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metal: add support for render-only devices

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This commit is contained in:
Julian Orth 2026-03-14 14:05:46 +01:00
parent 17e434ba34
commit 3d60cfc5dc
3 changed files with 78 additions and 57 deletions
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17
src/video/drm.rs
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@ -26,7 +26,8 @@ use {
get_version, mode_addfb2, mode_atomic, mode_create_blob, mode_destroy_blob,
mode_get_resources, mode_getconnector, mode_getencoder, mode_getplane,
mode_getplaneresources, mode_getprobblob, mode_getproperty, mode_obj_getproperties,
mode_rmfb, prime_fd_to_handle, queue_sequence, revoke_lease, set_client_cap,
mode_rmfb, mode_supports_get_resources, prime_fd_to_handle, queue_sequence,
revoke_lease, set_client_cap,
},
},
},
@ -339,6 +340,10 @@ impl DrmMaster {
mode_get_resources(self.raw())
}
pub fn supports_get_resources(&self) -> Result<bool, DrmError> {
mode_supports_get_resources(self.raw())
}
pub fn get_cap(&self, cap: u64) -> Result<u64, OsError> {
get_cap(self.raw(), cap)
}
@ -751,12 +756,12 @@ drm_obj!(DrmFb, DRM_MODE_OBJECT_FB);
drm_obj!(DrmBlob, DRM_MODE_OBJECT_BLOB);
drm_obj!(DrmPlane, DRM_MODE_OBJECT_PLANE);
#[derive(Debug)]
#[derive(Debug, Default)]
pub struct DrmCardResources {
pub min_width: u32,
pub max_width: u32,
pub min_height: u32,
pub max_height: u32,
pub _min_width: u32,
pub _max_width: u32,
pub _min_height: u32,
pub _max_height: u32,
pub _fbs: Vec<DrmFb>,
pub crtcs: Vec<DrmCrtc>,
pub connectors: Vec<DrmConnector>,

24
src/video/drm/sys.rs
View file

@ -17,7 +17,11 @@ use {
ffi::CString,
io::{BufRead, BufReader},
},
uapi::{OwnedFd, Pod, Ustring, c, pod_zeroed},
uapi::{
OwnedFd, Pod, Ustring,
c::{self, c_int},
pod_zeroed,
},
};
pub unsafe fn ioctl<T>(fd: c::c_int, request: c::c_ulong, t: &mut T) -> Result<c::c_int, OsError> {
@ -546,10 +550,10 @@ pub fn mode_get_resources(fd: c::c_int) -> Result<DrmCardResources, DrmError> {
}
Ok(DrmCardResources {
min_width: res.min_width,
max_width: res.max_width,
min_height: res.min_height,
max_height: res.max_height,
_min_width: res.min_width,
_max_width: res.max_width,
_min_height: res.min_height,
_max_height: res.max_height,
_fbs: fbs,
crtcs,
connectors,
@ -557,6 +561,16 @@ pub fn mode_get_resources(fd: c::c_int) -> Result<DrmCardResources, DrmError> {
})
}
pub fn mode_supports_get_resources(fd: c_int) -> Result<bool, DrmError> {
let mut res = drm_mode_card_res::default();
let res = unsafe { ioctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &mut res) };
match res {
Ok(_) => Ok(true),
Err(e) if e.0 == c::EOPNOTSUPP => Ok(false),
Err(e) => Err(DrmError::GetResources(e)),
}
}
#[repr(C)]
struct drm_mode_get_plane_res {
plane_id_ptr: u64,