drivers/graphics: Report DRM_CAP_DUMB_PREFERRED_DEPTH to clients

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

@@ -6,7 +6,8 @@ use driver_graphics::kms::objects::{
 };
 use driver_graphics::{Buffer, CursorPlane, Damage, GraphicsAdapter};
 use drm_sys::{
-    DRM_CAP_DUMB_BUFFER, DRM_CAP_DUMB_PREFER_SHADOW, DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT,
+    DRM_CAP_DUMB_BUFFER, DRM_CAP_DUMB_PREFERRED_DEPTH, DRM_CAP_DUMB_PREFER_SHADOW,
+    DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT,
 };
 use syscall::error::EINVAL;
 
@@ -50,6 +51,7 @@ impl GraphicsAdapter for Device {
     fn get_cap(&self, cap: u32) -> syscall::Result<u64> {
         match cap {
             DRM_CAP_DUMB_BUFFER => Ok(1),
+            DRM_CAP_DUMB_PREFERRED_DEPTH => Ok(24),
             DRM_CAP_DUMB_PREFER_SHADOW => Ok(1),
             _ => Err(syscall::Error::new(EINVAL)),
         }

drivers/graphics/vesad/src/scheme.rs

@@ -7,7 +7,8 @@ use driver_graphics::kms::connector::{KmsConnectorDriver, KmsConnectorStatus};
 use driver_graphics::kms::objects::{KmsCrtc, KmsCrtcState, KmsObjectId, KmsObjects};
 use driver_graphics::{Buffer, CursorPlane, Damage, GraphicsAdapter};
 use drm_sys::{
-    DRM_CAP_DUMB_BUFFER, DRM_CAP_DUMB_PREFER_SHADOW, DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT,
+    DRM_CAP_DUMB_BUFFER, DRM_CAP_DUMB_PREFERRED_DEPTH, DRM_CAP_DUMB_PREFER_SHADOW,
+    DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT,
 };
 use syscall::{EINVAL, PAGE_SIZE};
 
@@ -61,6 +62,7 @@ impl GraphicsAdapter for FbAdapter {
     fn get_cap(&self, cap: u32) -> syscall::Result<u64> {
         match cap {
             DRM_CAP_DUMB_BUFFER => Ok(1),
+            DRM_CAP_DUMB_PREFERRED_DEPTH => Ok(24),
             DRM_CAP_DUMB_PREFER_SHADOW => Ok(0),
             _ => Err(syscall::Error::new(EINVAL)),
         }

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

@@ -6,8 +6,8 @@ use driver_graphics::kms::connector::{KmsConnectorDriver, KmsConnectorStatus};
 use driver_graphics::kms::objects::{KmsCrtc, KmsCrtcState, KmsObjectId, KmsObjects};
 use driver_graphics::{Buffer as DrmBuffer, CursorPlane, Damage, GraphicsAdapter, GraphicsScheme};
 use drm_sys::{
-    DRM_CAP_CURSOR_HEIGHT, DRM_CAP_CURSOR_WIDTH, DRM_CAP_DUMB_BUFFER, DRM_CAP_DUMB_PREFER_SHADOW,
-    DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT,
+    DRM_CAP_CURSOR_HEIGHT, DRM_CAP_CURSOR_WIDTH, DRM_CAP_DUMB_BUFFER, DRM_CAP_DUMB_PREFERRED_DEPTH,
+    DRM_CAP_DUMB_PREFER_SHADOW, DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT,
 };
 
 use syscall::{EINVAL, PAGE_SIZE};
@@ -293,6 +293,7 @@ impl<'a> GraphicsAdapter for VirtGpuAdapter<'a> {
     fn get_cap(&self, cap: u32) -> syscall::Result<u64> {
         match cap {
             DRM_CAP_DUMB_BUFFER => Ok(1),
+            DRM_CAP_DUMB_PREFERRED_DEPTH => Ok(24),
             DRM_CAP_DUMB_PREFER_SHADOW => Ok(0),
             DRM_CAP_CURSOR_WIDTH => Ok(64),
             DRM_CAP_CURSOR_HEIGHT => Ok(64),