| 1 | /* SPDX-License-Identifier: GPL-2.0-only */
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| 2 | /*
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| 3 | * hdmi-codec.h - HDMI Codec driver API
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| 4 | *
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| 5 | * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
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| 6 | *
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| 7 | * Author: Jyri Sarha <jsarha@ti.com>
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| 8 | */
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| 9 |
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| 10 | #ifndef __HDMI_CODEC_H__
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| 11 | #define __HDMI_CODEC_H__
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| 12 |
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| 13 | #include <linux/of_graph.h>
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| 14 | #include <linux/hdmi.h>
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| 15 | #include <sound/asoundef.h>
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| 16 | #include <sound/soc.h>
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| 17 | #include <uapi/sound/asound.h>
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| 18 |
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| 19 | /*
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| 20 | * Protocol between ASoC cpu-dai and HDMI-encoder
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| 21 | */
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| 22 | struct hdmi_codec_daifmt {
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| 23 | enum {
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| 24 | HDMI_I2S,
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| 25 | HDMI_RIGHT_J,
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| 26 | HDMI_LEFT_J,
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| 27 | HDMI_DSP_A,
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| 28 | HDMI_DSP_B,
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| 29 | HDMI_AC97,
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| 30 | HDMI_SPDIF,
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| 31 | } fmt;
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| 32 | unsigned int bit_clk_inv:1;
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| 33 | unsigned int frame_clk_inv:1;
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| 34 | unsigned int bit_clk_provider:1;
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| 35 | unsigned int frame_clk_provider:1;
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| 36 | /* bit_fmt could be standard PCM format or
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| 37 | * IEC958 encoded format. ALSA IEC958 plugin will pass
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| 38 | * IEC958_SUBFRAME format to the underneath driver.
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| 39 | */
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| 40 | snd_pcm_format_t bit_fmt;
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| 41 | };
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| 42 |
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| 43 | /*
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| 44 | * HDMI audio parameters
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| 45 | */
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| 46 | struct hdmi_codec_params {
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| 47 | struct hdmi_audio_infoframe cea;
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| 48 | struct snd_aes_iec958 iec;
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| 49 | int sample_rate;
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| 50 | int sample_width;
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| 51 | int channels;
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| 52 | };
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| 53 |
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| 54 | typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
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| 55 | bool plugged);
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| 56 |
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| 57 | struct hdmi_codec_pdata;
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| 58 | struct hdmi_codec_ops {
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| 59 | /*
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| 60 | * Called when ASoC starts an audio stream setup.
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| 61 | * Optional
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| 62 | */
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| 63 | int (*audio_startup)(struct device *dev, void *data);
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| 64 |
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| 65 | /*
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| 66 | * Configures HDMI-encoder for audio stream.
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| 67 | * Having either prepare or hw_params is mandatory.
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| 68 | */
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| 69 | int (*hw_params)(struct device *dev, void *data,
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| 70 | struct hdmi_codec_daifmt *fmt,
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| 71 | struct hdmi_codec_params *hparms);
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| 72 |
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| 73 | /*
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| 74 | * Configures HDMI-encoder for audio stream. Can be called
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| 75 | * multiple times for each setup.
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| 76 | *
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| 77 | * Having either prepare or hw_params is mandatory.
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| 78 | */
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| 79 | int (*prepare)(struct device *dev, void *data,
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| 80 | struct hdmi_codec_daifmt *fmt,
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| 81 | struct hdmi_codec_params *hparms);
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| 82 |
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| 83 | /*
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| 84 | * Shuts down the audio stream.
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| 85 | * Mandatory
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| 86 | */
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| 87 | void (*audio_shutdown)(struct device *dev, void *data);
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| 88 |
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| 89 | /*
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| 90 | * Mute/unmute HDMI audio stream.
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| 91 | * Optional
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| 92 | */
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| 93 | int (*mute_stream)(struct device *dev, void *data,
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| 94 | bool enable, int direction);
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| 95 |
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| 96 | /*
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| 97 | * Provides EDID-Like-Data from connected HDMI device.
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| 98 | * Optional
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| 99 | */
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| 100 | int (*get_eld)(struct device *dev, void *data,
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| 101 | uint8_t *buf, size_t len);
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| 102 |
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| 103 | /*
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| 104 | * Getting DAI ID
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| 105 | * Optional
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| 106 | */
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| 107 | int (*get_dai_id)(struct snd_soc_component *comment,
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| 108 | struct device_node *endpoint);
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| 109 |
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| 110 | /*
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| 111 | * Hook callback function to handle connector plug event.
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| 112 | * Optional
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| 113 | */
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| 114 | int (*hook_plugged_cb)(struct device *dev, void *data,
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| 115 | hdmi_codec_plugged_cb fn,
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| 116 | struct device *codec_dev);
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| 117 |
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| 118 | /* bit field */
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| 119 | unsigned int no_capture_mute:1;
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| 120 | };
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| 121 |
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| 122 | /* HDMI codec initalization data */
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| 123 | struct hdmi_codec_pdata {
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| 124 | const struct hdmi_codec_ops *ops;
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| 125 | uint i2s:1;
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| 126 | uint no_i2s_playback:1;
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| 127 | uint no_i2s_capture:1;
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| 128 | uint spdif:1;
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| 129 | uint no_spdif_playback:1;
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| 130 | uint no_spdif_capture:1;
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| 131 | int max_i2s_channels;
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| 132 | void *data;
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| 133 | };
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| 134 |
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| 135 | struct snd_soc_component;
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| 136 | struct snd_soc_jack;
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| 137 |
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| 138 | #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
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| 139 |
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| 140 | #endif /* __HDMI_CODEC_H__ */
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