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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * hdmi-codec.h - HDMI Codec driver API * * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com * * Author: Jyri Sarha <jsarha@ti.com> */ #ifndef __HDMI_CODEC_H__ #define __HDMI_CODEC_H__ #include <linux/of_graph.h> #include <linux/hdmi.h> #include <drm/drm_edid.h> #include <sound/asoundef.h> #include <sound/soc.h> #include <uapi/sound/asound.h> /* * Protocol between ASoC cpu-dai and HDMI-encoder */ struct hdmi_codec_daifmt { enum { HDMI_I2S, HDMI_RIGHT_J, HDMI_LEFT_J, HDMI_DSP_A, HDMI_DSP_B, HDMI_AC97, HDMI_SPDIF, } fmt; unsigned int bit_clk_inv:1; unsigned int frame_clk_inv:1; unsigned int bit_clk_provider:1; unsigned int frame_clk_provider:1; /* bit_fmt could be standard PCM format or * IEC958 encoded format. ALSA IEC958 plugin will pass * IEC958_SUBFRAME format to the underneath driver. */ snd_pcm_format_t bit_fmt; }; /* * HDMI audio parameters */ struct hdmi_codec_params { struct hdmi_audio_infoframe cea; struct snd_aes_iec958 iec; int sample_rate; int sample_width; int channels; }; typedef void (*hdmi_codec_plugged_cb)(struct device *dev, bool plugged); struct hdmi_codec_pdata; struct hdmi_codec_ops { /* * Called when ASoC starts an audio stream setup. * Optional */ int (*audio_startup)(struct device *dev, void *data); /* * Configures HDMI-encoder for audio stream. * Having either prepare or hw_params is mandatory. */ int (*hw_params)(struct device *dev, void *data, struct hdmi_codec_daifmt *fmt, struct hdmi_codec_params *hparms); /* * Configures HDMI-encoder for audio stream. Can be called * multiple times for each setup. * * Having either prepare or hw_params is mandatory. */ int (*prepare)(struct device *dev, void *data, struct hdmi_codec_daifmt *fmt, struct hdmi_codec_params *hparms); /* * Shuts down the audio stream. * Mandatory */ void (*audio_shutdown)(struct device *dev, void *data); /* * Mute/unmute HDMI audio stream. * Optional */ int (*mute_stream)(struct device *dev, void *data, bool enable, int direction); /* * Provides EDID-Like-Data from connected HDMI device. * Optional */ int (*get_eld)(struct device *dev, void *data, uint8_t *buf, size_t len); /* * Getting DAI ID * Optional */ int (*get_dai_id)(struct snd_soc_component *comment, struct device_node *endpoint); /* * Hook callback function to handle connector plug event. * Optional */ int (*hook_plugged_cb)(struct device *dev, void *data, hdmi_codec_plugged_cb fn, struct device *codec_dev); /* bit field */ unsigned int no_capture_mute:1; }; /* HDMI codec initalization data */ struct hdmi_codec_pdata { const struct hdmi_codec_ops *ops; uint i2s:1; uint spdif:1; int max_i2s_channels; void *data; }; struct snd_soc_component; struct snd_soc_jack; #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec" #endif /* __HDMI_CODEC_H__ */ |