Mesa (wip/tgl-depth-bounds-test): iris: Add support for depth bounds testing.

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Module: Mesa
Branch: wip/tgl-depth-bounds-test
Commit: a2372ffa0bb26f835bd797fca60f93c32a619af8
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a2372ffa0bb26f835bd797fca60f93c32a619af8

Author: Plamena Manolova <plamena.manolova at intel.com>
Date:   Wed Oct 23 20:56:45 2019 +0100

iris: Add support for depth bounds testing.

In gen12 we use the 3DSTATE_DEPTH_BOUNDS instruction
to enable depth bounds testing.

Signed-off-by: Plamena Manolova <plamena.manolova at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/gallium/drivers/iris/iris_context.h |  1 +
 src/gallium/drivers/iris/iris_state.c   | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/src/gallium/drivers/iris/iris_context.h b/src/gallium/drivers/iris/iris_context.h
index 74a66f4a5cf..9fbfa1072f9 100644
--- a/src/gallium/drivers/iris/iris_context.h
+++ b/src/gallium/drivers/iris/iris_context.h
@@ -135,6 +135,7 @@ enum {
 #define IRIS_DIRTY_COMPUTE_RESOLVES_AND_FLUSHES (1ull << 56)
 #define IRIS_DIRTY_VF_STATISTICS            (1ull << 57)
 #define IRIS_DIRTY_PMA_FIX                  (1ull << 58)
+#define IRIS_DIRTY_DEPTH_BOUNDS             (1ull << 59)
 
 #define IRIS_ALL_DIRTY_FOR_COMPUTE (IRIS_DIRTY_CS | \
                                     IRIS_DIRTY_SAMPLER_STATES_CS | \
diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index ac6a5dd5fd1..36eb3a6c8fa 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -1277,6 +1277,10 @@ struct iris_depth_stencil_alpha_state {
    /** Partial 3DSTATE_WM_DEPTH_STENCIL. */
    uint32_t wmds[GENX(3DSTATE_WM_DEPTH_STENCIL_length)];
 
+#if GEN_GEN >= 12
+   uint32_t depth_bounds[GENX(3DSTATE_DEPTH_BOUNDS_length)];
+#endif
+
    /** Outbound to BLEND_STATE, 3DSTATE_PS_BLEND, COLOR_CALC_STATE. */
    struct pipe_alpha_state alpha;
 
@@ -1339,6 +1343,16 @@ iris_create_zsa_state(struct pipe_context *ctx,
       /* wmds.[Backface]StencilReferenceValue are merged later */
    }
 
+#if GEN_GEN >= 12
+   iris_pack_command(GENX(3DSTATE_DEPTH_BOUNDS), cso->depth_bounds, depth_bounds) {
+      depth_bounds.DepthBoundsTestValueModifyDisable = false;
+      depth_bounds.DepthBoundsTestEnableModifyDisable = false;
+      depth_bounds.DepthBoundsTestEnable = state->depth.bounds_test;
+      depth_bounds.DepthBoundsTestMinValue = state->depth.bounds_min;
+      depth_bounds.DepthBoundsTestMaxValue = state->depth.bounds_max;
+   }
+#endif
+
    return cso;
 }
 
@@ -1369,6 +1383,11 @@ iris_bind_zsa_state(struct pipe_context *ctx, void *state)
 
       ice->state.depth_writes_enabled = new_cso->depth_writes_enabled;
       ice->state.stencil_writes_enabled = new_cso->stencil_writes_enabled;
+
+#if GEN_GEN >= 12
+      if (cso_changed(depth_bounds))
+         ice->state.dirty |= IRIS_DIRTY_DEPTH_BOUNDS;
+#endif
    }
 
    ice->state.cso_zsa = new_cso;
@@ -5531,6 +5550,10 @@ iris_upload_dirty_render_state(struct iris_context *ice,
 #else
       iris_batch_emit(batch, cso->wmds, sizeof(cso->wmds));
 #endif
+
+#if GEN_GEN >= 12
+      iris_batch_emit(batch, cso->depth_bounds, sizeof(cso->depth_bounds));
+#endif
    }
 
    if (dirty & IRIS_DIRTY_SCISSOR_RECT) {