Bug 102955

Created attachment 134450 [details]
glxinfo.log

Oh, should have probably mentioned X versions and such.
* Xorg 1.19.3
* xf86-video-amdgpu 1.4.0

Added glxinfo output.

I confirm this issue and that R600_DEBUG=nohyperz does fix it.

Thanks to Elliot Thomas for finding a temporary solution.

Workaround:

diff --git a/src/gallium/drivers/radeonsi/si_blit.c b/src/gallium/drivers/radeonsi/si_blit.c
index 67972a2..dc71742 100644
--- a/src/gallium/drivers/radeonsi/si_blit.c
+++ b/src/gallium/drivers/radeonsi/si_blit.c
@@ -903,6 +903,14 @@ static void si_clear(struct pipe_context *ctx, unsigned buffers,
                        sctx->db_stencil_clear = true;
                        si_mark_atom_dirty(sctx, &sctx->db_render_state);
                }
+
+               /* TODO: Find out what's wrong here. Fast depth clear with
+                * a dirty DB cache causes corruption in ARK: Survival Evolved.
+                * https://bugs.freedesktop.org/show_bug.cgi?id=102955
+                *
+                * This hack massively decreases back-to-back ClearDepth performance.
+                */
+               sctx->b.flags |= SI_CONTEXT_FLUSH_AND_INV_DB;
        }
 
        si_blitter_begin(ctx, SI_CLEAR);

I can confirm Marek's workaround works.

For what it's worth, I couldn't really measure a difference in performance between the explicit DB flush/invalidation patch and using R600_DEBUG=nohyperz.

Should be "fixed" with c4d1a199f8379b3982a53fb18fe2b50fafd682df.

The DB metadata flush workaround is broken as of mesa git 69ccb9dae7616038dd54d3833da9e7c68e28067d, "radeonsi: use new VS blit shaders (VS inputs in SGPRs)".

The R600_DEBUG=nohyperz workaround still works.

Should be fixed with dd79aa4ad30df205076be25f6bbf42768abea20a.

Broken again in at latest 19.1.2.

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