[Mesa-dev] [PATCH] ac/surface: handle S8 on gfx9

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

If we don't have a depth piece, we don't get a correct
swizzle mode and we hit an assert in addrlib.

In case of no depth get the preferrred swizzle mode for
stencil alone.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/amd/common/ac_surface.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/amd/common/ac_surface.c b/src/amd/common/ac_surface.c
index 88cc8a1..850d707 100644
--- a/src/amd/common/ac_surface.c
+++ b/src/amd/common/ac_surface.c
@@ -1138,9 +1138,14 @@ static int gfx9_compute_surface(ADDR_HANDLE addrlib,
 
 	/* Calculate texture layout information for stencil. */
 	if (surf->flags & RADEON_SURF_SBUFFER) {
-		AddrSurfInfoIn.bpp = 8;
-		AddrSurfInfoIn.flags.depth = 0;
 		AddrSurfInfoIn.flags.stencil = 1;
+		AddrSurfInfoIn.bpp = 8;
+
+		if (!AddrSurfInfoIn.flags.depth)
+			r = gfx9_get_preferred_swizzle_mode(addrlib, &AddrSurfInfoIn, false,
+							    &AddrSurfInfoIn.swizzleMode);
+		else
+			AddrSurfInfoIn.flags.depth = 0;
 
 		r = gfx9_compute_miptree(addrlib, surf, compressed, &AddrSurfInfoIn);
 		if (r)
-- 
2.9.3