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