iris: Set XY Clipping correctly.

I was setting it based off a pipe_rasterizer_state field that appears
to be entirely dead outside of the draw module respecting it.

I should be setting it when the primitive type reaching the SF is
neither points nor lines.  This is, unfortunately, rather dirty,
as we have to look at the rasterizer state, the geometry shader state,
the tessellation evaluation shader state, and the primitive type...

4 files changed, 67 insertions, 2 deletions

diff --git a/src/gallium/drivers/iris/iris_context.h b/src/gallium/drivers/iris/iris_context.h
index 51bbdb681e7..31f345d36b0 100644
--- a/src/gallium/drivers/iris/iris_context.h
+++ b/src/gallium/drivers/iris/iris_context.h
@@ -504,6 +504,9 @@ struct iris_context {
 
       unsigned urb_size;
 
+      /** Is a GS or TES outputting points or lines? */
+      bool output_topology_is_points_or_lines;
+
       /* Track last VS URB entry size */
       unsigned last_vs_entry_size;
 
@@ -548,6 +551,7 @@ struct iris_context {
       bool primitive_restart;
       unsigned cut_index;
       enum pipe_prim_type prim_mode:8;
+      bool prim_is_points_or_lines;
       uint8_t vertices_per_patch;
 
       /** The last compute grid size */
diff --git a/src/gallium/drivers/iris/iris_draw.c b/src/gallium/drivers/iris/iris_draw.c
index 94af728c693..86fc95cac0c 100644
--- a/src/gallium/drivers/iris/iris_draw.c
+++ b/src/gallium/drivers/iris/iris_draw.c
@@ -36,9 +36,22 @@
 #include "util/u_transfer.h"
 #include "util/u_upload_mgr.h"
 #include "intel/compiler/brw_compiler.h"
+#include "intel/compiler/brw_eu_defines.h"
 #include "iris_context.h"
 #include "iris_defines.h"
 
+static bool
+prim_is_points_or_lines(const struct pipe_draw_info *draw)
+{
+   /* We don't need to worry about adjacency - it can only be used with
+    * geometry shaders, and we don't care about this info when GS is on.
+    */
+   return draw->mode == PIPE_PRIM_POINTS ||
+          draw->mode == PIPE_PRIM_LINES ||
+          draw->mode == PIPE_PRIM_LINE_LOOP ||
+          draw->mode == PIPE_PRIM_LINE_STRIP;
+}
+
 /**
  * Record the current primitive mode and restart information, flagging
  * related packets as dirty if necessary.
@@ -50,6 +63,14 @@ iris_update_draw_info(struct iris_context *ice,
    if (ice->state.prim_mode != info->mode) {
       ice->state.prim_mode = info->mode;
       ice->state.dirty |= IRIS_DIRTY_VF_TOPOLOGY;
+
+
+      /* For XY Clip enables */
+      bool points_or_lines = prim_is_points_or_lines(info);
+      if (points_or_lines != ice->state.prim_is_points_or_lines) {
+         ice->state.prim_is_points_or_lines = points_or_lines;
+         ice->state.dirty |= IRIS_DIRTY_CLIP;
+      }
    }
 
    if (info->mode == PIPE_PRIM_PATCHES &&
diff --git a/src/gallium/drivers/iris/iris_program.c b/src/gallium/drivers/iris/iris_program.c
index eff7c775212..30ec3f1ff86 100644
--- a/src/gallium/drivers/iris/iris_program.c
+++ b/src/gallium/drivers/iris/iris_program.c
@@ -1241,6 +1241,33 @@ iris_update_compiled_shaders(struct iris_context *ice)
    if (dirty & IRIS_DIRTY_UNCOMPILED_GS)
       iris_update_compiled_gs(ice);
 
+   if (dirty & (IRIS_DIRTY_UNCOMPILED_GS | IRIS_DIRTY_UNCOMPILED_TES)) {
+      const struct iris_compiled_shader *gs =
+         ice->shaders.prog[MESA_SHADER_GEOMETRY];
+      const struct iris_compiled_shader *tes =
+         ice->shaders.prog[MESA_SHADER_TESS_EVAL];
+
+      bool points_or_lines = false;
+
+      if (gs) {
+         const struct brw_gs_prog_data *gs_prog_data = (void *) gs->prog_data;
+         points_or_lines =
+            gs_prog_data->output_topology == _3DPRIM_POINTLIST ||
+            gs_prog_data->output_topology == _3DPRIM_LINESTRIP;
+      } else if (tes) {
+         const struct brw_tes_prog_data *tes_data = (void *) tes->prog_data;
+         points_or_lines =
+            tes_data->output_topology == BRW_TESS_OUTPUT_TOPOLOGY_LINE ||
+            tes_data->output_topology == BRW_TESS_OUTPUT_TOPOLOGY_POINT;
+      }
+
+      if (ice->shaders.output_topology_is_points_or_lines != points_or_lines) {
+         /* Outbound to XY Clip enables */
+         ice->shaders.output_topology_is_points_or_lines = points_or_lines;
+         ice->state.dirty |= IRIS_DIRTY_CLIP;
+      }
+   }
+
    gl_shader_stage last_stage = last_vue_stage(ice);
    struct iris_compiled_shader *shader = ice->shaders.prog[last_stage];
    struct iris_uncompiled_shader *ish = ice->shaders.uncompiled[last_stage];
@@ -1261,7 +1288,6 @@ iris_update_compiled_shaders(struct iris_context *ice)
 
    if (dirty & IRIS_DIRTY_UNCOMPILED_FS)
       iris_update_compiled_fs(ice);
-   // ...
 
    /* Changing shader interfaces may require a URB configuration. */
    if (!(dirty & IRIS_DIRTY_URB)) {
diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 479703f30fa..91659f4f67b 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -1182,6 +1182,7 @@ struct iris_rasterizer_state {
    bool multisample;
    bool force_persample_interp;
    bool conservative_rasterization;
+   bool fill_mode_point_or_line;
    enum pipe_sprite_coord_mode sprite_coord_mode; /* PIPE_SPRITE_* */
    uint16_t sprite_coord_enable;
 };
@@ -1244,6 +1245,12 @@ iris_create_rasterizer_state(struct pipe_context *ctx,
    cso->conservative_rasterization =
       state->conservative_raster_mode == PIPE_CONSERVATIVE_RASTER_POST_SNAP;
 
+   cso->fill_mode_point_or_line =
+      state->fill_front == PIPE_POLYGON_MODE_LINE ||
+      state->fill_front == PIPE_POLYGON_MODE_POINT ||
+      state->fill_back == PIPE_POLYGON_MODE_LINE ||
+      state->fill_back == PIPE_POLYGON_MODE_POINT;
+
    if (state->clip_plane_enable != 0)
       cso->num_clip_plane_consts = util_logbase2(state->clip_plane_enable) + 1;
    else
@@ -1308,7 +1315,6 @@ iris_create_rasterizer_state(struct pipe_context *ctx,
       cl.APIMode = state->clip_halfz ? APIMODE_D3D : APIMODE_OGL;
       cl.GuardbandClipTestEnable = true;
       cl.ClipEnable = true;
-      cl.ViewportXYClipTestEnable = state->point_tri_clip;
       cl.MinimumPointWidth = 0.125;
       cl.MaximumPointWidth = 255.875;
 
@@ -4770,11 +4776,19 @@ iris_upload_dirty_render_state(struct iris_context *ice,
       struct iris_rasterizer_state *cso_rast = ice->state.cso_rast;
       struct pipe_framebuffer_state *cso_fb = &ice->state.framebuffer;
 
+      bool gs_or_tes = ice->shaders.prog[MESA_SHADER_GEOMETRY] ||
+                       ice->shaders.prog[MESA_SHADER_TESS_EVAL];
+      bool points_or_lines = cso_rast->fill_mode_point_or_line ||
+         (gs_or_tes ? ice->shaders.output_topology_is_points_or_lines
+                    : ice->state.prim_is_points_or_lines);
+
       uint32_t dynamic_clip[GENX(3DSTATE_CLIP_length)];
       iris_pack_command(GENX(3DSTATE_CLIP), &dynamic_clip, cl) {
          cl.StatisticsEnable = ice->state.statistics_counters_enabled;
          cl.ClipMode = cso_rast->rasterizer_discard ? CLIPMODE_REJECT_ALL
                                                     : CLIPMODE_NORMAL;
+         cl.ViewportXYClipTestEnable = !points_or_lines;
+
          if (wm_prog_data->barycentric_interp_modes &
              BRW_BARYCENTRIC_NONPERSPECTIVE_BITS)
             cl.NonPerspectiveBarycentricEnable = true;