linux/sound/virtio/virtio_chmap.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * virtio-snd: Virtio sound device
 * Copyright (C) 2021 OpenSynergy GmbH
 */
#include <linux/virtio_config.h>

#include "virtio_card.h"

/* VirtIO->ALSA channel position map */
static const u8 g_v2a_position_map[] = …;

/**
 * virtsnd_chmap_parse_cfg() - Parse the channel map configuration.
 * @snd: VirtIO sound device.
 *
 * This function is called during initial device initialization.
 *
 * Context: Any context that permits to sleep.
 * Return: 0 on success, -errno on failure.
 */
int virtsnd_chmap_parse_cfg(struct virtio_snd *snd)
{ … }

/**
 * virtsnd_chmap_add_ctls() - Create an ALSA control for channel maps.
 * @pcm: ALSA PCM device.
 * @direction: PCM stream direction (SNDRV_PCM_STREAM_XXX).
 * @vs: VirtIO PCM stream.
 *
 * Context: Any context.
 * Return: 0 on success, -errno on failure.
 */
static int virtsnd_chmap_add_ctls(struct snd_pcm *pcm, int direction,
				  struct virtio_pcm_stream *vs)
{ … }

/**
 * virtsnd_chmap_build_devs() - Build ALSA controls for channel maps.
 * @snd: VirtIO sound device.
 *
 * Context: Any context.
 * Return: 0 on success, -errno on failure.
 */
int virtsnd_chmap_build_devs(struct virtio_snd *snd)
{ … }