panfrost: Support linear depth textures

This combination has not yet been seen "in the wild" in traces, but to
support linear depth FBOs, ~bruteforce reveals this bit pattern is
necessary. It's not yet clear why the meanings of 0x1 and 0x2 are
essentially flipped (tiled vs linear for colour, linear vs some sort of
tiled for depth).

Signed-off-by: Alyssa Rosenzweig <[email protected]>
Reviewed-by: Tomeu Vizoso <[email protected]>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gallium/drivers/panfrost/pan_context.c b/src/gallium/drivers/panfrost/pan_context.c
index 4c02fbbe125..9d89a8978ae 100644
--- a/src/gallium/drivers/panfrost/pan_context.c
+++ b/src/gallium/drivers/panfrost/pan_context.c
@@ -2266,17 +2266,19 @@ panfrost_create_sampler_view(
 
         enum mali_format format = panfrost_find_format(desc);
 
+        bool is_depth = desc->format == PIPE_FORMAT_Z32_UNORM;
+
         unsigned usage2_layout = 0x10;
 
         switch (prsrc->bo->layout) {
                 case PAN_AFBC:
-                        usage2_layout |= 0xc;
+                        usage2_layout |= 0x8 | 0x4;
                         break;
                 case PAN_TILED:
                         usage2_layout |= 0x1;
                         break;
                 case PAN_LINEAR:
-                        usage2_layout |= 0x2;
+                        usage2_layout |= is_depth ? 0x1 : 0x2;
                         break;
                 default:
                         assert(0);