+UNUSED static bool
+want_stencil_pma_fix(struct anv_cmd_buffer *cmd_buffer)
+{
+ if (GEN_GEN > 9)
+ return false;
+ assert(GEN_GEN == 9);
+
+ /* From the Skylake PRM Vol. 2c CACHE_MODE_1::STC PMA Optimization Enable:
+ *
+ * Clearing this bit will force the STC cache to wait for pending
+ * retirement of pixels at the HZ-read stage and do the STC-test for
+ * Non-promoted, R-computed and Computed depth modes instead of
+ * postponing the STC-test to RCPFE.
+ *
+ * STC_TEST_EN = 3DSTATE_STENCIL_BUFFER::STENCIL_BUFFER_ENABLE &&
+ * 3DSTATE_WM_DEPTH_STENCIL::StencilTestEnable
+ *
+ * STC_WRITE_EN = 3DSTATE_STENCIL_BUFFER::STENCIL_BUFFER_ENABLE &&
+ * (3DSTATE_WM_DEPTH_STENCIL::Stencil Buffer Write Enable &&
+ * 3DSTATE_DEPTH_BUFFER::STENCIL_WRITE_ENABLE)
+ *
+ * COMP_STC_EN = STC_TEST_EN &&
+ * 3DSTATE_PS_EXTRA::PixelShaderComputesStencil
+ *
+ * SW parses the pipeline states to generate the following logical
+ * signal indicating if PMA FIX can be enabled.
+ *
+ * STC_PMA_OPT =
+ * 3DSTATE_WM::ForceThreadDispatch != 1 &&
+ * !(3DSTATE_RASTER::ForceSampleCount != NUMRASTSAMPLES_0) &&
+ * 3DSTATE_DEPTH_BUFFER::SURFACE_TYPE != NULL &&
+ * 3DSTATE_DEPTH_BUFFER::HIZ Enable &&
+ * !(3DSTATE_WM::EDSC_Mode == 2) &&
+ * 3DSTATE_PS_EXTRA::PixelShaderValid &&
+ * !(3DSTATE_WM_HZ_OP::DepthBufferClear ||
+ * 3DSTATE_WM_HZ_OP::DepthBufferResolve ||
+ * 3DSTATE_WM_HZ_OP::Hierarchical Depth Buffer Resolve Enable ||
+ * 3DSTATE_WM_HZ_OP::StencilBufferClear) &&
+ * (COMP_STC_EN || STC_WRITE_EN) &&
+ * ((3DSTATE_PS_EXTRA::PixelShaderKillsPixels ||
+ * 3DSTATE_WM::ForceKillPix == ON ||
+ * 3DSTATE_PS_EXTRA::oMask Present to RenderTarget ||
+ * 3DSTATE_PS_BLEND::AlphaToCoverageEnable ||
+ * 3DSTATE_PS_BLEND::AlphaTestEnable ||
+ * 3DSTATE_WM_CHROMAKEY::ChromaKeyKillEnable) ||
+ * (3DSTATE_PS_EXTRA::Pixel Shader Computed Depth mode != PSCDEPTH_OFF))
+ */
+
+ /* These are always true:
+ * 3DSTATE_WM::ForceThreadDispatch != 1 &&
+ * !(3DSTATE_RASTER::ForceSampleCount != NUMRASTSAMPLES_0)
+ */
+
+ /* We only enable the PMA fix if we know for certain that HiZ is enabled.
+ * If we don't know whether HiZ is enabled or not, we disable the PMA fix
+ * and there is no harm.
+ *
+ * (3DSTATE_DEPTH_BUFFER::SURFACE_TYPE != NULL) &&
+ * 3DSTATE_DEPTH_BUFFER::HIZ Enable
+ */
+ if (!cmd_buffer->state.hiz_enabled)
+ return false;
+
+ /* We can't possibly know if HiZ is enabled without the framebuffer */
+ assert(cmd_buffer->state.framebuffer);
+
+ /* HiZ is enabled so we had better have a depth buffer with HiZ */
+ const struct anv_image_view *ds_iview =
+ anv_cmd_buffer_get_depth_stencil_view(cmd_buffer);
+ assert(ds_iview && ds_iview->image->planes[0].aux_usage == ISL_AUX_USAGE_HIZ);
+
+ /* 3DSTATE_PS_EXTRA::PixelShaderValid */
+ struct anv_graphics_pipeline *pipeline = cmd_buffer->state.gfx.pipeline;
+ if (!anv_pipeline_has_stage(pipeline, MESA_SHADER_FRAGMENT))
+ return false;
+
+ /* !(3DSTATE_WM::EDSC_Mode == 2) */
+ const struct brw_wm_prog_data *wm_prog_data = get_wm_prog_data(pipeline);
+ if (wm_prog_data->early_fragment_tests)
+ return false;
+
+ /* We never use anv_pipeline for HiZ ops so this is trivially true:
+ * !(3DSTATE_WM_HZ_OP::DepthBufferClear ||
+ * 3DSTATE_WM_HZ_OP::DepthBufferResolve ||
+ * 3DSTATE_WM_HZ_OP::Hierarchical Depth Buffer Resolve Enable ||
+ * 3DSTATE_WM_HZ_OP::StencilBufferClear)
+ */
+
+ /* 3DSTATE_STENCIL_BUFFER::STENCIL_BUFFER_ENABLE &&
+ * 3DSTATE_WM_DEPTH_STENCIL::StencilTestEnable
+ */
+ const bool stc_test_en =
+ (ds_iview->image->aspects & VK_IMAGE_ASPECT_STENCIL_BIT) &&
+ pipeline->stencil_test_enable;
+
+ /* 3DSTATE_STENCIL_BUFFER::STENCIL_BUFFER_ENABLE &&
+ * (3DSTATE_WM_DEPTH_STENCIL::Stencil Buffer Write Enable &&
+ * 3DSTATE_DEPTH_BUFFER::STENCIL_WRITE_ENABLE)
+ */
+ const bool stc_write_en =
+ (ds_iview->image->aspects & VK_IMAGE_ASPECT_STENCIL_BIT) &&
+ (cmd_buffer->state.gfx.dynamic.stencil_write_mask.front ||
+ cmd_buffer->state.gfx.dynamic.stencil_write_mask.back) &&
+ pipeline->writes_stencil;
+
+ /* STC_TEST_EN && 3DSTATE_PS_EXTRA::PixelShaderComputesStencil */
+ const bool comp_stc_en = stc_test_en && wm_prog_data->computed_stencil;
+
+ /* COMP_STC_EN || STC_WRITE_EN */
+ if (!(comp_stc_en || stc_write_en))
+ return false;
+
+ /* (3DSTATE_PS_EXTRA::PixelShaderKillsPixels ||
+ * 3DSTATE_WM::ForceKillPix == ON ||
+ * 3DSTATE_PS_EXTRA::oMask Present to RenderTarget ||
+ * 3DSTATE_PS_BLEND::AlphaToCoverageEnable ||
+ * 3DSTATE_PS_BLEND::AlphaTestEnable ||
+ * 3DSTATE_WM_CHROMAKEY::ChromaKeyKillEnable) ||
+ * (3DSTATE_PS_EXTRA::Pixel Shader Computed Depth mode != PSCDEPTH_OFF)
+ */
+ return pipeline->kill_pixel ||
+ wm_prog_data->computed_depth_mode != PSCDEPTH_OFF;
+}
+