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Send SCANOUT flag in dmabuf feedback when target_node != render_node

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The Intel driver (at least) pads the stride to meet the requirements for
scanout on AMD or Nvidia cards, when this flag is set.

This works around the bug I've seen in the Nvidia driver with corruption
importing an unaligned dmabuf. This presumably is an issue in the Nvidia
driver, but presumably it the fix would be for the import to fail, so
using a stride that allows it to succeed is better anyway.
This commit is contained in:
Ian Douglas Scott 2023-08-11 08:34:08 -07:00
parent 1f3761a5da
commit 6b34edb077
1 changed files with 5 additions and 1 deletions
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6
src/backend/kms/mod.rs
View file

@ -1004,7 +1004,11 @@ fn get_surface_dmabuf_feedback(
let target_node = surface.device_fd().dev_id().unwrap();
let mut builder = DmabufFeedbackBuilder::new(render_node.dev_id(), render_formats);
if target_node != render_node.dev_id() && !combined_formats.is_empty() {
builder = builder.add_preference_tranche(target_node, None, combined_formats);
builder = builder.add_preference_tranche(
target_node,
Some(zwp_linux_dmabuf_feedback_v1::TrancheFlags::Scanout),
combined_formats,
);
};
let render_feedback = builder.clone().build().unwrap();