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/of_graph.h>
 22#include <linux/hdmi.h>
 23#include <drm/drm_edid.h>
 24#include <sound/asoundef.h>
 25#include <sound/soc.h>
 26#include <uapi/sound/asound.h>
 27
 28/*
 29 * Protocol between ASoC cpu-dai and HDMI-encoder
 30 */
 31struct hdmi_codec_daifmt {
 32	enum {
 33		HDMI_I2S,
 34		HDMI_RIGHT_J,
 35		HDMI_LEFT_J,
 36		HDMI_DSP_A,
 37		HDMI_DSP_B,
 38		HDMI_AC97,
 39		HDMI_SPDIF,
 40	} fmt;
 41	unsigned int bit_clk_inv:1;
 42	unsigned int frame_clk_inv:1;
 43	unsigned int bit_clk_master:1;
 44	unsigned int frame_clk_master:1;
 45};
 46
 47/*
 48 * HDMI audio parameters
 49 */
 50struct hdmi_codec_params {
 51	struct hdmi_audio_infoframe cea;
 52	struct snd_aes_iec958 iec;
 53	int sample_rate;
 54	int sample_width;
 55	int channels;
 56};
 57
 58struct hdmi_codec_pdata;
 59struct hdmi_codec_ops {
 60	/*
 61	 * Called when ASoC starts an audio stream setup.
 62	 * Optional
 63	 */
 64	int (*audio_startup)(struct device *dev, void *data);
 65
 66	/*
 67	 * Configures HDMI-encoder for audio stream.
 68	 * Mandatory
 69	 */
 70	int (*hw_params)(struct device *dev, void *data,
 71			 struct hdmi_codec_daifmt *fmt,
 72			 struct hdmi_codec_params *hparms);
 73
 74	/*
 75	 * Shuts down the audio stream.
 76	 * Mandatory
 77	 */
 78	void (*audio_shutdown)(struct device *dev, void *data);
 79
 80	/*
 81	 * Mute/unmute HDMI audio stream.
 82	 * Optional
 83	 */
 84	int (*digital_mute)(struct device *dev, void *data, bool enable);
 85
 86	/*
 87	 * Provides EDID-Like-Data from connected HDMI device.
 88	 * Optional
 89	 */
 90	int (*get_eld)(struct device *dev, void *data,
 91		       uint8_t *buf, size_t len);
 92
 93	/*
 94	 * Getting DAI ID
 95	 * Optional
 96	 */
 97	int (*get_dai_id)(struct snd_soc_component *comment,
 98			  struct device_node *endpoint);
 99};
100
101/* HDMI codec initalization data */
102struct hdmi_codec_pdata {
103	const struct hdmi_codec_ops *ops;
104	uint i2s:1;
105	uint spdif:1;
106	int max_i2s_channels;
107	void *data;
108};
109
110#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
111
112#endif /* __HDMI_CODEC_H__ */