From: Nanley Chery Date: Thu, 11 Oct 2018 23:31:08 +0000 (-0700) Subject: anv: Clear WM_HZ_OP overrides in init_device_state X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0ee0e0b6b94bf2b7041da59b67220234f605ae60;p=mesa.git anv: Clear WM_HZ_OP overrides in init_device_state This is basically a port of commit, 3ade766684933ac84e41634429fb693f85353c11 ("i965: Disable 3DSTATE_WM_HZ_OP fields.") The BDW+ docs describe how to use the 3DSTATE_WM_HZ_OP instruction in the section titled, "Optimized Depth Buffer Clear and/or Stencil Buffer Clear." It mentions that the packet overrides GPU state for the clear operation and needs to be reset to 0s to clear the overrides. Depending on the kernel, we may not get a context with the GPU state for this packet zeroed. Do it ourselves just in case. Prevents a number of GPU hangs when running crucible on ICL. I tried to get the exact number of hangs that occurs without this patch, but was unsuccessful. The test machine became unresponsive before completing the full run. Reviewed-by: Kenneth Graunke --- diff --git a/src/intel/vulkan/genX_state.c b/src/intel/vulkan/genX_state.c index 75bcd96d78a..42800a2581e 100644 --- a/src/intel/vulkan/genX_state.c +++ b/src/intel/vulkan/genX_state.c @@ -157,6 +157,16 @@ genX(init_device_state)(struct anv_device *device) GEN_SAMPLE_POS_16X(sp._16xSample); #endif } + + /* The BDW+ docs describe how to use the 3DSTATE_WM_HZ_OP instruction in the + * section titled, "Optimized Depth Buffer Clear and/or Stencil Buffer + * Clear." It mentions that the packet overrides GPU state for the clear + * operation and needs to be reset to 0s to clear the overrides. Depending + * on the kernel, we may not get a context with the state for this packet + * zeroed. Do it ourselves just in case. We've observed this to prevent a + * number of GPU hangs on ICL. + */ + anv_batch_emit(&batch, GENX(3DSTATE_WM_HZ_OP), hzp); #endif #if GEN_GEN == 10