[Mesa-stable] [PATCH] r600: reduce num compute threads to 1024.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

I copied this value from radeonsi, but it was wrong, 1024
seems to be correct answer from looking at gpuinfo.

This should fix a few compute shader related hangs. (at least in CTS)

Cc: <mesa-stable at lists.freedesktop.org>
---
 src/gallium/drivers/r600/r600_pipe_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/drivers/r600/r600_pipe_common.c b/src/gallium/drivers/r600/r600_pipe_common.c
index a8ea9c4485..f7cfd0d46a 100644
--- a/src/gallium/drivers/r600/r600_pipe_common.c
+++ b/src/gallium/drivers/r600/r600_pipe_common.c
@@ -998,7 +998,7 @@ static unsigned get_max_threads_per_block(struct r600_common_screen *screen,
 	if (ir_type != PIPE_SHADER_IR_TGSI)
 		return 256;
 	if (screen->chip_class >= EVERGREEN)
-		return 2048;
+		return 1024;
 	return 256;
 }
 
-- 
2.17.1