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_master:1;
36 unsigned int frame_clk_master: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.
70 int (*hw_params)(struct device *dev, void *data,
71 struct hdmi_codec_daifmt *fmt,
72 struct hdmi_codec_params *hparms);
75 * Shuts down the audio stream.
78 void (*audio_shutdown)(struct device *dev, void *data);
81 * Mute/unmute HDMI audio stream.
84 int (*mute_stream)(struct device *dev, void *data,
85 bool enable, int direction);
88 * Provides EDID-Like-Data from connected HDMI device.
91 int (*get_eld)(struct device *dev, void *data,
92 uint8_t *buf, size_t len);
98 int (*get_dai_id)(struct snd_soc_component *comment,
99 struct device_node *endpoint);
102 * Hook callback function to handle connector plug event.
105 int (*hook_plugged_cb)(struct device *dev, void *data,
106 hdmi_codec_plugged_cb fn,
107 struct device *codec_dev);
110 unsigned int no_capture_mute:1;
113 /* HDMI codec initalization data */
114 struct hdmi_codec_pdata {
115 const struct hdmi_codec_ops *ops;
118 int max_i2s_channels;
122 struct snd_soc_component;
125 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
127 #endif /* __HDMI_CODEC_H__ */