KIQ will hang if we try below steps: modprobe amdgpu rmmod amdgpu modprobe amdgpu sched_hw_submission=4 the cause is that due to KIQ is always living there even after we unload KMD thus when doing the realod of KMD KIQ will crash upon its register programed with different values with the previous configuration (the config like HQD addr, ring size, is easily changed if we alter the sched_hw_submission) the fix is we must inactive KIQ first before touching any of its registgers Signed-off-by: Monk Liu <Monk.Liu@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c index db9f1e8..f571e25 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c @@ -6433,6 +6433,9 @@ static int gfx_v10_0_kiq_init_register(struct amdgpu_ring *ring) struct v10_compute_mqd *mqd = ring->mqd_ptr; int j; + /* activate the queue */ + WREG32_SOC15(GC, 0, mmCP_HQD_ACTIVE, 0); + /* disable wptr polling */ WREG32_FIELD15(GC, 0, CP_PQ_WPTR_POLL_CNTL, EN, 0); -- 2.7.4 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
