[PATCH 5.14 070/172] drm/amdgpu: force exit gfxoff on sdma resume for rmb s0ix

Greg Kroah-Hartman
2021-10-04T13:33:07Z

From: Prike Liang <Prike.Liang@amd.com>

commit 26db706a6d77b9e184feb11725e97e53b7a89519 upstream.

In the s2idle stress test sdma resume fail occasionally,in the
failed case GPU is in the gfxoff state.This issue may introduce
by firmware miss handle doorbell S/R and now temporary fix the issue
by forcing exit gfxoff for sdma resume.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@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>
---
drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -883,6 +883,12 @@ static int sdma_v5_2_start(struct amdgpu
msleep(1000);
}

+ /* TODO: check whether can submit a doorbell request to raise
+ * a doorbell fence to exit gfxoff.
+ */
+ if (adev->in_s0ix)
+ amdgpu_gfx_off_ctrl(adev, false);
+
sdma_v5_2_soft_reset(adev);
/* unhalt the MEs */
sdma_v5_2_enable(adev, true);
@@ -891,6 +897,8 @@ static int sdma_v5_2_start(struct amdgpu

/* start the gfx rings and rlc compute queues */
r = sdma_v5_2_gfx_resume(adev);
+ if (adev->in_s0ix)
+ amdgpu_gfx_off_ctrl(adev, true);
if (r)
return r;
r = sdma_v5_2_rlc_resume(adev);