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drm/amdgpu/gfx10: disable gfxoff when reading rlc clock

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Otherwise we readback all ones.  Fixes rlc counter
readback while gfxoff is active.

Reviewed-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2020-02-12 08:52:32 -05:00
parent e5f134958d
commit 72b4c01d66
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
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@ -3923,11 +3923,13 @@ static uint64_t gfx_v10_0_get_gpu_clock_counter(struct amdgpu_device *adev)
{
uint64_t clock;
amdgpu_gfx_off_ctrl(adev, false);
mutex_lock(&adev->gfx.gpu_clock_mutex);
WREG32_SOC15(GC, 0, mmRLC_CAPTURE_GPU_CLOCK_COUNT, 1);
clock = (uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_LSB) |
((uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_MSB) << 32ULL);
mutex_unlock(&adev->gfx.gpu_clock_mutex);
amdgpu_gfx_off_ctrl(adev, true);
return clock;
}