[PATCH 2/2] drm/amdgpu/gfx10: disable gfxoff when reading rlc clock
Yuan, Xiaojie
Xiaojie.Yuan at amd.com
Wed Feb 12 15:32:23 UTC 2020
Series is Reviewed-by: Xiaojie Yuan <xiaojie.yuan at amd.com>
BR,
Xiaojie
> On Feb 12, 2020, at 9:53 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>
> Otherwise we readback all ones. Fixes rlc counter
> readback while gfxoff is active.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> index 4e25b39ac14f..0eff2e7d33fa 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> @@ -3924,11 +3924,13 @@ 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;
> }
>
> --
> 2.24.1
>
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