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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 |
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