macbook: aquamarine immediate legacy cursor moves (patch file)

hosts/hardware/FredOS-Macbook.nix

@@ -54,17 +54,15 @@
 
   # wait_prepare/wait_finish were removed from struct vb2_ops in Linux 6.8
   nixpkgs.overlays = [
-    # Legacy DRM iface (AQ_NO_ATOMIC): every commit without cursor flags
-    # hits the else-branch and nulls the cursor plane → cursor vanishes
-    # whenever it isn't moving (vfr=false commits every frame). Only null
-    # it when the cursor is actually meant to be hidden. Bug present
-    # upstream as of aquamarine 0.11.0 / main (July 2026).
+    # Legacy DRM iface (AQ_NO_ATOMIC) cursor fixes, see patch:
+    # 1. moveCursor only scheduled a frame — cursor still waited for vblank.
+    #    Issue the immediate drmModeMoveCursor ioctl like wlroots did.
+    # 2. Commits without cursor flags nulled the cursor plane → cursor
+    #    vanished while idle. Only null when actually hidden.
+    # Both present upstream as of aquamarine 0.11.0 / main (July 2026).
     (final: prev: {
       aquamarine = prev.aquamarine.overrideAttrs (old: {
-        postPatch = (old.postPatch or "") + ''
-          sed -i 's|} else if (drmModeSetCursor(|} else if (!connector->output->cursorVisible \&\& drmModeSetCursor(|' \
-            src/backend/drm/impl/Legacy.cpp
-        '';
+        patches = (old.patches or [ ]) ++ [ ../../patches/aquamarine-legacy-cursor.patch ];
       });
     })
     (final: prev: {

patches/aquamarine-legacy-cursor.patch

@@ -0,0 +1,22 @@
+--- a/src/backend/drm/impl/Legacy.cpp
++++ b/src/backend/drm/impl/Legacy.cpp
+@@ -18,6 +18,10 @@
+     if (!connector->output->cursorVisible || !connector->output->state->state().enabled || !connector->crtc || !connector->crtc->cursor)
+         return true;
+ 
++    // move the cursor plane immediately via the legacy ioctl instead of
++    // waiting for the next vblank-bound commit
++    drmModeMoveCursor(connector->backend->gpu->fd, connector->crtc->id, (int)connector->output->cursorPos.x, (int)connector->output->cursorPos.y);
++
+     if (!skipSchedule)
+         connector->output->scheduleFrame(IOutput::AQ_SCHEDULE_CURSOR_MOVE);
+ 
+@@ -123,7 +127,7 @@
+             connector->backend->backend->log(AQ_LOG_ERROR, std::format("legacy drm: cursor drmIoctl failed: {}", strerror(errno)));
+             return false;
+         }
+-    } else if (drmModeSetCursor(connector->backend->gpu->fd, connector->crtc->id, 0, 0, 0))
++    } else if (!connector->output->cursorVisible && drmModeSetCursor(connector->backend->gpu->fd, connector->crtc->id, 0, 0, 0))
+         connector->backend->backend->log(AQ_LOG_ERROR, "legacy drm: cursor null failed");
+ 
+     if (!enable)