1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * hdmi-codec.h - HDMI Codec driver API
5 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
7 * Author: Jyri Sarha <jsarha@ti.com>
10 #ifndef __HDMI_CODEC_H__
11 #define __HDMI_CODEC_H__
13 #include <linux/of_graph.h>
14 #include <linux/hdmi.h>
15 #include <sound/asoundef.h>
16 #include <sound/soc.h>
17 #include <uapi/sound/asound.h>
20 * Protocol between ASoC cpu-dai and HDMI-encoder
22 struct hdmi_codec_daifmt {
32 unsigned int bit_clk_inv:1;
33 unsigned int frame_clk_inv:1;
34 unsigned int bit_clk_provider:1;
35 unsigned int frame_clk_provider:1;
36 /* bit_fmt could be standard PCM format or
37 * IEC958 encoded format. ALSA IEC958 plugin will pass
38 * IEC958_SUBFRAME format to the underneath driver.
40 snd_pcm_format_t bit_fmt;
44 * HDMI audio parameters
46 struct hdmi_codec_params {
47 struct hdmi_audio_infoframe cea;
48 struct snd_aes_iec958 iec;
54 typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
57 struct hdmi_codec_pdata;
58 struct hdmi_codec_ops {
60 * Called when ASoC starts an audio stream setup.
63 int (*audio_startup)(struct device *dev, void *data);
66 * Configures HDMI-encoder for audio stream.
67 * Having either prepare or hw_params is mandatory.
69 int (*hw_params)(struct device *dev, void *data,
70 struct hdmi_codec_daifmt *fmt,
71 struct hdmi_codec_params *hparms);
74 * Configures HDMI-encoder for audio stream. Can be called
75 * multiple times for each setup.
77 * Having either prepare or hw_params is mandatory.
79 int (*prepare)(struct device *dev, void *data,
80 struct hdmi_codec_daifmt *fmt,
81 struct hdmi_codec_params *hparms);
84 * Shuts down the audio stream.
87 void (*audio_shutdown)(struct device *dev, void *data);
90 * Mute/unmute HDMI audio stream.
93 int (*mute_stream)(struct device *dev, void *data,
94 bool enable, int direction);
97 * Provides EDID-Like-Data from connected HDMI device.
100 int (*get_eld)(struct device *dev, void *data,
101 uint8_t *buf, size_t len);
107 int (*get_dai_id)(struct snd_soc_component *comment,
108 struct device_node *endpoint);
111 * Hook callback function to handle connector plug event.
114 int (*hook_plugged_cb)(struct device *dev, void *data,
115 hdmi_codec_plugged_cb fn,
116 struct device *codec_dev);
119 unsigned int no_capture_mute:1;
122 /* HDMI codec initalization data */
123 struct hdmi_codec_pdata {
124 const struct hdmi_codec_ops *ops;
126 uint no_i2s_playback:1;
127 uint no_i2s_capture:1;
129 uint no_spdif_playback:1;
130 uint no_spdif_capture:1;
131 int max_i2s_channels;
135 struct snd_soc_component;
138 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
140 #endif /* __HDMI_CODEC_H__ */