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 - http://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_master:1;
36 	unsigned int frame_clk_master:1;
37 };
38 
39 /*
40  * HDMI audio parameters
41  */
42 struct 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 
50 typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
51 				      bool plugged);
52 
53 struct hdmi_codec_pdata;
54 struct 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 (*digital_mute)(struct device *dev, void *data, bool enable);
80 
81 	/*
82 	 * Provides EDID-Like-Data from connected HDMI device.
83 	 * Optional
84 	 */
85 	int (*get_eld)(struct device *dev, void *data,
86 		       uint8_t *buf, size_t len);
87 
88 	/*
89 	 * Getting DAI ID
90 	 * Optional
91 	 */
92 	int (*get_dai_id)(struct snd_soc_component *comment,
93 			  struct device_node *endpoint);
94 
95 	/*
96 	 * Hook callback function to handle connector plug event.
97 	 * Optional
98 	 */
99 	int (*hook_plugged_cb)(struct device *dev, void *data,
100 			       hdmi_codec_plugged_cb fn,
101 			       struct device *codec_dev);
102 };
103 
104 /* HDMI codec initalization data */
105 struct hdmi_codec_pdata {
106 	const struct hdmi_codec_ops *ops;
107 	uint i2s:1;
108 	uint spdif:1;
109 	int max_i2s_channels;
110 	void *data;
111 };
112 
113 struct snd_soc_component;
114 struct snd_soc_jack;
115 
116 int hdmi_codec_set_jack_detect(struct snd_soc_component *component,
117 			       struct snd_soc_jack *jack);
118 
119 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
120 
121 #endif /* __HDMI_CODEC_H__ */
122