freedreno: Disable UBWC on Z24S8 if not TEXTURE_2D.

Fixes two of our three remaining GLES CTS failures, and avoids more
regressions once we enable UBWC mipmaps.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3059>

diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_resource.c b/src/gallium/drivers/freedreno/a6xx/fd6_resource.c
index 954024cfb12322fc5341e8d17446c886e1336d31..d35a42156bb841bf691754998d18d2a0f9ebed9f 100644 (file)
--- a/src/gallium/drivers/freedreno/a6xx/fd6_resource.c
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_resource.c
@@ -35,7 +35,7 @@
  * it can be tiled doesn't mean it can be compressed.
  */
 static bool
-ok_ubwc_format(enum pipe_format pfmt)
+ok_ubwc_format(struct fd_resource *rsc, enum pipe_format pfmt)
 {
        /* NOTE: both x24s8 and z24s8 map to RB6_X8Z24_UNORM, but UBWC
         * does not seem to work properly when sampling x24s8.. possibly
@@ -48,6 +48,14 @@ ok_ubwc_format(enum pipe_format pfmt)
        if (pfmt == PIPE_FORMAT_X24S8_UINT)
                return false;
 
+       /* We don't fully understand what's going wrong with this combination, but
+        * we haven't been able to make it work.  It's enough of a corner-case
+        * that we can just disable UBWC for these resources.
+        */
+       if (rsc->base.target != PIPE_TEXTURE_2D &&
+                       pfmt == PIPE_FORMAT_Z24_UNORM_S8_UINT)
+               return false;
+
        switch (fd6_pipe2color(pfmt)) {
        case RB6_R10G10B10A2_UINT:
        case RB6_R10G10B10A2_UNORM:
@@ -92,7 +100,7 @@ fd6_fill_ubwc_buffer_sizes(struct fd_resource *rsc)
        uint32_t width = prsc->width0;
        uint32_t height = prsc->height0;
 
-       if (!ok_ubwc_format(prsc->format))
+       if (!ok_ubwc_format(rsc, prsc->format))
                return 0;
 
        /* limit things to simple single level 2d for now: */
@@ -154,7 +162,7 @@ fd6_validate_format(struct fd_context *ctx, struct fd_resource *rsc,
        if (!rsc->layout.ubwc_layer_size)
                return;
 
-       if (ok_ubwc_format(format))
+       if (ok_ubwc_format(rsc, format))
                return;
 
        fd_resource_uncompress(ctx, rsc);