freedreno/a6xx: Add LRZ perf warn for ztest direction changes

Add a perf warning when LRZ invalidate happens due to depth test
direction reversal.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20708>

src/gallium/drivers/freedreno/a6xx/fd6_emit.c

@@ -186,6 +186,10 @@ compute_lrz_state(struct fd6_emit *emit) assert_dt
     */
    if (zsa->base.depth_enabled && (rsc->lrz_direction != FD_LRZ_UNKNOWN) &&
        (rsc->lrz_direction != lrz.direction)) {
+      if (!zsa->perf_warn_zdir && rsc->lrz_valid) {
+         perf_debug_ctx(ctx, "Invalidating LRZ due to depth test direction change");
+         zsa->perf_warn_zdir = true;
+      }
       rsc->lrz_valid = false;
    }
 

src/gallium/drivers/freedreno/a6xx/fd6_zsa.h

@@ -48,9 +48,15 @@ struct fd6_zsa_stateobj {
    uint32_t rb_stencilwrmask;
 
    struct fd6_lrz_state lrz;
-   bool writes_zs; /* writes depth and/or stencil */
-   bool invalidate_lrz;
-   bool alpha_test;
+   bool writes_zs : 1; /* writes depth and/or stencil */
+   bool invalidate_lrz : 1;
+   bool alpha_test : 1;
+
+   /* Track whether we've alread generated perf warns so that
+    * we don't flood the user with LRZ disable warns which can
+    * only be detected at draw time.
+    */
+   bool perf_warn_zdir : 1;
 
    struct fd_ringbuffer *stateobj[4];
 };