commit 1c6eca23fdd8bc112c70914100601d0e382a8154
author Marek Olšák <marek.olsak@amd.com> Mon Jul 06 23:51:25 2020 -0400
committer Marek Olšák <marek.olsak@amd.com> Wed Jul 22 12:08:19 2020 -0400
tree 4b74e949b02b3737d0eafdece9abf1f55a369665
parent d244a25c072557edd1133356b94557938c000f78

radeonsi/gfx10: set the correct value for OFFCHIP_BUFFERING

Copied from PAL. Higher values break tessellation, which I was only able
to reproduce with register shadowing enabled.

Fixes: 0bf3e6fae7f82b4f16fbcbb05a1ae47f7930e189 "radeonsi/gfx10: double the number of tessellation offchip buffers per SE"

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5798>

src/gallium/drivers/radeonsi/si_pipe.c

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 46f2ff7..9501cb7 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -1081,7 +1081,7 @@
    unsigned max_offchip_buffers_per_se;
 
    if (sscreen->info.chip_class >= GFX10)
-      max_offchip_buffers_per_se = 256;
+      max_offchip_buffers_per_se = 128;
    /* Only certain chips can use the maximum value. */
    else if (sscreen->info.family == CHIP_VEGA12 || sscreen->info.family == CHIP_VEGA20)
       max_offchip_buffers_per_se = double_offchip_buffers ? 128 : 64;