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/hdmi.h> 22 #include <drm/drm_edid.h> 23 #include <sound/asoundef.h> 24 #include <uapi/sound/asound.h> 25 26 /* 27 * Protocol between ASoC cpu-dai and HDMI-encoder 28 */ 29 struct hdmi_codec_daifmt { 30 enum { 31 HDMI_I2S, 32 HDMI_RIGHT_J, 33 HDMI_LEFT_J, 34 HDMI_DSP_A, 35 HDMI_DSP_B, 36 HDMI_AC97, 37 HDMI_SPDIF, 38 } fmt; 39 int bit_clk_inv:1; 40 int frame_clk_inv:1; 41 int bit_clk_master:1; 42 int frame_clk_master:1; 43 }; 44 45 /* 46 * HDMI audio parameters 47 */ 48 struct hdmi_codec_params { 49 struct hdmi_audio_infoframe cea; 50 struct snd_aes_iec958 iec; 51 int sample_rate; 52 int sample_width; 53 int channels; 54 }; 55 56 struct hdmi_codec_ops { 57 /* 58 * Called when ASoC starts an audio stream setup. 59 * Optional 60 */ 61 int (*audio_startup)(struct device *dev); 62 63 /* 64 * Configures HDMI-encoder for audio stream. 65 * Mandatory 66 */ 67 int (*hw_params)(struct device *dev, 68 struct hdmi_codec_daifmt *fmt, 69 struct hdmi_codec_params *hparms); 70 71 /* 72 * Shuts down the audio stream. 73 * Mandatory 74 */ 75 void (*audio_shutdown)(struct device *dev); 76 77 /* 78 * Mute/unmute HDMI audio stream. 79 * Optional 80 */ 81 int (*digital_mute)(struct device *dev, bool enable); 82 83 /* 84 * Provides EDID-Like-Data from connected HDMI device. 85 * Optional 86 */ 87 int (*get_eld)(struct device *dev, uint8_t *buf, size_t len); 88 }; 89 90 /* HDMI codec initalization data */ 91 struct hdmi_codec_pdata { 92 const struct hdmi_codec_ops *ops; 93 uint i2s:1; 94 uint spdif:1; 95 int max_i2s_channels; 96 }; 97 98 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec" 99 100 #endif /* __HDMI_CODEC_H__ */ 101