vc4: Flip around the depth/stencil fields.

After implementing depth stores, it looks like this is the way things
actually are, according to hiz-depth-read-fbo-d24-s0's probes.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/gallium/drivers/vc4/vc4_draw.c b/src/gallium/drivers/vc4/vc4_draw.c
index 311be6b7ec4..d1035bb30ab 100644
--- a/src/gallium/drivers/vc4/vc4_draw.c
+++ b/src/gallium/drivers/vc4/vc4_draw.c
@@ -224,8 +224,12 @@ vc4_clear(struct pipe_context *pctx, unsigned buffers,
                                   color->f);
         }
 
-        if (buffers & PIPE_CLEAR_DEPTH)
+        if (buffers & PIPE_CLEAR_DEPTH) {
+                /* Though the depth buffer is stored with Z in the high 24,
+                 * for this field we just need to store it in the low 24.
+                 */
                 vc4->clear_depth = util_pack_z(PIPE_FORMAT_Z24X8_UNORM, depth);
+        }
 
         vc4->cleared |= buffers;
         vc4->resolve |= buffers;