How about other sdma version? like sdma v4 etc.

Regards,

David Zhou


On 2018年03月06日 17:59, Emily Deng wrote:
The sdma wptr polling memory is not fast enough, then the sdma
wptr register will be random, and not equal to sdma rptr, which
will cause sdma engine hang when load driver, so clean up the sdma
wptr directly to fix this issue.

Signed-off-by: Emily Deng <emily.d...@amd.com>
---
  drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 5 +++--
  1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 521978c..2a27928 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -719,11 +719,12 @@ static int sdma_v3_0_gfx_resume(struct amdgpu_device 
*adev)
                WREG32(mmSDMA0_GFX_RB_WPTR_POLL_ADDR_HI + sdma_offsets[i],
                       upper_32_bits(wptr_gpu_addr));
                wptr_poll_cntl = RREG32(mmSDMA0_GFX_RB_WPTR_POLL_CNTL + 
sdma_offsets[i]);
-               if (ring->use_pollmem)
+               if (ring->use_pollmem) {
+                       WREG32(mmSDMA0_GFX_RB_WPTR + sdma_offsets[i], 0);
                        wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl,
                                                       
SDMA0_GFX_RB_WPTR_POLL_CNTL,
                                                       ENABLE, 1);
-               else
+               } else
                        wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl,
                                                       
SDMA0_GFX_RB_WPTR_POLL_CNTL,
                                                       ENABLE, 0);

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