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radv: add multisample Z optimisation from amdvlk

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This was just found while reading for other stuff,
src/core/hw/gfxip/gfx6/gfx6DepthStencilView.cpp.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2018-01-24 13:13:49 +10:00
parent 298554541d
commit d2414e64e4
1 changed files with 3 additions and 0 deletions
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src/amd/vulkan/radv_pipeline.c
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@@ -714,6 +714,9 @@ radv_pipeline_init_depth_stencil_state(struct radv_pipeline *pipeline,
S_028800_Z_WRITE_ENABLE(vkds->depthWriteEnable ? 1 : 0) |
S_028800_ZFUNC(vkds->depthCompareOp) |
S_028800_DEPTH_BOUNDS_ENABLE(vkds->depthBoundsTestEnable ? 1 : 0);
/* from amdvlk: For 4xAA and 8xAA need to decompress on flush for better performance */
ds->db_render_override2 |= S_028010_DECOMPRESS_Z_ON_FLUSH(attachment->samples > 2);
}
if (has_stencil_attachment && vkds->stencilTestEnable) {