[Mesa-dev] [PATCH] radeonsi: reduce MAX_GEOMETRY_OUTPUT_VERTICES

[Marek Olšák]

From: Nicolai Hähnle <nicolai.haehnle at amd.com>

This fixes piglit spec at glsl-1.50@gs-max-output.
---
 src/gallium/drivers/radeonsi/si_get.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/radeonsi/si_get.c b/src/gallium/drivers/radeonsi/si_get.c
index c1bddca1a66..9496817ac84 100644
--- a/src/gallium/drivers/radeonsi/si_get.c
+++ b/src/gallium/drivers/radeonsi/si_get.c
@@ -256,21 +256,23 @@ static int si_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 		return sscreen->info.chip_class <= GFX8 ?
 			PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600 : 0;
 
 	/* Stream output. */
 	case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 	case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 		return 32*4;
 
 	/* Geometry shader output. */
 	case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
-		return 1024;
+		/* gfx8 and earlier can do more, but nobody uses it because it
+		 * would be a bad idea for performance. */
+		return 256;
 	case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 		return 4095;
 	case PIPE_CAP_MAX_GS_INVOCATIONS:
 		/* The closed driver exposes 127, but 125 is the greatest
 		 * number that works. */
 		return 125;
 
 	case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 		return 2048;
 
-- 
2.17.1