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 */ 31 struct 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 */ 50 struct 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 58 struct hdmi_codec_pdata; 59 struct 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 */ 102 struct 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__ */ 113