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 <drm/drm_edid.h>
16 #include <sound/asoundef.h>
17 #include <sound/soc.h>
18 #include <uapi/sound/asound.h>
21 * Protocol between ASoC cpu-dai and HDMI-encoder
23 struct hdmi_codec_daifmt {
33 unsigned int bit_clk_inv:1;
34 unsigned int frame_clk_inv:1;
35 unsigned int bit_clk_provider:1;
36 unsigned int frame_clk_provider:1;
37 /* bit_fmt could be standard PCM format or
38 * IEC958 encoded format. ALSA IEC958 plugin will pass
39 * IEC958_SUBFRAME format to the underneath driver.
41 snd_pcm_format_t bit_fmt;
45 * HDMI audio parameters
47 struct hdmi_codec_params {
48 struct hdmi_audio_infoframe cea;
49 struct snd_aes_iec958 iec;
55 typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
58 struct hdmi_codec_pdata;
59 struct hdmi_codec_ops {
61 * Called when ASoC starts an audio stream setup.
64 int (*audio_startup)(struct device *dev, void *data);
67 * Configures HDMI-encoder for audio stream.
68 * Having either prepare or hw_params is mandatory.
70 int (*hw_params)(struct device *dev, void *data,
71 struct hdmi_codec_daifmt *fmt,
72 struct hdmi_codec_params *hparms);
75 * Configures HDMI-encoder for audio stream. Can be called
76 * multiple times for each setup.
78 * Having either prepare or hw_params is mandatory.
80 int (*prepare)(struct device *dev, void *data,
81 struct hdmi_codec_daifmt *fmt,
82 struct hdmi_codec_params *hparms);
85 * Shuts down the audio stream.
88 void (*audio_shutdown)(struct device *dev, void *data);
91 * Mute/unmute HDMI audio stream.
94 int (*mute_stream)(struct device *dev, void *data,
95 bool enable, int direction);
98 * Provides EDID-Like-Data from connected HDMI device.
101 int (*get_eld)(struct device *dev, void *data,
102 uint8_t *buf, size_t len);
108 int (*get_dai_id)(struct snd_soc_component *comment,
109 struct device_node *endpoint);
112 * Hook callback function to handle connector plug event.
115 int (*hook_plugged_cb)(struct device *dev, void *data,
116 hdmi_codec_plugged_cb fn,
117 struct device *codec_dev);
120 unsigned int no_capture_mute:1;
123 /* HDMI codec initalization data */
124 struct hdmi_codec_pdata {
125 const struct hdmi_codec_ops *ops;
127 uint no_i2s_playback:1;
128 uint no_i2s_capture:1;
130 uint no_spdif_playback:1;
131 uint no_spdif_capture:1;
132 int max_i2s_channels;
136 struct snd_soc_component;
139 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
141 #endif /* __HDMI_CODEC_H__ */