drivers/graphics: Require Debug to be implemented for Buffer

drivers/graphics/driver-graphics/src/lib.rs

@@ -77,7 +77,7 @@ pub trait GraphicsAdapter: Sized + Debug {
     fn handle_cursor(&mut self, cursor: Option<&CursorPlane<Self::Buffer>>, dirty_fb: bool);
 }
 
-pub trait Buffer {
+pub trait Buffer: Debug {
     fn width(&self) -> u32;
     fn height(&self) -> u32;
 }

drivers/graphics/ihdgd/src/device/scheme.rs

@@ -146,6 +146,7 @@ impl DeviceFb {
     }
 }
 
+#[derive(Debug)]
 pub struct DumbFb {
     width: usize,
     height: usize,

drivers/graphics/vesad/src/scheme.rs

@@ -179,6 +179,7 @@ impl FrameBuffer {
     }
 }
 
+#[derive(Debug)]
 pub struct GraphicScreen {
     width: usize,
     height: usize,

drivers/graphics/virtio-gpud/src/scheme.rs

@@ -42,6 +42,17 @@ pub struct VirtGpuFramebuffer<'a> {
     height: u32,
 }
 
+impl<'a> fmt::Debug for VirtGpuFramebuffer<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("VirtGpuFramebuffer")
+            .field("id", &self.id)
+            .field("sgl", &self.sgl)
+            .field("width", &self.width)
+            .field("height", &self.height)
+            .finish_non_exhaustive()
+    }
+}
+
 impl DrmBuffer for VirtGpuFramebuffer<'_> {
     fn width(&self) -> u32 {
         self.width