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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* hdmi-codec.h - HDMI Codec driver API
*
* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
*
* Author: Jyri Sarha <[email protected]>
*/
#ifndef __HDMI_CODEC_H__
#define __HDMI_CODEC_H__
#include <linux/of_graph.h>
#include <linux/hdmi.h>
#include <drm/drm_edid.h>
#include <sound/asoundef.h>
#include <sound/soc.h>
#include <uapi/sound/asound.h>
/*
* Protocol between ASoC cpu-dai and HDMI-encoder
*/
struct hdmi_codec_daifmt {
enum {
HDMI_I2S,
HDMI_RIGHT_J,
HDMI_LEFT_J,
HDMI_DSP_A,
HDMI_DSP_B,
HDMI_AC97,
HDMI_SPDIF,
} fmt;
unsigned int bit_clk_inv:1;
unsigned int frame_clk_inv:1;
unsigned int bit_clk_master:1;
unsigned int frame_clk_master:1;
/* bit_fmt could be standard PCM format or
* IEC958 encoded format. ALSA IEC958 plugin will pass
* IEC958_SUBFRAME format to the underneath driver.
*/
snd_pcm_format_t bit_fmt;
};
/*
* HDMI audio parameters
*/
struct hdmi_codec_params {
struct hdmi_audio_infoframe cea;
struct snd_aes_iec958 iec;
int sample_rate;
int sample_width;
int channels;
};
typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
bool plugged);
struct hdmi_codec_pdata;
struct hdmi_codec_ops {
/*
* Called when ASoC starts an audio stream setup.
* Optional
*/
int (*audio_startup)(struct device *dev, void *data);
/*
* Configures HDMI-encoder for audio stream.
* Having either prepare or hw_params is mandatory.
*/
int (*hw_params)(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms);
/*
* Configures HDMI-encoder for audio stream. Can be called
* multiple times for each setup.
*
* Having either prepare or hw_params is mandatory.
*/
int (*prepare)(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms);
/*
* Shuts down the audio stream.
* Mandatory
*/
void (*audio_shutdown)(struct device *dev, void *data);
/*
* Mute/unmute HDMI audio stream.
* Optional
*/
int (*mute_stream)(struct device *dev, void *data,
bool enable, int direction);
/*
* Provides EDID-Like-Data from connected HDMI device.
* Optional
*/
int (*get_eld)(struct device *dev, void *data,
uint8_t *buf, size_t len);
/*
* Getting DAI ID
* Optional
*/
int (*get_dai_id)(struct snd_soc_component *comment,
struct device_node *endpoint);
/*
* Hook callback function to handle connector plug event.
* Optional
*/
int (*hook_plugged_cb)(struct device *dev, void *data,
hdmi_codec_plugged_cb fn,
struct device *codec_dev);
/* bit field */
unsigned int no_capture_mute:1;
};
/* HDMI codec initalization data */
struct hdmi_codec_pdata {
const struct hdmi_codec_ops *ops;
uint i2s:1;
uint spdif:1;
int max_i2s_channels;
void *data;
};
struct snd_soc_component;
struct snd_soc_jack;
#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
#endif /* __HDMI_CODEC_H__ */
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