intel/blorp: Set up some other state for WM_HZ_OPwip/fix/hiz-bugs

TODO: Test what happens when setting each of those bits to their opposite value.
XXX: Split each addition into a patch.
XXX: Finish writing the documentation.

1 files changed, 33 insertions, 0 deletions

diff --git a/src/intel/blorp/blorp_genX_exec.h b/src/intel/blorp/blorp_genX_exec.h
index 065980616ec..91ddff80933 100644
--- a/src/intel/blorp/blorp_genX_exec.h
+++ b/src/intel/blorp/blorp_genX_exec.h
@@ -1617,6 +1617,10 @@ blorp_emit_gen8_hiz_op(struct blorp_batch *batch,
    if (params->stencil.enabled)
       assert(params->hiz_op == ISL_AUX_OP_FAST_CLEAR);
 
+   blorp_emit(batch, GENX(3DSTATE_PS_BLEND), ps_blend) {
+      ps_blend.AlphaTestEnable = false;
+   }
+
    /* From the BDW PRM Volume 2, 3DSTATE_WM_HZ_OP:
     *
     * 3DSTATE_MULTISAMPLE packet must be used prior to this packet to change
@@ -1628,6 +1632,35 @@ blorp_emit_gen8_hiz_op(struct blorp_batch *batch,
     */
    blorp_emit_3dstate_multisample(batch, params);
 
+   /* From the BDW PRM Volume 2, 3DSTATE_WM_HZ_OP:
+    *  
+    *    3DSTATE_RASTER if used must be programmed prior to using this packet.
+    *
+    * The formula for WM_INT::Multisample Rasterization Mode shows that
+    * 3DSTATE_RASTER::Force Multisampling has the ability to override
+    * 3DSTATE_WM_HZ_OP::Number of Multisamples. Disable the override by setting
+    * it to false.
+    */
+   blorp_emit(batch, GENX(3DSTATE_RASTER), raster) {
+      raster.ForceMultisampling = false;
+   }
+
+   /* From the BDW+ HW docs XXX:
+    *
+    *    WM_INT::Pixel Shader Computed Depth Mode =
+    *       (3DSTATE_PS_EXTRA::ForceComputedDepth == Force) ?
+    *       3DSTATE_PS_EXTRA::Pixel Shader Computed Depth Mode :
+    *       (WM_INT::WM_HZ_OP || WM_INT::RT Independent Rasterization Enable ) ?
+    *       PSCDEPTH_OFF:
+    *       3DSTATE_PS_EXTRA::Pixel Shader Computed Depth Mode
+    *
+    * To avoid 3DSTATE_PS_EXTRA::ForceComputedDepth from overriding
+    * 3DSTATE_WM_HZ_OP's preverence of PSCDEPTH_OFF, set it to false.
+    */
+   blorp_emit(batch, GENX(3DSTATE_PS_EXTRA), psx) {
+      psx.ForceComputedDepth = false;
+   }
+
    /* From the BDW PRM Volume 7, Depth Buffer Clear:
     *
     *    The clear value must be between the min and max depth values