This series implements a driver part of the virtio sound device specification v8 [1].
The driver supports PCM playback and capture substreams, jack and channel map controls. A message-based transport is used to write/read PCM frames to/from a device.
As a device part was used OpenSynergy proprietary implementation.
v7 changes: - Moved the snd_pcm_period_elapsed() call from the interrupt handler to the kernel worker for being consistent with the non-atomic mode of the PCM device. - Removed SNDRV_PCM_INFO_RESUME flag. Now ops->prepare() sets the parameters for the substream if it was previously suspended. - Some additional code readability improvements/comments.
[1] https://lists.oasis-open.org/archives/virtio-dev/202003/msg00185.html
Anton Yakovlev (9): uapi: virtio_ids: add a sound device type ID from OASIS spec ALSA: virtio: add virtio sound driver ALSA: virtio: handling control messages ALSA: virtio: build PCM devices and substream hardware descriptors ALSA: virtio: handling control and I/O messages for the PCM device ALSA: virtio: PCM substream operators ALSA: virtio: introduce jack support ALSA: virtio: introduce PCM channel map support ALSA: virtio: introduce device suspend/resume support
MAINTAINERS | 9 + include/uapi/linux/virtio_ids.h | 1 + include/uapi/linux/virtio_snd.h | 334 +++++++++++++++++++++ sound/Kconfig | 2 + sound/Makefile | 3 +- sound/virtio/Kconfig | 10 + sound/virtio/Makefile | 13 + sound/virtio/virtio_card.c | 449 ++++++++++++++++++++++++++++ sound/virtio/virtio_card.h | 111 +++++++ sound/virtio/virtio_chmap.c | 219 ++++++++++++++ sound/virtio/virtio_ctl_msg.c | 310 +++++++++++++++++++ sound/virtio/virtio_ctl_msg.h | 78 +++++ sound/virtio/virtio_jack.c | 233 +++++++++++++++ sound/virtio/virtio_pcm.c | 513 ++++++++++++++++++++++++++++++++ sound/virtio/virtio_pcm.h | 124 ++++++++ sound/virtio/virtio_pcm_msg.c | 414 ++++++++++++++++++++++++++ sound/virtio/virtio_pcm_ops.c | 464 +++++++++++++++++++++++++++++ 17 files changed, 3286 insertions(+), 1 deletion(-) create mode 100644 include/uapi/linux/virtio_snd.h create mode 100644 sound/virtio/Kconfig create mode 100644 sound/virtio/Makefile create mode 100644 sound/virtio/virtio_card.c create mode 100644 sound/virtio/virtio_card.h create mode 100644 sound/virtio/virtio_chmap.c create mode 100644 sound/virtio/virtio_ctl_msg.c create mode 100644 sound/virtio/virtio_ctl_msg.h create mode 100644 sound/virtio/virtio_jack.c create mode 100644 sound/virtio/virtio_pcm.c create mode 100644 sound/virtio/virtio_pcm.h create mode 100644 sound/virtio/virtio_pcm_msg.c create mode 100644 sound/virtio/virtio_pcm_ops.c