719 lines
25 KiB
Rust
719 lines
25 KiB
Rust
use {
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crate::{
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backend::Connector,
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backends::metal::{
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video::{
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MetalConnector, MetalCrtc, MetalHardwareCursorChange, MetalPlane, RenderBuffer,
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},
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MetalError,
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},
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gfx_api::{
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create_render_pass, AcquireSync, BufferResv, GfxApiOpt, GfxRenderPass, GfxTexture,
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SyncFile,
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},
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theme::Color,
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tree::OutputNode,
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utils::{errorfmt::ErrorFmt, oserror::OsError, transform_ext::TransformExt},
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video::{
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dmabuf::DmaBufId,
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drm::{
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DrmError, DrmFramebuffer, DRM_MODE_ATOMIC_NONBLOCK, DRM_MODE_PAGE_FLIP_ASYNC,
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DRM_MODE_PAGE_FLIP_EVENT,
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},
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},
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},
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std::rc::{Rc, Weak},
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uapi::c,
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};
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struct Latched {
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pass: GfxRenderPass,
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damage: u64,
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}
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#[derive(Debug)]
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pub struct DirectScanoutCache {
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tex: Weak<dyn GfxTexture>,
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fb: Option<Rc<DrmFramebuffer>>,
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}
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#[derive(Debug)]
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pub struct DirectScanoutData {
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tex: Rc<dyn GfxTexture>,
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acquire_sync: AcquireSync,
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_resv: Option<Rc<dyn BufferResv>>,
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fb: Rc<DrmFramebuffer>,
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dma_buf_id: DmaBufId,
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position: DirectScanoutPosition,
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}
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#[derive(Debug)]
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pub struct DirectScanoutPosition {
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pub src_width: i32,
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pub src_height: i32,
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pub crtc_x: i32,
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pub crtc_y: i32,
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pub crtc_width: i32,
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pub crtc_height: i32,
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}
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pub struct PresentFb {
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fb: Rc<DrmFramebuffer>,
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tex: Rc<dyn GfxTexture>,
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direct_scanout_data: Option<DirectScanoutData>,
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sync_file: Option<SyncFile>,
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}
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enum CursorProgramming {
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Enable {
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plane: Rc<MetalPlane>,
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fb: Rc<DrmFramebuffer>,
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x: i32,
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y: i32,
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width: i32,
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height: i32,
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swap: bool,
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},
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Disable {
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plane: Rc<MetalPlane>,
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},
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}
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impl MetalConnector {
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pub fn schedule_present(&self) {
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self.present_trigger.trigger();
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}
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pub async fn present_loop(self: Rc<Self>) {
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loop {
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self.present_trigger.triggered().await;
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if let Err(e) = self.present_once().await {
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log::error!("Could not present: {}", ErrorFmt(e));
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continue;
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}
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self.state.set_backend_idle(false);
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}
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}
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async fn present_once(&self) -> Result<(), MetalError> {
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let version = self.version.get();
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if !self.can_present.get() {
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return Ok(());
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}
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if !self.backend.check_render_context(&self.dev) {
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return Ok(());
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}
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let Some(node) = self.state.root.outputs.get(&self.connector_id) else {
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return Ok(());
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};
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let crtc = match self.crtc.get() {
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Some(crtc) => crtc,
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_ => return Ok(()),
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};
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if !crtc.active.value.get() {
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return Ok(());
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}
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let plane = match self.primary_plane.get() {
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Some(p) => p,
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_ => return Ok(()),
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};
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let buffers = match self.buffers.get() {
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Some(b) => b,
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_ => return Ok(()),
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};
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self.latch_cursor(&node)?;
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let cursor_programming = self.compute_cursor_programming();
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let latched = self.latch(&node);
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node.schedule.latched();
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if cursor_programming.is_none() && latched.is_none() {
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return Ok(());
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}
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let buffer = &buffers[self.next_buffer.get() % buffers.len()];
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let mut present_fb = None;
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let mut direct_scanout_id = None;
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if let Some(latched) = &latched {
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let fb = self.prepare_present_fb(buffer, &plane, &latched.pass, true)?;
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direct_scanout_id = fb.direct_scanout_data.as_ref().map(|d| d.dma_buf_id);
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present_fb = Some(fb);
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}
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self.perform_screencopies(&present_fb, &node);
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if let Some(sync_file) = self.cursor_sync_file.take() {
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if let Err(e) = self.state.ring.readable(&sync_file).await {
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log::error!(
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"Could not wait for cursor sync file to complete: {}",
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ErrorFmt(e)
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);
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}
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}
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self.await_present_fb(present_fb.as_mut()).await;
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let mut res = self.program_connector(
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version,
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&crtc,
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&plane,
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cursor_programming.as_ref(),
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present_fb.as_ref(),
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);
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if res.is_err() {
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if let Some(dsd_id) = direct_scanout_id {
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let fb = self.prepare_present_fb(
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buffer,
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&plane,
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&latched.as_ref().unwrap().pass,
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false,
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)?;
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present_fb = Some(fb);
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self.await_present_fb(present_fb.as_mut()).await;
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res = self.program_connector(
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version,
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&crtc,
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&plane,
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cursor_programming.as_ref(),
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present_fb.as_ref(),
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);
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if res.is_ok() {
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let mut cache = self.scanout_buffers.borrow_mut();
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if let Some(buffer) = cache.remove(&dsd_id) {
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cache.insert(
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dsd_id,
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DirectScanoutCache {
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tex: buffer.tex,
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fb: None,
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},
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);
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}
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}
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}
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}
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if let Err(e) = res {
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self.render_result
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.borrow_mut()
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.discard_presentation_feedback();
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if let MetalError::Commit(DrmError::Atomic(OsError(c::EACCES))) = e {
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log::debug!("Could not perform atomic commit, likely because we're no longer the DRM master");
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return Ok(());
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}
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Err(e)
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} else {
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macro_rules! apply_change {
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($prop:expr) => {
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if let Some(v) = $prop.pending_value.take() {
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$prop.value.set(v);
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}
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};
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}
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apply_change!(plane.src_w);
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apply_change!(plane.src_h);
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apply_change!(plane.crtc_x);
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apply_change!(plane.crtc_y);
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apply_change!(plane.crtc_w);
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apply_change!(plane.crtc_h);
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if let Some(fb) = present_fb {
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if fb.direct_scanout_data.is_none() {
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self.next_buffer.fetch_add(1);
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}
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self.next_framebuffer.set(Some(fb));
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}
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if let Some(CursorProgramming::Enable { swap: true, .. }) = cursor_programming {
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self.cursor_swap_buffer.set(false);
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self.cursor_front_buffer.fetch_add(1);
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}
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self.can_present.set(false);
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if let Some(latched) = latched {
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self.has_damage.fetch_sub(latched.damage);
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}
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self.cursor_changed.set(false);
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Ok(())
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}
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}
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async fn await_present_fb(&self, new_fb: Option<&mut PresentFb>) {
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let Some(fb) = new_fb else {
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return;
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};
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let Some(sync_file) = fb.sync_file.take() else {
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return;
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};
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if let Err(e) = self.state.ring.readable(&sync_file).await {
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log::error!(
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"Could not wait for primary sync file to complete: {}",
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ErrorFmt(e)
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);
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}
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}
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fn program_connector(
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&self,
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version: u64,
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crtc: &Rc<MetalCrtc>,
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plane: &Rc<MetalPlane>,
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cursor: Option<&CursorProgramming>,
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new_fb: Option<&PresentFb>,
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) -> Result<(), MetalError> {
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let mut changes = self.master.change();
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let mut try_async_flip = self.tearing_requested.get() && self.dev.supports_async_commit;
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macro_rules! change {
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($c:expr, $prop:expr, $new:expr) => {{
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if $prop.value.get() != $new {
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$c.change($prop.id, $new as u64);
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try_async_flip = false;
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$prop.pending_value.set(Some($new));
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}
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}};
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}
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if let Some(fb) = new_fb {
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let (crtc_x, crtc_y, crtc_w, crtc_h, src_width, src_height) =
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match &fb.direct_scanout_data {
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None => {
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let plane_w = plane.mode_w.get();
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let plane_h = plane.mode_h.get();
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(0, 0, plane_w, plane_h, plane_w, plane_h)
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}
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Some(dsd) => {
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let p = &dsd.position;
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(
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p.crtc_x,
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p.crtc_y,
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p.crtc_width,
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p.crtc_height,
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p.src_width,
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p.src_height,
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)
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}
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};
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changes.change_object(plane.id, |c| {
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c.change(plane.fb_id, fb.fb.id().0 as _);
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change!(c, plane.src_w, (src_width as u32) << 16);
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change!(c, plane.src_h, (src_height as u32) << 16);
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change!(c, plane.crtc_x, crtc_x);
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change!(c, plane.crtc_y, crtc_y);
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change!(c, plane.crtc_w, crtc_w);
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change!(c, plane.crtc_h, crtc_h);
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if !try_async_flip && !self.dev.is_nvidia {
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if let Some(sf) = self.backend.signaled_sync_file.get() {
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c.change(plane.in_fence_fd, sf.0.raw() as u64);
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}
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}
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});
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} else {
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if self.dev.is_amd && crtc.vrr_enabled.value.get() {
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// Work around https://gitlab.freedesktop.org/drm/amd/-/issues/2186
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if let Some(fb) = &*self.active_framebuffer.borrow() {
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changes.change_object(plane.id, |c| {
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c.change(plane.fb_id, fb.fb.id().0 as _);
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});
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}
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}
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}
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if let Some(cursor) = cursor {
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try_async_flip = false;
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match cursor {
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CursorProgramming::Enable {
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plane,
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fb,
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x,
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y,
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width,
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height,
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..
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} => {
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changes.change_object(plane.id, |c| {
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c.change(plane.fb_id, fb.id().0 as _);
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c.change(plane.crtc_id.id, crtc.id.0 as _);
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c.change(plane.crtc_x.id, *x as _);
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c.change(plane.crtc_y.id, *y as _);
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c.change(plane.crtc_w.id, *width as _);
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c.change(plane.crtc_h.id, *height as _);
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c.change(plane.src_x.id, 0);
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c.change(plane.src_y.id, 0);
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c.change(plane.src_w.id, (*width as u64) << 16);
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c.change(plane.src_h.id, (*height as u64) << 16);
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if !self.dev.is_nvidia {
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if let Some(sf) = self.backend.signaled_sync_file.get() {
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c.change(plane.in_fence_fd, sf.0.raw() as u64);
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}
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}
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});
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}
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CursorProgramming::Disable { plane } => {
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changes.change_object(plane.id, |c| {
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c.change(plane.fb_id, 0);
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c.change(plane.crtc_id.id, 0);
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});
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}
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}
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}
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if version != self.version.get() {
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return Err(MetalError::OutOfDate);
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}
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let mut res;
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'commit: {
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const FLAGS: u32 = DRM_MODE_ATOMIC_NONBLOCK | DRM_MODE_PAGE_FLIP_EVENT;
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if try_async_flip {
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res = changes.commit(FLAGS | DRM_MODE_PAGE_FLIP_ASYNC, 0);
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if res.is_ok() {
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break 'commit;
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}
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}
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res = changes.commit(FLAGS, 0);
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}
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res.map_err(MetalError::Commit)
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}
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fn latch_cursor(&self, node: &Rc<OutputNode>) -> Result<(), MetalError> {
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if !self.cursor_damage.take() {
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return Ok(());
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}
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if self.cursor_plane.is_none() {
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return Ok(());
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}
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let buffers = self.cursor_buffers.get().unwrap();
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let mut c = MetalHardwareCursorChange {
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cursor_enabled: self.cursor_enabled.get(),
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cursor_swap_buffer: false,
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cursor_x: self.cursor_x.get(),
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cursor_y: self.cursor_y.get(),
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cursor_buffer: &buffers[(self.cursor_front_buffer.get() + 1) % buffers.len()],
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sync_file: None,
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cursor_size: (self.dev.cursor_width as _, self.dev.cursor_height as _),
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};
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self.state.present_hardware_cursor(node, &mut c);
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if c.cursor_swap_buffer {
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c.sync_file = c.cursor_buffer.copy_to_dev(c.sync_file)?;
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}
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self.cursor_swap_buffer.set(c.cursor_swap_buffer);
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if c.sync_file.is_some() {
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self.cursor_sync_file.set(c.sync_file);
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}
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let mut cursor_changed = false;
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cursor_changed |= self.cursor_enabled.replace(c.cursor_enabled) != c.cursor_enabled;
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cursor_changed |= c.cursor_swap_buffer;
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cursor_changed |= self.cursor_x.replace(c.cursor_x) != c.cursor_x;
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cursor_changed |= self.cursor_y.replace(c.cursor_y) != c.cursor_y;
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if cursor_changed {
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self.cursor_changed.set(true);
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}
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Ok(())
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}
|
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|
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fn compute_cursor_programming(&self) -> Option<CursorProgramming> {
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if !self.cursor_changed.get() {
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return None;
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}
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let plane = self.cursor_plane.get()?;
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let programming = if self.cursor_enabled.get() {
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let swap = self.cursor_swap_buffer.get();
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let mut front_buffer = self.cursor_front_buffer.get();
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if swap {
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front_buffer = front_buffer.wrapping_add(1);
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}
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let buffers = self.cursor_buffers.get().unwrap();
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let buffer = &buffers[front_buffer % buffers.len()];
|
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let (width, height) = buffer.dev_fb.physical_size();
|
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CursorProgramming::Enable {
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plane,
|
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fb: buffer.drm.clone(),
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x: self.cursor_x.get(),
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y: self.cursor_y.get(),
|
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width,
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height,
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swap,
|
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}
|
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} else {
|
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CursorProgramming::Disable { plane }
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};
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Some(programming)
|
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}
|
|
|
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fn latch(&self, node: &Rc<OutputNode>) -> Option<Latched> {
|
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let damage = self.has_damage.get();
|
|
if damage == 0 {
|
|
return None;
|
|
}
|
|
let mut rr = self.render_result.borrow_mut();
|
|
rr.output_id = node.id;
|
|
let render_hw_cursor = !self.cursor_enabled.get();
|
|
let mode = node.global.mode.get();
|
|
let pass = create_render_pass(
|
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(mode.width, mode.height),
|
|
&**node,
|
|
&self.state,
|
|
Some(node.global.pos.get()),
|
|
Some(&mut rr),
|
|
node.global.persistent.scale.get(),
|
|
true,
|
|
render_hw_cursor,
|
|
node.has_fullscreen(),
|
|
node.global.persistent.transform.get(),
|
|
Some(&self.state.damage_visualizer),
|
|
);
|
|
rr.dispatch_frame_requests(self.state.now_msec());
|
|
Some(Latched { pass, damage })
|
|
}
|
|
|
|
fn trim_scanout_cache(&self) {
|
|
self.scanout_buffers
|
|
.borrow_mut()
|
|
.retain(|_, buffer| buffer.tex.strong_count() > 0);
|
|
}
|
|
|
|
fn prepare_direct_scanout(
|
|
&self,
|
|
pass: &GfxRenderPass,
|
|
plane: &Rc<MetalPlane>,
|
|
) -> Option<DirectScanoutData> {
|
|
let ct = 'ct: {
|
|
let mut ops = pass.ops.iter().rev();
|
|
let ct = 'ct2: {
|
|
for opt in &mut ops {
|
|
match opt {
|
|
GfxApiOpt::Sync => {}
|
|
GfxApiOpt::FillRect(_) => {
|
|
// Top-most layer must be a texture.
|
|
return None;
|
|
}
|
|
GfxApiOpt::CopyTexture(ct) => break 'ct2 ct,
|
|
}
|
|
}
|
|
return None;
|
|
};
|
|
if ct.alpha.is_some() {
|
|
// Direct scanout with alpha factor is not supported.
|
|
return None;
|
|
}
|
|
if !ct.tex.format().has_alpha && ct.target.is_covering() {
|
|
// Texture covers the entire screen and is opaque.
|
|
break 'ct ct;
|
|
}
|
|
for opt in ops {
|
|
match opt {
|
|
GfxApiOpt::Sync => {}
|
|
GfxApiOpt::FillRect(fr) => {
|
|
if fr.color == Color::SOLID_BLACK {
|
|
// Black fills can be ignored because this is the CRTC background color.
|
|
if fr.rect.is_covering() {
|
|
// If fill covers the entire screen, we don't have to look further.
|
|
break 'ct ct;
|
|
}
|
|
} else {
|
|
// Fill could be visible.
|
|
return None;
|
|
}
|
|
}
|
|
GfxApiOpt::CopyTexture(_) => {
|
|
// Texture could be visible.
|
|
return None;
|
|
}
|
|
}
|
|
}
|
|
if let Some(clear) = pass.clear {
|
|
if clear != Color::SOLID_BLACK {
|
|
// Background could be visible.
|
|
return None;
|
|
}
|
|
}
|
|
ct
|
|
};
|
|
if let AcquireSync::None | AcquireSync::Implicit = ct.acquire_sync {
|
|
// Cannot perform scanout without explicit sync.
|
|
return None;
|
|
}
|
|
if ct.source.buffer_transform != ct.target.output_transform {
|
|
// Rotations and mirroring are not supported.
|
|
return None;
|
|
}
|
|
if !ct.source.is_covering() {
|
|
// Viewports are not supported.
|
|
return None;
|
|
}
|
|
if ct.target.x1 < -1.0 || ct.target.y1 < -1.0 || ct.target.x2 > 1.0 || ct.target.y2 > 1.0 {
|
|
// Rendering outside the screen is not supported.
|
|
return None;
|
|
}
|
|
let (tex_w, tex_h) = ct.tex.size();
|
|
let (x1, x2, y1, y2) = {
|
|
let plane_w = plane.mode_w.get() as f32;
|
|
let plane_h = plane.mode_h.get() as f32;
|
|
let ((x1, x2), (y1, y2)) = ct
|
|
.target
|
|
.output_transform
|
|
.maybe_swap(((ct.target.x1, ct.target.x2), (ct.target.y1, ct.target.y2)));
|
|
(
|
|
(x1 + 1.0) * plane_w / 2.0,
|
|
(x2 + 1.0) * plane_w / 2.0,
|
|
(y1 + 1.0) * plane_h / 2.0,
|
|
(y2 + 1.0) * plane_h / 2.0,
|
|
)
|
|
};
|
|
let (crtc_w, crtc_h) = (x2 - x1, y2 - y1);
|
|
if crtc_w < 0.0 || crtc_h < 0.0 {
|
|
// Flipping x or y axis is not supported.
|
|
return None;
|
|
}
|
|
if self.cursor_enabled.get() && (tex_w as f32, tex_h as f32) != (crtc_w, crtc_h) {
|
|
// If hardware cursors are used, we cannot scale the texture.
|
|
return None;
|
|
}
|
|
let Some(dmabuf) = ct.tex.dmabuf() else {
|
|
// Shm buffers cannot be scanned out.
|
|
return None;
|
|
};
|
|
let position = DirectScanoutPosition {
|
|
src_width: tex_w,
|
|
src_height: tex_h,
|
|
crtc_x: x1 as _,
|
|
crtc_y: y1 as _,
|
|
crtc_width: crtc_w as _,
|
|
crtc_height: crtc_h as _,
|
|
};
|
|
let mut cache = self.scanout_buffers.borrow_mut();
|
|
if let Some(buffer) = cache.get(&dmabuf.id) {
|
|
return buffer.fb.as_ref().map(|fb| DirectScanoutData {
|
|
tex: buffer.tex.upgrade().unwrap(),
|
|
acquire_sync: ct.acquire_sync.clone(),
|
|
_resv: ct.buffer_resv.clone(),
|
|
fb: fb.clone(),
|
|
dma_buf_id: dmabuf.id,
|
|
position,
|
|
});
|
|
}
|
|
let format = 'format: {
|
|
if let Some(f) = plane.formats.get(&dmabuf.format.drm) {
|
|
break 'format f;
|
|
}
|
|
// Try opaque format if possible.
|
|
if let Some(opaque) = dmabuf.format.opaque {
|
|
if let Some(f) = plane.formats.get(&opaque.drm) {
|
|
break 'format f;
|
|
}
|
|
}
|
|
return None;
|
|
};
|
|
if !format.modifiers.contains(&dmabuf.modifier) {
|
|
return None;
|
|
}
|
|
let data = match self.dev.master.add_fb(dmabuf, Some(format.format)) {
|
|
Ok(fb) => Some(DirectScanoutData {
|
|
tex: ct.tex.clone(),
|
|
acquire_sync: ct.acquire_sync.clone(),
|
|
_resv: ct.buffer_resv.clone(),
|
|
fb: Rc::new(fb),
|
|
dma_buf_id: dmabuf.id,
|
|
position,
|
|
}),
|
|
Err(e) => {
|
|
log::debug!(
|
|
"Could not import dmabuf for direct scanout: {}",
|
|
ErrorFmt(e)
|
|
);
|
|
None
|
|
}
|
|
};
|
|
cache.insert(
|
|
dmabuf.id,
|
|
DirectScanoutCache {
|
|
tex: Rc::downgrade(&ct.tex),
|
|
fb: data.as_ref().map(|dsd| dsd.fb.clone()),
|
|
},
|
|
);
|
|
data
|
|
}
|
|
|
|
fn direct_scanout_enabled(&self) -> bool {
|
|
self.dev
|
|
.direct_scanout_enabled
|
|
.get()
|
|
.unwrap_or(self.state.direct_scanout_enabled.get())
|
|
}
|
|
|
|
fn prepare_present_fb(
|
|
&self,
|
|
buffer: &RenderBuffer,
|
|
plane: &Rc<MetalPlane>,
|
|
pass: &GfxRenderPass,
|
|
try_direct_scanout: bool,
|
|
) -> Result<PresentFb, MetalError> {
|
|
self.trim_scanout_cache();
|
|
let try_direct_scanout = try_direct_scanout
|
|
&& self.direct_scanout_enabled()
|
|
// at least on AMD, using a FB on a different device for rendering will fail
|
|
// and destroy the render context. it's possible to work around this by waiting
|
|
// until the FB is no longer being scanned out, but if a notification pops up
|
|
// then we must be able to disable direct scanout immediately.
|
|
// https://gitlab.freedesktop.org/drm/amd/-/issues/3186
|
|
&& self.dev.is_render_device();
|
|
let mut direct_scanout_data = None;
|
|
if try_direct_scanout {
|
|
direct_scanout_data = self.prepare_direct_scanout(&pass, plane);
|
|
}
|
|
let direct_scanout_active = direct_scanout_data.is_some();
|
|
if self.direct_scanout_active.replace(direct_scanout_active) != direct_scanout_active {
|
|
let change = match direct_scanout_active {
|
|
true => "Enabling",
|
|
false => "Disabling",
|
|
};
|
|
log::debug!("{} direct scanout on {}", change, self.kernel_id());
|
|
}
|
|
let sync_file;
|
|
let fb;
|
|
let tex;
|
|
match &direct_scanout_data {
|
|
None => {
|
|
let sf = buffer
|
|
.render_fb()
|
|
.perform_render_pass(pass)
|
|
.map_err(MetalError::RenderFrame)?;
|
|
sync_file = buffer.copy_to_dev(sf)?;
|
|
fb = buffer.drm.clone();
|
|
tex = buffer.render_tex.clone();
|
|
}
|
|
Some(dsd) => {
|
|
sync_file = match &dsd.acquire_sync {
|
|
AcquireSync::None => None,
|
|
AcquireSync::Implicit => None,
|
|
AcquireSync::SyncFile { sync_file } => Some(sync_file.clone()),
|
|
AcquireSync::Unnecessary => None,
|
|
};
|
|
fb = dsd.fb.clone();
|
|
tex = dsd.tex.clone();
|
|
}
|
|
};
|
|
Ok(PresentFb {
|
|
fb,
|
|
tex,
|
|
direct_scanout_data,
|
|
sync_file,
|
|
})
|
|
}
|
|
|
|
fn perform_screencopies(&self, new_fb: &Option<PresentFb>, output: &OutputNode) {
|
|
let active_fb;
|
|
let fb = match &new_fb {
|
|
Some(f) => f,
|
|
None => {
|
|
active_fb = self.active_framebuffer.borrow();
|
|
match &*active_fb {
|
|
None => return,
|
|
Some(f) => f,
|
|
}
|
|
}
|
|
};
|
|
let render_hardware_cursor = self.cursor_enabled.get();
|
|
match &fb.direct_scanout_data {
|
|
None => {
|
|
output.perform_screencopies(&fb.tex, render_hardware_cursor, 0, 0, None);
|
|
}
|
|
Some(dsd) => {
|
|
output.perform_screencopies(
|
|
&dsd.tex,
|
|
render_hardware_cursor,
|
|
dsd.position.crtc_x,
|
|
dsd.position.crtc_y,
|
|
Some((dsd.position.crtc_width, dsd.position.crtc_height)),
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|