Update smithay, and adjust to use sync points from blit calls

Cargo.lock

@@ -4792,7 +4792,7 @@ checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 [[package]]
 name = "smithay"
 version = "0.7.0"
-source = "git+https://github.com/smithay/smithay.git?rev=ae1faae#ae1faaeb71e2664f4ddb3db7423a5ec746a6a51d"
+source = "git+https://github.com/smithay/smithay.git?rev=20d2dac#20d2dacd71394b5f96f6ace0a70a6f20dc62c0c6"
 dependencies = [
  "aliasable",
  "appendlist",

Cargo.toml

@@ -146,4 +146,4 @@ cosmic-protocols = { git = "https://github.com/pop-os//cosmic-protocols", branch
 cosmic-client-toolkit = { git = "https://github.com/pop-os//cosmic-protocols", branch = "main" }
 
 [patch.crates-io]
-smithay = { git = "https://github.com/smithay/smithay.git", rev = "ae1faae" }
+smithay = { git = "https://github.com/smithay/smithay.git", rev = "20d2dac" }

src/backend/kms/surface/mod.rs

@@ -1729,7 +1729,8 @@ fn send_screencopy_result<'a>(
 
             if let Some(fb) = fb.as_mut() {
                 for rect in adjusted.iter().copied() {
-                    renderer
+                    // TODO: On Vulkan, may need to combine sync points instead of just using latest?
+                    sync = renderer
                         .blit(&mut tex_fb, fb, rect, rect, TextureFilter::Linear)
                         .map_err(
                             RenderError::<<GlMultiRenderer as RendererSuper>::Error>::Rendering,

src/backend/render/mod.rs

@@ -1379,14 +1379,17 @@ where
                             elements.truncate(old_len);
                         }
 
+                        let mut sync = SyncPoint::default();
+
                         if let (Some(damage), _) = &res {
+                            // TODO: On Vulkan, may need to combine sync points instead of just using latest?
                             let blit_to_buffer =
                                 |renderer: &mut R, blit_from: &mut R::Framebuffer<'_>| {
                                     if let Ok(dmabuf) = get_dmabuf(buffer) {
                                         let mut dmabuf_clone = dmabuf.clone();
                                         let mut fb = renderer.bind(&mut dmabuf_clone)?;
                                         for rect in damage.iter() {
-                                            renderer.blit(
+                                            sync = renderer.blit(
                                                 blit_from,
                                                 &mut fb,
                                                 *rect,
@@ -1398,7 +1401,7 @@ where
                                         let fb = offscreen
                                             .expect("shm buffers should have offscreen target");
                                         for rect in damage.iter() {
-                                            renderer.blit(
+                                            sync = renderer.blit(
                                                 blit_from,
                                                 fb,
                                                 *rect,
@@ -1425,7 +1428,7 @@ where
 
                         Ok(RenderOutputResult {
                             damage: res.0,
-                            sync: SyncPoint::default(),
+                            sync,
                             states: res.1,
                         })
                     },