Release 4.7 include/sound/hdmi-codec.h

/*
 * hdmi-codec.h - HDMI Codec driver API
 *
 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
 *
 * Author: Jyri Sarha <jsarha@ti.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#ifndef __HDMI_CODEC_H__

#define __HDMI_CODEC_H__

#include <linux/hdmi.h>
#include <drm/drm_edid.h>
#include <sound/asoundef.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;
	
int bit_clk_inv:1;
	
int frame_clk_inv:1;
	
int bit_clk_master:1;
	
int frame_clk_master:1;
};

/*
 * 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;
};


struct hdmi_codec_ops {
	/*
         * Called when ASoC starts an audio stream setup.
         * Optional
         */
	
int (*audio_startup)(struct device *dev);

	/*
         * Configures HDMI-encoder for audio stream.
         * Mandatory
         */
	
int (*hw_params)(struct device *dev,
			 struct hdmi_codec_daifmt *fmt,
			 struct hdmi_codec_params *hparms);

	/*
         * Shuts down the audio stream.
         * Mandatory
         */
	
void (*audio_shutdown)(struct device *dev);

	/*
         * Mute/unmute HDMI audio stream.
         * Optional
         */
	
int (*digital_mute)(struct device *dev, bool enable);

	/*
         * Provides EDID-Like-Data from connected HDMI device.
         * Optional
         */
	
int (*get_eld)(struct device *dev, uint8_t *buf, size_t len);
};

/* HDMI codec initalization data */

struct hdmi_codec_pdata {
	
const struct hdmi_codec_ops *ops;
	
uint i2s:1;
	
uint spdif:1;
	
int max_i2s_channels;
};


#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"

#endif /* __HDMI_CODEC_H__ */
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Directory: include/sound

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