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 struct hdmi_codec_pdata; 51 struct 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 */ 94 struct 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