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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.
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
;
128 int max_i2s_channels
;
132 struct snd_soc_component
;
135 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
137 #endif /* __HDMI_CODEC_H__ */