drm/amdgpu/gfx9: disable gfxoff when reading rlc clock

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>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index b33a4eb..6d6aca0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3959,6 +3959,7 @@ static uint64_t gfx_v9_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);
        if (adev->asic_type == CHIP_VEGA10 && amdgpu_sriov_runtime(adev)) {
                uint32_t tmp, lsb, msb, i = 0;
@@ -3977,6 +3978,7 @@ static uint64_t gfx_v9_0_get_gpu_clock_counter(struct amdgpu_device *adev)
                        ((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;
 }