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dmabuf: cache is_disjoint property

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This commit is contained in:
Julian Orth 2025-10-01 23:30:49 +02:00
parent f00202f149
commit 0884a5c656
9 changed files with 27 additions and 14 deletions
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31
src/video/dmabuf.rs
View file

@ -5,7 +5,7 @@ use {
video::{LINEAR_MODIFIER, Modifier},
},
arrayvec::ArrayVec,
std::{rc::Rc, sync::OnceLock},
std::{cell::OnceCell, rc::Rc, sync::OnceLock},
uapi::{
_IOW, _IOWR, OwnedFd,
c::{self, dev_t, ioctl},
@ -30,6 +30,7 @@ pub struct DmaBuf {
pub format: &'static Format,
pub modifier: Modifier,
pub planes: PlaneVec<DmaBufPlane>,
pub is_disjoint: OnceCell<bool>,
}
pub const MAX_PLANES: usize = 4;
@ -38,23 +39,25 @@ pub type PlaneVec<T> = ArrayVec<T, MAX_PLANES>;
impl DmaBuf {
pub fn is_disjoint(&self) -> bool {
if self.planes.len() <= 1 {
return false;
}
let stat = match uapi::fstat(self.planes[0].fd.raw()) {
Ok(s) => s,
_ => return true,
};
for plane in &self.planes[1..] {
let stat2 = match uapi::fstat(plane.fd.raw()) {
*self.is_disjoint.get_or_init(|| {
if self.planes.len() <= 1 {
return false;
}
let stat = match uapi::fstat(self.planes[0].fd.raw()) {
Ok(s) => s,
_ => return true,
};
if stat2.st_ino != stat.st_ino {
return true;
for plane in &self.planes[1..] {
let stat2 = match uapi::fstat(plane.fd.raw()) {
Ok(s) => s,
_ => return true,
};
if stat2.st_ino != stat.st_ino {
return true;
}
}
}
false
false
})
}
pub fn udmabuf_size(&self) -> Option<usize> {

1
src/video/gbm.rs
View file

@ -202,6 +202,7 @@ unsafe fn export_bo(dmabuf_ids: &DmaBufIds, bo: *mut Bo) -> Result<DmaBuf, GbmEr
}
planes
},
is_disjoint: Default::default(),
})
}
}