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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  */
29 struct 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         int bit_clk_inv:1;
40         int frame_clk_inv:1;
41         int bit_clk_master:1;
42         int frame_clk_master:1;
43 };
44
45 /*
46  * HDMI audio parameters
47  */
48 struct 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
56 struct hdmi_codec_pdata;
57 struct 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 */
93 struct 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__ */