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 */ 23 struct 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 */ 42 struct 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 50 typedef void (*hdmi_codec_plugged_cb)(struct device *dev, 51 bool plugged); 52 53 struct hdmi_codec_pdata; 54 struct 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 */ 105 struct 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 }; 112 113 struct snd_soc_component; 114 struct snd_soc_jack; 115 116 int 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__ */ 122