Merge tag 'dma-mapping-6.5-2023-07-09' of git://git.infradead.org/users/hch/dma-mapping
[platform/kernel/linux-starfive.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 <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  */
23 struct 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_provider:1;
36         unsigned int frame_clk_provider: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  */
47 struct 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
55 typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
56                                       bool plugged);
57
58 struct hdmi_codec_pdata;
59 struct 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          * Having either prepare or hw_params is 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          * Configures HDMI-encoder for audio stream. Can be called
76          * multiple times for each setup.
77          *
78          * Having either prepare or hw_params is mandatory.
79          */
80         int (*prepare)(struct device *dev, void *data,
81                        struct hdmi_codec_daifmt *fmt,
82                        struct hdmi_codec_params *hparms);
83
84         /*
85          * Shuts down the audio stream.
86          * Mandatory
87          */
88         void (*audio_shutdown)(struct device *dev, void *data);
89
90         /*
91          * Mute/unmute HDMI audio stream.
92          * Optional
93          */
94         int (*mute_stream)(struct device *dev, void *data,
95                            bool enable, int direction);
96
97         /*
98          * Provides EDID-Like-Data from connected HDMI device.
99          * Optional
100          */
101         int (*get_eld)(struct device *dev, void *data,
102                        uint8_t *buf, size_t len);
103
104         /*
105          * Getting DAI ID
106          * Optional
107          */
108         int (*get_dai_id)(struct snd_soc_component *comment,
109                           struct device_node *endpoint);
110
111         /*
112          * Hook callback function to handle connector plug event.
113          * Optional
114          */
115         int (*hook_plugged_cb)(struct device *dev, void *data,
116                                hdmi_codec_plugged_cb fn,
117                                struct device *codec_dev);
118
119         /* bit field */
120         unsigned int no_capture_mute:1;
121 };
122
123 /* HDMI codec initalization data */
124 struct hdmi_codec_pdata {
125         const struct hdmi_codec_ops *ops;
126         uint i2s:1;
127         uint no_i2s_playback:1;
128         uint no_i2s_capture:1;
129         uint spdif:1;
130         uint no_spdif_playback:1;
131         uint no_spdif_capture:1;
132         int max_i2s_channels;
133         void *data;
134 };
135
136 struct snd_soc_component;
137 struct snd_soc_jack;
138
139 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
140
141 #endif /* __HDMI_CODEC_H__ */