diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2026-01-16 17:33:05 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-06 16:48:26 +0100 |
| commit | cbf4d79e5c619450eec11f5b85e49758342fdea6 (patch) | |
| tree | eba54e05200565a74470d0b6bb89e3465ac07562 /drivers/gpu | |
| parent | 9a15d3fdc22d48f597792aee0cf1bf0947fc62e6 (diff) | |
drm/amdgpu/soc21: fix xclk for APUs
commit e7fbff9e7622a00c2b53cb14df481916f0019742 upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu')
| -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 7819f5d584f5..115fdb6a25fa 100644 --- a/drivers/gpu/drm/amd/amdgpu/soc21.c +++ b/drivers/gpu/drm/amd/amdgpu/soc21.c @@ -218,7 +218,13 @@ 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; } |