Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | * |
| 3 | * linux/sound/sdw.h -- SoundWire helpers for ALSA/ASoC |
| 4 | * |
| 5 | * Copyright (c) 2022 Cirrus Logic Inc. |
| 6 | * |
| 7 | * Author: Charles Keepax <ckeepax@opensource.cirrus.com> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/soundwire/sdw.h> |
| 11 | #include <sound/asound.h> |
| 12 | #include <sound/pcm.h> |
| 13 | #include <sound/pcm_params.h> |
| 14 | |
| 15 | #ifndef __INCLUDE_SOUND_SDW_H |
| 16 | #define __INCLUDE_SOUND_SDW_H |
| 17 | |
| 18 | /** |
| 19 | * snd_sdw_params_to_config() - Conversion from hw_params to SoundWire config |
| 20 | * |
| 21 | * @substream: Pointer to the PCM substream structure |
| 22 | * @params: Pointer to the hardware params structure |
| 23 | * @stream_config: Stream configuration for the SoundWire audio stream |
| 24 | * @port_config: Port configuration for the SoundWire audio stream |
| 25 | * |
| 26 | * This function provides a basic conversion from the hw_params structure to |
| 27 | * SoundWire configuration structures. The user will at a minimum need to also |
| 28 | * set the port number in the port config, but may also override more of the |
| 29 | * setup, or in the case of a complex user, not use this helper at all and |
| 30 | * open-code everything. |
| 31 | */ |
| 32 | static inline void snd_sdw_params_to_config(struct snd_pcm_substream *substream, |
| 33 | struct snd_pcm_hw_params *params, |
| 34 | struct sdw_stream_config *stream_config, |
| 35 | struct sdw_port_config *port_config) |
| 36 | { |
| 37 | stream_config->frame_rate = params_rate(params); |
| 38 | stream_config->ch_count = params_channels(params); |
| 39 | stream_config->bps = snd_pcm_format_width(params_format(params)); |
| 40 | |
| 41 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 42 | stream_config->direction = SDW_DATA_DIR_RX; |
| 43 | else |
| 44 | stream_config->direction = SDW_DATA_DIR_TX; |
| 45 | |
| 46 | port_config->ch_mask = GENMASK(stream_config->ch_count - 1, 0); |
| 47 | } |
| 48 | |
| 49 | #endif |
| 50 |
Warning: This file is not a C or C++ file. It does not have highlighting.