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drm/amdgpu: Set reference clock to 100Mhz on Renoir (v2)

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commit 6e80fb8ab04f6c4f377e2fd422bdd1855beb7371 upstream.

Fixes the rlc reference clock used for GPU timestamps.
Value is 100Mhz.  Confirmed with hardware team.

v2: reword commit message.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1480
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2021-02-16 10:57:00 -05:00 • committed by Greg Kroah-Hartman
commit 7c1a2f9190
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/soc15.c
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@ -276,6 +276,8 @@ static u32 soc15_get_xclk(struct amdgpu_device *adev)
{
u32 reference_clock = adev->clock.spll.reference_freq;
if (adev->asic_type == CHIP_RENOIR)
return 10000;
if (adev->asic_type == CHIP_RAVEN)
return reference_clock / 4;