Chih-Yang Hsia 7c97b2e7d3 devices: virtio: snd: Change start_pcm_worker to be polled by streams ... Improvements: - Once a {playback, capture} stream is initiated. We should start write (read) audio in each callback period or the underlaying audio server will underrun (overrun). (Even in the WorkerStatus::Pause state). - Change the polling loop logic to wait for next buffer -> check status -> try_next desc_chain or exit -> transfer data or exit And make start_pcm_worker act like real audio hw device, which consumes data in every fixed period. - Right before leaving from WorkerStatus::Quit, we still need to transfer data to/from the running stream to prevent underrun or overrun. Changes: - changes in start_pcm_worker: - extract read_data, write_data utils - implement From<Result<()>, Error> for virtio_snd_pcm_status - poll next_{capture, playback}_buffer - if status == WorkerStatus::Pause, still need to transfer data to prevent underrun or overrun - split Output and Input stream logic - use copy_from or copy_to instead to io::copy - remove Condvar usage - changes in audio_streams - add copy_from in AudioBuffer and AsyncPlaybackBuffer - add copy_to in AudioBuffer and AsyncCaptureBuffer BUG=b:210197743 TEST=alsa_conformance_test and make sure there is no `ERR cras_server[1818]: Error reading msg from client: rc: -104` or `ERR cras_server[1818]: fetch err: -32 for 6490001` errors. Change-Id: I004969040881cb2d46b54589e3e7e634ea67d152 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3341135 Reviewed-by: Chirantan Ekbote <chirantan@chromium.org> Tested-by: kokoro <noreply+kokoro@google.com> Commit-Queue: Chih-Yang Hsia <paulhsia@chromium.org>		2021-12-15 11:28:55 +00:00
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irqchip
pci	pci_root: Emulate PCIE base address register in host bridge	2021-12-08 12:30:30 +00:00
platform
register_space
usb
utils
virtio	devices: virtio: snd: Change start_pcm_worker to be polled by streams	2021-12-15 11:28:55 +00:00
acpi.rs	acpi: expose PCI reset register in ACPI	2021-12-08 06:33:00 +00:00
bat.rs
bus.rs
cmos.rs
direct_io.rs	crosvm: use BusRange in DirectIoOption.	2021-12-08 00:22:43 +00:00
direct_irq.rs
i8042.rs
lib.rs
pit.rs
pl030.rs
proxy.rs
serial.rs
serial_device.rs
vfio.rs	devices: vfio: Add methods to read/write region at specified address	2021-12-08 16:19:48 +00:00