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Message-Id: <20200227132244.804644646@linuxfoundation.org>
Date: Thu, 27 Feb 2020 14:36:58 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Xiaojie Yuan <xiaojie.yuan@....com>,
Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.5 081/150] drm/amdgpu/gfx9: disable gfxoff when reading rlc clock
From: Alex Deucher <alexander.deucher@....com>
commit 120cf959308e1bda984e40a9edd25ee2d6262efd upstream.
Otherwise we readback all ones. Fixes rlc counter
readback while gfxoff is active.
Reviewed-by: Xiaojie Yuan <xiaojie.yuan@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3852,6 +3852,7 @@ static uint64_t gfx_v9_0_get_gpu_clock_c
{
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;
@@ -3870,6 +3871,7 @@ static uint64_t gfx_v9_0_get_gpu_clock_c
((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;
}
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