etnaviv: implicitly update shared texture resources

Implicitly update shared texture resources whenever they are first
used after the context has been flushed. This implements the
necessary behavior to get updated content for resources shared
outside of the screen without relying on any other API level
trigger, discussed to be necessary in [1].

[1] KhronosGroup/OpenGL-Registry#566

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/6220
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25756>

src/gallium/drivers/etnaviv/etnaviv_context.c

@@ -109,6 +109,9 @@ etna_context_destroy(struct pipe_context *pctx)
    if (ctx->pending_resources)
       _mesa_hash_table_destroy(ctx->pending_resources, NULL);
 
+   if (ctx->updated_resources)
+      _mesa_set_destroy(ctx->updated_resources, NULL);
+
    if (ctx->flush_resources)
       _mesa_set_destroy(ctx->flush_resources, NULL);
 
@@ -534,6 +537,13 @@ etna_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
          pipe_resource_reference(&prsc, NULL);
       }
       _mesa_set_clear(ctx->flush_resources, NULL);
+
+      /* reset shared resources update tracking */
+      set_foreach(ctx->updated_resources, entry) {
+         struct pipe_resource *prsc = (struct pipe_resource *)entry->key;
+         pipe_resource_reference(&prsc, NULL);
+      }
+      _mesa_set_clear(ctx->updated_resources, NULL);
    }
 
    etna_cmd_stream_flush(ctx->stream, ctx->in_fence_fd,
@@ -625,6 +635,11 @@ etna_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
    if (!ctx->flush_resources)
       goto fail;
 
+   ctx->updated_resources = _mesa_set_create(NULL, _mesa_hash_pointer,
+                                             _mesa_key_pointer_equal);
+   if (!ctx->updated_resources)
+      goto fail;
+
    /* context ctxate setup */
    ctx->screen = screen;
    /* need some sane default in case gallium frontends don't set some state: */

src/gallium/drivers/etnaviv/etnaviv_context.h

@@ -201,6 +201,8 @@ struct etna_context {
 
    /* resources that must be flushed implicitly at the context flush time */
    struct set *flush_resources;
+   /* resources that need to be updated after a context flush */
+   struct set *updated_resources;
 
    bool is_noop;
 

src/gallium/drivers/etnaviv/etnaviv_texture.c

@@ -165,6 +165,14 @@ etna_update_sampler_source(struct pipe_sampler_view *view, int num)
    struct etna_context *ctx = etna_context(view->context);
    bool enable_sampler_ts = false;
 
+   if (base->shared && !_mesa_set_search(ctx->updated_resources, view->texture)) {
+      for (int i = view->u.tex.first_level; i <= view->u.tex.last_level; i++)
+         etna_resource_level_mark_changed(&base->levels[i]);
+
+      pipe_reference(NULL, &view->texture->reference);
+      _mesa_set_add(ctx->updated_resources, view->texture);
+   }
+
    if (base->render && etna_resource_newer(etna_resource(base->render), base))
       from = etna_resource(base->render);