Merge tag 'drm-misc-fixes-2018-02-21' of git://anongit.freedesktop.org/drm/drm-misc...
[sfrench/cifs-2.6.git] / include / sound / hdmi-codec.h
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/of_graph.h>
22 #include <linux/hdmi.h>
23 #include <drm/drm_edid.h>
24 #include <sound/asoundef.h>
25 #include <sound/soc.h>
26 #include <uapi/sound/asound.h>
27
28 /*
29  * Protocol between ASoC cpu-dai and HDMI-encoder
30  */
31 struct hdmi_codec_daifmt {
32         enum {
33                 HDMI_I2S,
34                 HDMI_RIGHT_J,
35                 HDMI_LEFT_J,
36                 HDMI_DSP_A,
37                 HDMI_DSP_B,
38                 HDMI_AC97,
39                 HDMI_SPDIF,
40         } fmt;
41         unsigned int bit_clk_inv:1;
42         unsigned int frame_clk_inv:1;
43         unsigned int bit_clk_master:1;
44         unsigned int frame_clk_master:1;
45 };
46
47 /*
48  * HDMI audio parameters
49  */
50 struct hdmi_codec_params {
51         struct hdmi_audio_infoframe cea;
52         struct snd_aes_iec958 iec;
53         int sample_rate;
54         int sample_width;
55         int channels;
56 };
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          * 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          * Shuts down the audio stream.
76          * Mandatory
77          */
78         void (*audio_shutdown)(struct device *dev, void *data);
79
80         /*
81          * Mute/unmute HDMI audio stream.
82          * Optional
83          */
84         int (*digital_mute)(struct device *dev, void *data, bool enable);
85
86         /*
87          * Provides EDID-Like-Data from connected HDMI device.
88          * Optional
89          */
90         int (*get_eld)(struct device *dev, void *data,
91                        uint8_t *buf, size_t len);
92
93         /*
94          * Getting DAI ID
95          * Optional
96          */
97         int (*get_dai_id)(struct snd_soc_component *comment,
98                           struct device_node *endpoint);
99 };
100
101 /* HDMI codec initalization data */
102 struct hdmi_codec_pdata {
103         const struct hdmi_codec_ops *ops;
104         uint i2s:1;
105         uint spdif:1;
106         int max_i2s_channels;
107         void *data;
108 };
109
110 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
111
112 #endif /* __HDMI_CODEC_H__ */