1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * hdmi-codec.h - HDMI Codec driver API
  4 *
  5 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
  6 *
  7 * Author: Jyri Sarha <jsarha@ti.com>
  8 */
  9
 10#ifndef __HDMI_CODEC_H__
 11#define __HDMI_CODEC_H__
 12
 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>
 19
 20/*
 21 * Protocol between ASoC cpu-dai and HDMI-encoder
 22 */
 23struct hdmi_codec_daifmt {
 24	enum {
 25		HDMI_I2S,
 26		HDMI_RIGHT_J,
 27		HDMI_LEFT_J,
 28		HDMI_DSP_A,
 29		HDMI_DSP_B,
 30		HDMI_AC97,
 31		HDMI_SPDIF,
 32	} fmt;
 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};
 38
 39/*
 40 * HDMI audio parameters
 41 */
 42struct hdmi_codec_params {
 43	struct hdmi_audio_infoframe cea;
 44	struct snd_aes_iec958 iec;
 45	int sample_rate;
 46	int sample_width;
 47	int channels;
 48};
 49
 50typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
 51				      bool plugged);
 52
 53struct hdmi_codec_pdata;
 54struct hdmi_codec_ops {
 55	/*
 56	 * Called when ASoC starts an audio stream setup.
 57	 * Optional
 58	 */
 59	int (*audio_startup)(struct device *dev, void *data);
 60
 61	/*
 62	 * Configures HDMI-encoder for audio stream.
 63	 * Mandatory
 64	 */
 65	int (*hw_params)(struct device *dev, void *data,
 66			 struct hdmi_codec_daifmt *fmt,
 67			 struct hdmi_codec_params *hparms);
 68
 69	/*
 70	 * Shuts down the audio stream.
 71	 * Mandatory
 72	 */
 73	void (*audio_shutdown)(struct device *dev, void *data);
 74
 75	/*
 76	 * Mute/unmute HDMI audio stream.
 77	 * Optional
 78	 */
 79	int (*digital_mute)(struct device *dev, void *data, bool enable);
 80
 81	/*
 82	 * Provides EDID-Like-Data from connected HDMI device.
 83	 * Optional
 84	 */
 85	int (*get_eld)(struct device *dev, void *data,
 86		       uint8_t *buf, size_t len);
 87
 88	/*
 89	 * Getting DAI ID
 90	 * Optional
 91	 */
 92	int (*get_dai_id)(struct snd_soc_component *comment,
 93			  struct device_node *endpoint);
 94
 95	/*
 96	 * Hook callback function to handle connector plug event.
 97	 * Optional
 98	 */
 99	int (*hook_plugged_cb)(struct device *dev, void *data,
100			       hdmi_codec_plugged_cb fn,
101			       struct device *codec_dev);
102};
103
104/* HDMI codec initalization data */
105struct hdmi_codec_pdata {
106	const struct hdmi_codec_ops *ops;
107	uint i2s:1;
108	uint spdif:1;
109	int max_i2s_channels;
110	void *data;
111};
112
113struct snd_soc_component;
114struct snd_soc_jack;
115
116int hdmi_codec_set_jack_detect(struct snd_soc_component *component,
117			       struct snd_soc_jack *jack);
118
119#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
120
121#endif /* __HDMI_CODEC_H__ */