diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/tty.rs | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/src/backend/tty.rs b/src/backend/tty.rs index 4373eebe..9c7bda21 100644 --- a/src/backend/tty.rs +++ b/src/backend/tty.rs @@ -8,7 +8,7 @@ use std::sync::{Arc, Mutex}; use std::time::Duration; use std::{io, mem}; -use anyhow::{anyhow, Context}; +use anyhow::{anyhow, bail, Context}; use libc::dev_t; use niri_config::Config; use smithay::backend::allocator::dmabuf::Dmabuf; @@ -694,6 +694,12 @@ impl Tty { } debug!("picking mode: {mode:?}"); + // We only use 8888 RGB formats, so set max bpc to 8 to allow more types of links to run. + match set_max_bpc(&device.drm, connector.handle(), 8) { + Ok(bpc) => debug!("set max bpc to {bpc}"), + Err(err) => debug!("error setting max bpc: {err:?}"), + } + let surface = device .drm .create_surface(crtc, mode, &[connector.handle()])?; @@ -1768,6 +1774,41 @@ fn get_edid_info(device: &DrmDevice, connector: connector::Handle) -> Option<Edi } } +fn set_max_bpc(device: &DrmDevice, connector: connector::Handle, bpc: u64) -> anyhow::Result<u64> { + let props = device + .get_properties(connector) + .context("error getting properties")?; + for (prop, value) in props { + let info = device + .get_property(prop) + .context("error getting property")?; + if info.name().to_str() != Ok("max bpc") { + continue; + } + + let property::ValueType::UnsignedRange(min, max) = info.value_type() else { + bail!("wrong property type") + }; + + let bpc = bpc.clamp(min, max); + + let property::Value::UnsignedRange(value) = info.value_type().convert_value(value) else { + bail!("wrong property type") + }; + if value == bpc { + return Ok(bpc); + } + + device + .set_property(connector, prop, property::Value::UnsignedRange(bpc).into()) + .context("error setting property")?; + + return Ok(bpc); + } + + Err(anyhow!("couldn't find max bpc property")) +} + #[cfg(test)] mod tests { use super::*; |