iris: Allow HiZ on blit sources

Ever since 95cc5438ebf, BLORP has been able to read from HiZ-compressed
depth buffers as long as the sampler supports HiZ.  This just makes iris
stop doing the unneeded resolve.

Closes: #2583
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3717>

diff --git a/src/gallium/drivers/iris/iris_blit.c b/src/gallium/drivers/iris/iris_blit.c
index 20b7340638345c1e1f83f7ee1fca9ec31cddfde8..10a157b3ef45d477496845cb28955150d6f46551 100644 (file)
--- a/src/gallium/drivers/iris/iris_blit.c
+++ b/src/gallium/drivers/iris/iris_blit.c
@@ -355,7 +355,7 @@ iris_blit(struct pipe_context *ctx, const struct pipe_blit_info *info)
       iris_resource_texture_aux_usage(ice, src_res, src_fmt.fmt);
 
    if (iris_resource_level_has_hiz(src_res, info->src.level))
-      src_aux_usage = ISL_AUX_USAGE_NONE;
+      assert(src_res->surf.format == src_fmt.fmt);
 
    bool src_clear_supported = isl_aux_usage_has_fast_clears(src_aux_usage) &&
                               src_res->surf.format == src_fmt.fmt;