LXR linux/include/sound/hdmi-codec.h

   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
  50struct hdmi_codec_pdata;
  51struct hdmi_codec_ops {
  52        /*
  53         * Called when ASoC starts an audio stream setup.
  54         * Optional
  55         */
  56        int (*audio_startup)(struct device *dev, void *data);
  57
  58        /*
  59         * Configures HDMI-encoder for audio stream.
  60         * Mandatory
  61         */
  62        int (*hw_params)(struct device *dev, void *data,
  63                         struct hdmi_codec_daifmt *fmt,
  64                         struct hdmi_codec_params *hparms);
  65
  66        /*
  67         * Shuts down the audio stream.
  68         * Mandatory
  69         */
  70        void (*audio_shutdown)(struct device *dev, void *data);
  71
  72        /*
  73         * Mute/unmute HDMI audio stream.
  74         * Optional
  75         */
  76        int (*digital_mute)(struct device *dev, void *data, bool enable);
  77
  78        /*
  79         * Provides EDID-Like-Data from connected HDMI device.
  80         * Optional
  81         */
  82        int (*get_eld)(struct device *dev, void *data,
  83                       uint8_t *buf, size_t len);
  84
  85        /*
  86         * Getting DAI ID
  87         * Optional
  88         */
  89        int (*get_dai_id)(struct snd_soc_component *comment,
  90                          struct device_node *endpoint);
  91};
  92
  93/* HDMI codec initalization data */
  94struct hdmi_codec_pdata {
  95        const struct hdmi_codec_ops *ops;
  96        uint i2s:1;
  97        uint spdif:1;
  98        int max_i2s_channels;
  99        void *data;
 100};
 101
 102#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
 103
 104#endif /* __HDMI_CODEC_H__ */
 105