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

[Prike Liang]

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

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

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
index e4a96e7e386d..81906955ef52 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -868,6 +868,12 @@ static int sdma_v5_2_start(struct amdgpu_device *adev)
                        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);
@@ -876,6 +882,8 @@ static int sdma_v5_2_start(struct amdgpu_device *adev)
 
        /* 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);
-- 
2.17.1