Mesa (master): radeonsi: disable SDMA on gfx9

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Module: Mesa
Branch: master
Commit: 07a49bf59766b7c40d35608a98bd4a5796dcc2fe
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=07a49bf59766b7c40d35608a98bd4a5796dcc2fe

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Mon May  4 18:25:28 2020 -0400

radeonsi: disable SDMA on gfx9

Fixes: 9680a754895 "radeonsi/gfx9: enable SDMA buffer copying & clearing"
Acked-by: Marek Olšák <marek.olsak at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4895>

---

 src/gallium/drivers/radeonsi/si_pipe.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index aa76cb81325..c323f33dd8f 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -483,6 +483,14 @@ static struct pipe_context *si_create_context(struct pipe_screen *screen, unsign
         *    https://gitlab.freedesktop.org/mesa/mesa/-/issues/1889
         */
        (sctx->chip_class != GFX8 || sscreen->debug_flags & DBG(FORCE_SDMA)) &&
+       /* SDMA causes corruption on gfx9 APUs:
+        *    https://gitlab.freedesktop.org/mesa/mesa/-/issues/2814
+        *
+        * While we could keep buffer copies and clears enabled, let's disable
+        * everything, because neither gfx8 nor gfx10 enable SDMA, and it's not
+        * easy to test.
+        */
+       (sctx->chip_class != GFX9 || sscreen->debug_flags & DBG(FORCE_SDMA)) &&
        /* SDMA timeouts sometimes on gfx10 so disable it for now. See:
         *    https://bugs.freedesktop.org/show_bug.cgi?id=111481
         *    https://gitlab.freedesktop.org/mesa/mesa/-/issues/1907