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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * hdmi-codec.h - HDMI Codec driver API4 *5 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com6 *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 <sound/asoundef.h>16#include <sound/soc.h>17#include <uapi/sound/asound.h>18 19/*20 * Protocol between ASoC cpu-dai and HDMI-encoder21 */22struct hdmi_codec_daifmt {23 enum {24 HDMI_I2S,25 HDMI_RIGHT_J,26 HDMI_LEFT_J,27 HDMI_DSP_A,28 HDMI_DSP_B,29 HDMI_AC97,30 HDMI_SPDIF,31 } fmt;32 unsigned int bit_clk_inv:1;33 unsigned int frame_clk_inv:1;34 unsigned int bit_clk_provider:1;35 unsigned int frame_clk_provider:1;36 /* bit_fmt could be standard PCM format or37 * IEC958 encoded format. ALSA IEC958 plugin will pass38 * IEC958_SUBFRAME format to the underneath driver.39 */40 snd_pcm_format_t bit_fmt;41};42 43/*44 * HDMI audio parameters45 */46struct hdmi_codec_params {47 struct hdmi_audio_infoframe cea;48 struct snd_aes_iec958 iec;49 int sample_rate;50 int sample_width;51 int channels;52};53 54typedef void (*hdmi_codec_plugged_cb)(struct device *dev,55 bool plugged);56 57struct hdmi_codec_pdata;58struct hdmi_codec_ops {59 /*60 * Called when ASoC starts an audio stream setup.61 * Optional62 */63 int (*audio_startup)(struct device *dev, void *data);64 65 /*66 * Configures HDMI-encoder for audio stream.67 * Having either prepare or hw_params is mandatory.68 */69 int (*hw_params)(struct device *dev, void *data,70 struct hdmi_codec_daifmt *fmt,71 struct hdmi_codec_params *hparms);72 73 /*74 * Configures HDMI-encoder for audio stream. Can be called75 * multiple times for each setup.76 *77 * Having either prepare or hw_params is mandatory.78 */79 int (*prepare)(struct device *dev, void *data,80 struct hdmi_codec_daifmt *fmt,81 struct hdmi_codec_params *hparms);82 83 /*84 * Shuts down the audio stream.85 * Mandatory86 */87 void (*audio_shutdown)(struct device *dev, void *data);88 89 /*90 * Mute/unmute HDMI audio stream.91 * Optional92 */93 int (*mute_stream)(struct device *dev, void *data,94 bool enable, int direction);95 96 /*97 * Provides EDID-Like-Data from connected HDMI device.98 * Optional99 */100 int (*get_eld)(struct device *dev, void *data,101 uint8_t *buf, size_t len);102 103 /*104 * Getting DAI ID105 * Optional106 */107 int (*get_dai_id)(struct snd_soc_component *comment,108 struct device_node *endpoint);109 110 /*111 * Hook callback function to handle connector plug event.112 * Optional113 */114 int (*hook_plugged_cb)(struct device *dev, void *data,115 hdmi_codec_plugged_cb fn,116 struct device *codec_dev);117 118 /* bit field */119 unsigned int no_capture_mute:1;120};121 122/* HDMI codec initalization data */123struct hdmi_codec_pdata {124 const struct hdmi_codec_ops *ops;125 uint i2s:1;126 uint no_i2s_playback:1;127 uint no_i2s_capture:1;128 uint spdif:1;129 uint no_spdif_playback:1;130 uint no_spdif_capture:1;131 int max_i2s_channels;132 void *data;133};134 135struct snd_soc_component;136struct snd_soc_jack;137 138#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"139 140#endif /* __HDMI_CODEC_H__ */141