graphics/graphics-ipc: Update handle doc comments

graphics/graphics-ipc/src/v1.rs

@@ -11,6 +11,8 @@ pub use crate::common::DisplayMap;
 ///
 /// The v1 graphics API only allows a single framebuffer for each VT, requires each display to be
 /// handled separately and doesn't support page flipping.
+///
+/// This API is stable. No breaking changes are allowed to be made without a version bump.
 pub struct V1GraphicsHandle {
     file: File,
 }

graphics/graphics-ipc/src/v2.rs

@@ -33,10 +33,13 @@ unsafe fn sys_call<T>(
     ))
 }
 
-/// A graphics handle using the (currently unstable) v2 graphics API.
+/// A graphics handle using the v2 graphics API.
 ///
 /// The v2 graphics API allows creating framebuffers on the fly, using them for page flipping and
 /// handles all displays using a single fd.
+///
+/// This API is not yet stable. Do not depend on it outside of the drivers repo until it has been
+/// stabilized.
 pub struct V2GraphicsHandle {
     file: File,
 }