On Fri, Aug 24, 2018 at 05:46:44PM -0700, Nanley Chery wrote: > According to internal docs, some gen9 platforms have a pixel shader push > constant synchronization issue. Although not listed among said > platforms, this issue seems to be present on the GeminiLake 2x6's we've > tested. > > We consider the available workarounds to be too detrimental on > performance. Instead, we mitigate the issue by applying part of one of > the workarounds. Re-emit PUSH_CONSTANT_ALLOC at the top of every batch > (as suggested by Ken). > > Fixes ext_framebuffer_multisample-accuracy piglit test failures with the > following options: > * 6 depth_draw small depthstencil > * 8 stencil_draw small depthstencil > * 6 stencil_draw small depthstencil > * 8 depth_resolve small > * 6 stencil_resolve small depthstencil > * 4 stencil_draw small depthstencil > * 16 stencil_draw small depthstencil > * 16 depth_draw small depthstencil > * 2 stencil_resolve small depthstencil > * 6 stencil_draw small > * all_samples stencil_draw small > * 2 depth_draw small depthstencil > * all_samples depth_draw small depthstencil > * all_samples stencil_resolve small > * 4 depth_draw small depthstencil > * all_samples depth_draw small > * all_samples stencil_draw small depthstencil > * 4 stencil_resolve small depthstencil > * 4 depth_resolve small depthstencil > * all_samples stencil_resolve small depthstencil > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106865 > Cc: <mesa-sta...@lists.freedesktop.org> > --- > src/mesa/drivers/dri/i965/gen7_urb.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+)
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