block: Do not discard buffers under a mounted filesystem
[linux-2.6-microblaze.git] / include / sound / 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  */
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 (*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 */
109 struct 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
117 struct snd_soc_component;
118 struct snd_soc_jack;
119
120 int 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__ */