Mesa (main): zink: export PIPE_CAP_TGSI_BALLOT

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Module: Mesa
Branch: main
Commit: 627371fe014fd2d1654592be07da498f3af3b08c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=627371fe014fd2d1654592be07da498f3af3b08c

Author: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Date:   Mon Apr  5 12:02:39 2021 -0400

zink: export PIPE_CAP_TGSI_BALLOT

Reviewed-by: Dave Airlie <airlied at redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11990>

---

 docs/features.txt                      | 2 +-
 src/gallium/drivers/zink/zink_screen.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/features.txt b/docs/features.txt
index 5ee8971d45f..b3ee73b8368 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -306,7 +306,7 @@ Khronos, ARB, and OES extensions that are not part of any OpenGL or OpenGL ES ve
   GL_ARB_robustness_isolation                           not started
   GL_ARB_sample_locations                               DONE (nvc0, zink)
   GL_ARB_seamless_cubemap_per_texture                   DONE (etnaviv/SEAMLESS_CUBE_MAP, freedreno, i965, nvc0, r600, radeonsi, softpipe, swr, virgl)
-  GL_ARB_shader_ballot                                  DONE (i965/gen8+, nvc0, radeonsi)
+  GL_ARB_shader_ballot                                  DONE (i965/gen8+, nvc0, radeonsi, zink)
   GL_ARB_shader_clock                                   DONE (i965/gen7+, nv50, nvc0, r600, radeonsi, virgl, zink)
   GL_ARB_shader_stencil_export                          DONE (i965/gen9+, r600, radeonsi, softpipe, llvmpipe, swr, virgl, panfrost, zink)
   GL_ARB_shader_viewport_layer_array                    DONE (i965/gen6+, nvc0, radeonsi, zink)
diff --git a/src/gallium/drivers/zink/zink_screen.c b/src/gallium/drivers/zink/zink_screen.c
index 19893ddeefa..ef8da6d55ca 100644
--- a/src/gallium/drivers/zink/zink_screen.c
+++ b/src/gallium/drivers/zink/zink_screen.c
@@ -409,6 +409,9 @@ zink_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_POINT_SPRITE:
       return 1;
 
+   case PIPE_CAP_TGSI_BALLOT:
+      return screen->vk_version >= VK_MAKE_VERSION(1,2,0) && screen->info.props11.subgroupSize <= 64;
+
    case PIPE_CAP_SAMPLE_SHADING:
       return screen->info.feats.features.sampleRateShading;