From: Horace Chen Date: Thu, 21 Jul 2022 04:18:18 +0000 (+0800) Subject: drm/amdgpu: enable WPTR_POLL_ENABLE for sriov on sdma_v6_0 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=afb50906cf029a40b713c60d8800d3ee25ebe03d;p=linux.git drm/amdgpu: enable WPTR_POLL_ENABLE for sriov on sdma_v6_0 [Why] Under SR-IOV, if VF is switched out then its doorbell will be disabled, SDMA rely on WPTR_POLL to get doorbells which was sent during VF switched-out time. [How] For SR-IOV, set SDMA WPTR_POLL_ENABLE to 1. Acked-by: Christian König Signed-off-by: Horace Chen Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c index 2bc1407e885e0..fb31dc911cd71 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c @@ -594,7 +594,10 @@ static int sdma_v6_0_gfx_resume(struct amdgpu_device *adev) lower_32_bits(ring->rptr_gpu_addr) & 0xFFFFFFFC); rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, RPTR_WRITEBACK_ENABLE, 1); - rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, WPTR_POLL_ENABLE, 0); + if (amdgpu_sriov_vf(adev)) + rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, WPTR_POLL_ENABLE, 1); + else + rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, WPTR_POLL_ENABLE, 0); rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, F32_WPTR_POLL_ENABLE, 1); WREG32_SOC15_IP(GC, sdma_v6_0_get_reg_offset(adev, i, regSDMA0_QUEUE0_RB_BASE), ring->gpu_addr >> 8);