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1/*
2 * hdmi-codec.h - HDMI Codec driver API
3 *
4 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Author: Jyri Sarha <jsarha@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17
18#ifndef __HDMI_CODEC_H__
19#define __HDMI_CODEC_H__
20
21#include <linux/hdmi.h>
22#include <drm/drm_edid.h>
23#include <sound/asoundef.h>
24#include <uapi/sound/asound.h>
25
26/*
27 * Protocol between ASoC cpu-dai and HDMI-encoder
28 */
29struct hdmi_codec_daifmt {
30 enum {
31 HDMI_I2S,
32 HDMI_RIGHT_J,
33 HDMI_LEFT_J,
34 HDMI_DSP_A,
35 HDMI_DSP_B,
36 HDMI_AC97,
37 HDMI_SPDIF,
38 } fmt;
39 unsigned int bit_clk_inv:1;
40 unsigned int frame_clk_inv:1;
41 unsigned int bit_clk_master:1;
42 unsigned int frame_clk_master:1;
43};
44
45/*
46 * HDMI audio parameters
47 */
48struct hdmi_codec_params {
49 struct hdmi_audio_infoframe cea;
50 struct snd_aes_iec958 iec;
51 int sample_rate;
52 int sample_width;
53 int channels;
54};
55
56struct hdmi_codec_pdata;
57struct hdmi_codec_ops {
58 /*
59 * Called when ASoC starts an audio stream setup.
60 * Optional
61 */
62 int (*audio_startup)(struct device *dev, void *data);
63
64 /*
65 * Configures HDMI-encoder for audio stream.
66 * Mandatory
67 */
68 int (*hw_params)(struct device *dev, void *data,
69 struct hdmi_codec_daifmt *fmt,
70 struct hdmi_codec_params *hparms);
71
72 /*
73 * Shuts down the audio stream.
74 * Mandatory
75 */
76 void (*audio_shutdown)(struct device *dev, void *data);
77
78 /*
79 * Mute/unmute HDMI audio stream.
80 * Optional
81 */
82 int (*digital_mute)(struct device *dev, void *data, bool enable);
83
84 /*
85 * Provides EDID-Like-Data from connected HDMI device.
86 * Optional
87 */
88 int (*get_eld)(struct device *dev, void *data,
89 uint8_t *buf, size_t len);
90};
91
92/* HDMI codec initalization data */
93struct hdmi_codec_pdata {
94 const struct hdmi_codec_ops *ops;
95 uint i2s:1;
96 uint spdif:1;
97 int max_i2s_channels;
98 void *data;
99};
100
101#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
102
103#endif /* __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 */
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};
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
50typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
51 bool plugged);
52
53struct hdmi_codec_pdata;
54struct hdmi_codec_ops {
55 /*
56 * Called when ASoC starts an audio stream setup.
57 * Optional
58 */
59 int (*audio_startup)(struct device *dev, void *data);
60
61 /*
62 * Configures HDMI-encoder for audio stream.
63 * Mandatory
64 */
65 int (*hw_params)(struct device *dev, void *data,
66 struct hdmi_codec_daifmt *fmt,
67 struct hdmi_codec_params *hparms);
68
69 /*
70 * Shuts down the audio stream.
71 * Mandatory
72 */
73 void (*audio_shutdown)(struct device *dev, void *data);
74
75 /*
76 * Mute/unmute HDMI audio stream.
77 * Optional
78 */
79 int (*mute_stream)(struct device *dev, void *data,
80 bool enable, int direction);
81
82 /*
83 * Provides EDID-Like-Data from connected HDMI device.
84 * Optional
85 */
86 int (*get_eld)(struct device *dev, void *data,
87 uint8_t *buf, size_t len);
88
89 /*
90 * Getting DAI ID
91 * Optional
92 */
93 int (*get_dai_id)(struct snd_soc_component *comment,
94 struct device_node *endpoint);
95
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);
103
104 /* bit field */
105 unsigned int no_capture_mute:1;
106};
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;
114 void *data;
115};
116
117struct 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
123#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
124
125#endif /* __HDMI_CODEC_H__ */