Linux 6.9-rc1
[linux-2.6-microblaze.git] / include / sound / hdmi-codec.h
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 <sound/asoundef.h>
16 #include <sound/soc.h>
17 #include <uapi/sound/asound.h>
18
19 /*
20  * Protocol between ASoC cpu-dai and HDMI-encoder
21  */
22 struct hdmi_codec_daifmt {
23         enum {
24                 HDMI_I2S,
25                 HDMI_RIGHT_J,
26                 HDMI_LEFT_J,
27                 HDMI_DSP_A,
28                 HDMI_DSP_B,
29                 HDMI_AC97,
30                 HDMI_SPDIF,
31         } fmt;
32         unsigned int bit_clk_inv:1;
33         unsigned int frame_clk_inv:1;
34         unsigned int bit_clk_provider:1;
35         unsigned int frame_clk_provider:1;
36         /* bit_fmt could be standard PCM format or
37          * IEC958 encoded format. ALSA IEC958 plugin will pass
38          * IEC958_SUBFRAME format to the underneath driver.
39          */
40         snd_pcm_format_t bit_fmt;
41 };
42
43 /*
44  * HDMI audio parameters
45  */
46 struct hdmi_codec_params {
47         struct hdmi_audio_infoframe cea;
48         struct snd_aes_iec958 iec;
49         int sample_rate;
50         int sample_width;
51         int channels;
52 };
53
54 typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
55                                       bool plugged);
56
57 struct hdmi_codec_pdata;
58 struct hdmi_codec_ops {
59         /*
60          * Called when ASoC starts an audio stream setup.
61          * Optional
62          */
63         int (*audio_startup)(struct device *dev, void *data);
64
65         /*
66          * Configures HDMI-encoder for audio stream.
67          * Having either prepare or hw_params is mandatory.
68          */
69         int (*hw_params)(struct device *dev, void *data,
70                          struct hdmi_codec_daifmt *fmt,
71                          struct hdmi_codec_params *hparms);
72
73         /*
74          * Configures HDMI-encoder for audio stream. Can be called
75          * multiple times for each setup.
76          *
77          * Having either prepare or hw_params is mandatory.
78          */
79         int (*prepare)(struct device *dev, void *data,
80                        struct hdmi_codec_daifmt *fmt,
81                        struct hdmi_codec_params *hparms);
82
83         /*
84          * Shuts down the audio stream.
85          * Mandatory
86          */
87         void (*audio_shutdown)(struct device *dev, void *data);
88
89         /*
90          * Mute/unmute HDMI audio stream.
91          * Optional
92          */
93         int (*mute_stream)(struct device *dev, void *data,
94                            bool enable, int direction);
95
96         /*
97          * Provides EDID-Like-Data from connected HDMI device.
98          * Optional
99          */
100         int (*get_eld)(struct device *dev, void *data,
101                        uint8_t *buf, size_t len);
102
103         /*
104          * Getting DAI ID
105          * Optional
106          */
107         int (*get_dai_id)(struct snd_soc_component *comment,
108                           struct device_node *endpoint);
109
110         /*
111          * Hook callback function to handle connector plug event.
112          * Optional
113          */
114         int (*hook_plugged_cb)(struct device *dev, void *data,
115                                hdmi_codec_plugged_cb fn,
116                                struct device *codec_dev);
117
118         /* bit field */
119         unsigned int no_capture_mute:1;
120 };
121
122 /* HDMI codec initalization data */
123 struct hdmi_codec_pdata {
124         const struct hdmi_codec_ops *ops;
125         uint i2s:1;
126         uint no_i2s_playback:1;
127         uint no_i2s_capture:1;
128         uint spdif:1;
129         uint no_spdif_playback:1;
130         uint no_spdif_capture:1;
131         int max_i2s_channels;
132         void *data;
133 };
134
135 struct snd_soc_component;
136 struct snd_soc_jack;
137
138 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
139
140 #endif /* __HDMI_CODEC_H__ */