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drivers/graphics/ihdgd: Introduce DeviceFb::alloc

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This commit is contained in:
bjorn3
2026-03-21 13:24:13 +01:00
parent 56552cc6b3
commit afa6b64104
2 changed files with 25 additions and 20 deletions
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drivers/graphics/ihdgd/src/device/mod.rs
+1 -20
View File
@@ -719,26 +719,7 @@ impl Device {
let width = timing.horizontal_active_pixels as u32;
let height = timing.vertical_active_lines as u32;
//TODO: documentation on this is not great
let stride_16 = (width + 15) / 16;
let stride = stride_16 * 16;
//TODO: how is memory allocated for PLANE_SURF?
let surf_size = (stride * height * 4).next_multiple_of(4096);
let surf = self
.alloc_surfaces
.allocate_range(surf_size)
.map_err(|err| {
log::warn!(
"failed to allocate surface of size {}: {:?}",
surf_size,
err
);
Error::new(EIO)
})?;
let fb =
unsafe { DeviceFb::new(&self.gm, surf.start, width, height, stride, true) };
let fb = DeviceFb::alloc(&self.gm, &mut self.alloc_surfaces, width, height)?;
plane.modeset(&mut self.alloc_buffers)?;
plane.set_framebuffer(&fb);
drivers/graphics/ihdgd/src/device/pipe.rs
+24
View File
@@ -43,6 +43,30 @@ impl DeviceFb {
stride,
}
}
pub fn alloc(
gm: &MmioRegion,
alloc_surfaces: &mut RangeAllocator<u32>,
width: u32,
height: u32,
) -> syscall::Result<Self> {
//TODO: documentation on this is not great
let stride_16 = (width + 15) / 16;
let stride = stride_16 * 16;
//TODO: how is memory allocated for PLANE_SURF?
let surf_size = (stride * height * 4).next_multiple_of(4096);
let surf = alloc_surfaces.allocate_range(surf_size).map_err(|err| {
log::warn!(
"failed to allocate surface of size {}: {:?}",
surf_size,
err
);
Error::new(EIO)
})?;
Ok(unsafe { DeviceFb::new(gm, surf.start, width, height, stride, true) })
}
}
pub struct Plane {