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// Copyright 2020 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//! `max98390d` crate implements the required initialization workflows.
//! It currently supports boot time calibration for amplifiers.
#![deny(missing_docs)]
mod amp_calibration;
mod datastore;
mod error;
mod settings;
mod vpd;
use std::path::Path;
use cros_alsa::Card;
use sys_util::error;
use crate::amp_calibration::{AmpCalibration, VolumeMode};
use crate::error::{Error, Result};
use crate::settings::DeviceSettings;
/// Performs max98390d boot time calibration.
///
///
/// # Arguments
///
/// * `snd_card` - The sound card name, ex: sofcmlmax98390d.
/// * `conf` - The `DeviceSettings` in yaml format.
///
/// # Errors
///
/// If any amplifiers fail to complete the calibration.
pub fn run_max98390d(snd_card: &str, conf: &str) -> Result<()> {
let settings = DeviceSettings::from_yaml_str(conf)?;
let mut card = Card::new(snd_card)?;
if !Path::new(&settings.dsm_param).exists() {
for s in &settings.amp_calibrations {
let mut amp_calib = match AmpCalibration::new(&mut card, s.clone()) {
Ok(amp) => amp,
Err(e) => {
error!("{}.", e);
continue;
}
};
if let Err(e) = amp_calib.set_volume(VolumeMode::Low) {
error!("failed to set volume to low: {}.", e);
}
}
return Err(Error::MissingDSMParam);
}
// If some error occurs during the calibration, the iteration will continue running the
// calibration for the next amp.
let results: Vec<Result<()>> = settings
.amp_calibrations
.into_iter()
.map(|s| {
let mut amp_calib = AmpCalibration::new(&mut card, s)?;
amp_calib.set_volume(VolumeMode::Low)?;
amp_calib.run()?;
amp_calib.set_volume(VolumeMode::High)?;
Ok(())
})
.filter_map(|res| res.err())
.map(|e| {
error!("calibration error: {}. volume remains low.", e);
Err(e)
})
.collect();
if !results.is_empty() {
return Err(Error::CalibrationFailed);
}
Ok(())
}
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