1/*
  2 * hdmi-codec.h - HDMI Codec driver API
  3 *
  4 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
  5 *
  6 * Author: Jyri Sarha <jsarha@ti.com>
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License
 10 * version 2 as published by the Free Software Foundation.
 11 *
 12 * This program is distributed in the hope that it will be useful, but
 13 * WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 15 * General Public License for more details.
 16 */
 17
 18#ifndef __HDMI_CODEC_H__
 19#define __HDMI_CODEC_H__
 20
 21#include <linux/hdmi.h>
 22#include <drm/drm_edid.h>
 23#include <sound/asoundef.h>
 24#include <uapi/sound/asound.h>
 25
 26/*
 27 * Protocol between ASoC cpu-dai and HDMI-encoder
 28 */
 29struct hdmi_codec_daifmt {
 30	enum {
 31		HDMI_I2S,
 32		HDMI_RIGHT_J,
 33		HDMI_LEFT_J,
 34		HDMI_DSP_A,
 35		HDMI_DSP_B,
 36		HDMI_AC97,
 37		HDMI_SPDIF,
 38	} fmt;
 39	unsigned int bit_clk_inv:1;
 40	unsigned int frame_clk_inv:1;
 41	unsigned int bit_clk_master:1;
 42	unsigned int frame_clk_master:1;
 43};
 44
 45/*
 46 * HDMI audio parameters
 47 */
 48struct hdmi_codec_params {
 49	struct hdmi_audio_infoframe cea;
 50	struct snd_aes_iec958 iec;
 51	int sample_rate;
 52	int sample_width;
 53	int channels;
 54};
 55
 56struct hdmi_codec_pdata;
 57struct hdmi_codec_ops {
 58	/*
 59	 * Called when ASoC starts an audio stream setup.
 60	 * Optional
 61	 */
 62	int (*audio_startup)(struct device *dev, void *data);
 63
 64	/*
 65	 * Configures HDMI-encoder for audio stream.
 66	 * Mandatory
 67	 */
 68	int (*hw_params)(struct device *dev, void *data,
 69			 struct hdmi_codec_daifmt *fmt,
 70			 struct hdmi_codec_params *hparms);
 71
 72	/*
 73	 * Shuts down the audio stream.
 74	 * Mandatory
 75	 */
 76	void (*audio_shutdown)(struct device *dev, void *data);
 77
 78	/*
 79	 * Mute/unmute HDMI audio stream.
 80	 * Optional
 81	 */
 82	int (*digital_mute)(struct device *dev, void *data, bool enable);
 83
 84	/*
 85	 * Provides EDID-Like-Data from connected HDMI device.
 86	 * Optional
 87	 */
 88	int (*get_eld)(struct device *dev, void *data,
 89		       uint8_t *buf, size_t len);
 90};
 91
 92/* HDMI codec initalization data */
 93struct hdmi_codec_pdata {
 94	const struct hdmi_codec_ops *ops;
 95	uint i2s:1;
 96	uint spdif:1;
 97	int max_i2s_channels;
 98	void *data;
 99};
100
101#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
102
103#endif /* __HDMI_CODEC_H__ */