[Why] Under SR-IOV, we are not sure whether pipe status is good or not when doing initialization. The compute engine maybe fail to bringup if pipe status is bad. [How] For SR-IOV, disable the compute engine to do a pipe reset before we do initialization. Signed-off-by: Horace Chen <horace.chen@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c index 0d8193b30fc5..75556370028e 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c @@ -2754,6 +2754,21 @@ static void gfx_v11_0_config_gfx_rs64(struct amdgpu_device *adev) mec_hdr->ucode_start_addr_hi >> 2); } soc21_grbm_select(adev, 0, 0, 0, 0); + + /* reset mec pipe */ + tmp = RREG32_SOC15(GC, 0, regCP_MEC_RS64_CNTL); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE0_RESET, 1); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE1_RESET, 1); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE2_RESET, 1); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE3_RESET, 1); + WREG32_SOC15(GC, 0, regCP_MEC_RS64_CNTL, tmp); + + /* clear mec pipe reset */ + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE0_RESET, 0); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE1_RESET, 0); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE2_RESET, 0); + tmp = REG_SET_FIELD(tmp, CP_MEC_RS64_CNTL, MEC_PIPE3_RESET, 0); + WREG32_SOC15(GC, 0, regCP_MEC_RS64_CNTL, tmp); } static int gfx_v11_0_wait_for_rlc_autoload_complete(struct amdgpu_device *adev) -- 2.25.1
