Sometimes IH do not setup ring wptr overflow flag after wptr exceed rptr. As a workaround, if IH rptr equals to wptr, ring is empty, return true to indicate IH ring checkpoint is processed, IH ring drain is finished. Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c index faaa6aa2faaf..a36e191cf086 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c @@ -175,7 +175,9 @@ static bool amdgpu_ih_has_checkpoint_processed(struct amdgpu_device *adev, cur_rptr += ih->ptr_mask + 1; *prev_rptr = cur_rptr; - return cur_rptr >= checkpoint_wptr; + /* check ring is empty to workaround missing wptr overflow flag */ + return cur_rptr >= checkpoint_wptr || + (cur_rptr & ih->ptr_mask) == amdgpu_ih_get_wptr(adev, ih); } /** -- 2.17.1 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
