panfrost: Increase tiler_heap max allocation to 64MB

We previously allocated only 16MB, but this isn't always enough. Now
that we have growable (heap) on recent kernels, there's not much reason
to try to shrink this allocation.

Fixes OUT_OF_MEMORY fault on furmark trace.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10938>
(cherry picked from commit ac1ee2bebe)

.pick_status.json

@@ -1390,7 +1390,7 @@
         "description": "panfrost: Increase tiler_heap max allocation to 64MB",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null
     },

src/gallium/drivers/panfrost/ci/traces-panfrost.yml

@@ -41,7 +41,7 @@ traces:
   - path: gputest/furmark.trace
     expectations:
       - device: gl-panfrost-t860
-        checksum: dc4ece101ed145228840d1f0654118c6
+        checksum: 2bde9efdddd92c28d29f744e36a226e9
   - path: gputest/triangle.trace
     expectations:
       - device: gl-panfrost-t860

src/panfrost/lib/pan_props.c

@@ -257,7 +257,7 @@ panfrost_open_device(void *memctx, int fd, struct panfrost_device *dev)
          * active for a single job chain at once, so a single heap can be
          * shared across batches/contextes */
 
-        dev->tiler_heap = panfrost_bo_create(dev, 4096 * 4096,
+        dev->tiler_heap = panfrost_bo_create(dev, 64 * 1024 * 1024,
                         PAN_BO_INVISIBLE | PAN_BO_GROWABLE);
 
         pthread_mutex_init(&dev->submit_lock, NULL);