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Thomas Gleixner1802d0b2019-05-27 08:55:21 +02001/* SPDX-License-Identifier: GPL-2.0-only */
Jyri Sarha09184112016-03-31 16:36:00 +03002/*
3 * hdmi-codec.h - HDMI Codec driver API
4 *
Alexander A. Klimov7ed33ea2020-07-19 17:17:05 +02005 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
Jyri Sarha09184112016-03-31 16:36:00 +03006 *
7 * Author: Jyri Sarha <jsarha@ti.com>
Jyri Sarha09184112016-03-31 16:36:00 +03008 */
9
10#ifndef __HDMI_CODEC_H__
11#define __HDMI_CODEC_H__
12
Kuninori Morimoto96203fb2017-05-18 01:40:20 +000013#include <linux/of_graph.h>
Jyri Sarha09184112016-03-31 16:36:00 +030014#include <linux/hdmi.h>
15#include <drm/drm_edid.h>
16#include <sound/asoundef.h>
Kuninori Morimoto96203fb2017-05-18 01:40:20 +000017#include <sound/soc.h>
Jyri Sarha09184112016-03-31 16:36:00 +030018#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;
Takashi Sakamoto9e4d59a2016-12-16 18:26:54 +090033 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;
Jyri Sarha09184112016-03-31 16:36:00 +030037};
38
39/*
40 * HDMI audio parameters
41 */
42struct hdmi_codec_params {
43 struct hdmi_audio_infoframe cea;
44 struct snd_aes_iec958 iec;
45 int sample_rate;
46 int sample_width;
47 int channels;
48};
49
Cheng-Yi Chiang6fa59632019-07-17 16:33:23 +080050typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
51 bool plugged);
52
Kuninori Morimotoefc91942016-06-24 02:47:55 +000053struct hdmi_codec_pdata;
Jyri Sarha09184112016-03-31 16:36:00 +030054struct hdmi_codec_ops {
55 /*
56 * Called when ASoC starts an audio stream setup.
57 * Optional
58 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000059 int (*audio_startup)(struct device *dev, void *data);
Jyri Sarha09184112016-03-31 16:36:00 +030060
61 /*
62 * Configures HDMI-encoder for audio stream.
63 * Mandatory
64 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000065 int (*hw_params)(struct device *dev, void *data,
Jyri Sarha09184112016-03-31 16:36:00 +030066 struct hdmi_codec_daifmt *fmt,
67 struct hdmi_codec_params *hparms);
68
69 /*
70 * Shuts down the audio stream.
71 * Mandatory
72 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000073 void (*audio_shutdown)(struct device *dev, void *data);
Jyri Sarha09184112016-03-31 16:36:00 +030074
75 /*
76 * Mute/unmute HDMI audio stream.
77 * Optional
78 */
Kuninori Morimotod7897102020-07-09 10:55:45 +090079 int (*mute_stream)(struct device *dev, void *data,
80 bool enable, int direction);
Jyri Sarha09184112016-03-31 16:36:00 +030081
82 /*
83 * Provides EDID-Like-Data from connected HDMI device.
84 * Optional
85 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000086 int (*get_eld)(struct device *dev, void *data,
87 uint8_t *buf, size_t len);
Kuninori Morimoto96203fb2017-05-18 01:40:20 +000088
89 /*
90 * Getting DAI ID
91 * Optional
92 */
93 int (*get_dai_id)(struct snd_soc_component *comment,
94 struct device_node *endpoint);
Cheng-Yi Chiang6fa59632019-07-17 16:33:23 +080095
96 /*
97 * Hook callback function to handle connector plug event.
98 * Optional
99 */
100 int (*hook_plugged_cb)(struct device *dev, void *data,
101 hdmi_codec_plugged_cb fn,
102 struct device *codec_dev);
Kuninori Morimotod7897102020-07-09 10:55:45 +0900103
104 /* bit field */
105 unsigned int no_capture_mute:1;
Jyri Sarha09184112016-03-31 16:36:00 +0300106};
107
108/* HDMI codec initalization data */
109struct hdmi_codec_pdata {
110 const struct hdmi_codec_ops *ops;
111 uint i2s:1;
112 uint spdif:1;
113 int max_i2s_channels;
Kuninori Morimotoefc91942016-06-24 02:47:55 +0000114 void *data;
Jyri Sarha09184112016-03-31 16:36:00 +0300115};
116
Cheng-Yi Chiang6fa59632019-07-17 16:33:23 +0800117struct snd_soc_component;
118struct snd_soc_jack;
119
120int hdmi_codec_set_jack_detect(struct snd_soc_component *component,
121 struct snd_soc_jack *jack);
122
Jyri Sarha09184112016-03-31 16:36:00 +0300123#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
124
125#endif /* __HDMI_CODEC_H__ */