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Diffstat (limited to 'include/sound/sdw.h')
| -rw-r--r-- | include/sound/sdw.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/sound/sdw.h b/include/sound/sdw.h new file mode 100644 index 000000000000..6dcdb3228dba --- /dev/null +++ b/include/sound/sdw.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * linux/sound/sdw.h -- SoundWire helpers for ALSA/ASoC + * + * Copyright (c) 2022 Cirrus Logic Inc. + * + * Author: Charles Keepax <ckeepax@opensource.cirrus.com> + */ + +#include <linux/soundwire/sdw.h> +#include <sound/asound.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> + +#ifndef __INCLUDE_SOUND_SDW_H +#define __INCLUDE_SOUND_SDW_H + +/** + * snd_sdw_params_to_config() - Conversion from hw_params to SoundWire config + * + * @substream: Pointer to the PCM substream structure + * @params: Pointer to the hardware params structure + * @stream_config: Stream configuration for the SoundWire audio stream + * @port_config: Port configuration for the SoundWire audio stream + * + * This function provides a basic conversion from the hw_params structure to + * SoundWire configuration structures. The user will at a minimum need to also + * set the port number in the port config, but may also override more of the + * setup, or in the case of a complex user, not use this helper at all and + * open-code everything. + */ +static inline void snd_sdw_params_to_config(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct sdw_stream_config *stream_config, + struct sdw_port_config *port_config) +{ + stream_config->frame_rate = params_rate(params); + stream_config->ch_count = params_channels(params); + stream_config->bps = snd_pcm_format_width(params_format(params)); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + stream_config->direction = SDW_DATA_DIR_RX; + else + stream_config->direction = SDW_DATA_DIR_TX; + + port_config->ch_mask = GENMASK(stream_config->ch_count - 1, 0); +} + +#endif |