From: Marek Olšák <marek.olsak@amd.com>
Date: Tue, 27 Aug 2019 21:39:02 +0000 (-0400)
Subject: radeonsi: only support at most 1024 threads per block
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=42ea0b7b52d78fc923e50a0825859fe079fd8c35;p=mesa.git

radeonsi: only support at most 1024 threads per block

LLVM 10 won't support 2048.

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
---

diff --git a/src/gallium/drivers/radeonsi/si_get.c b/src/gallium/drivers/radeonsi/si_get.c
index 118301fbf4b..111279674e6 100644
--- a/src/gallium/drivers/radeonsi/si_get.c
+++ b/src/gallium/drivers/radeonsi/si_get.c
@@ -752,14 +752,8 @@ static unsigned get_max_threads_per_block(struct si_screen *screen,
 	if (ir_type == PIPE_SHADER_IR_NATIVE)
 		return 256;
 
-	/* Only 16 waves per thread-group on gfx9. */
-	if (screen->info.chip_class >= GFX9)
-		return 1024;
-
-	/* Up to 40 waves per thread-group on GCN < gfx9. Expose a nice
-	 * round number.
-	 */
-	return 2048;
+        /* LLVM 10 only supports 1024 threads per block. */
+	return 1024;
 }
 
 static int si_get_compute_param(struct pipe_screen *screen,