
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/soc21.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c b/drivers/gpu/drm/amd/amdgpu/soc21.c index ad36c96478a8..25536d89635d 100644 --- a/drivers/gpu/drm/amd/amdgpu/soc21.c +++ b/drivers/gpu/drm/amd/amdgpu/soc21.c @@ -225,7 +225,13 @@ static u32 soc21_get_config_memsize(struct amdgpu_device *adev) static u32 soc21_get_xclk(struct amdgpu_device *adev) { - return adev->clock.spll.reference_freq; + u32 reference_clock = adev->clock.spll.reference_freq; + + /* reference clock is actually 99.81 Mhz rather than 100 Mhz */ + if ((adev->flags & AMD_IS_APU) && reference_clock == 10000) + return 9981; + + return reference_clock; } |