blob: 915c4357945c27992aa3b7561ab705dedff082ad [file] [log] [blame]
Jyri Sarha09184112016-03-31 16:36:00 +03001/*
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 */
29struct 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;
Takashi Sakamotof9cf7762016-12-16 18:26:54 +090039 unsigned int bit_clk_inv:1;
40 unsigned int frame_clk_inv:1;
41 unsigned int bit_clk_master:1;
42 unsigned int frame_clk_master:1;
Jyri Sarha09184112016-03-31 16:36:00 +030043};
44
45/*
46 * HDMI audio parameters
47 */
48struct 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
Kuninori Morimotoefc91942016-06-24 02:47:55 +000056struct hdmi_codec_pdata;
Jyri Sarha09184112016-03-31 16:36:00 +030057struct hdmi_codec_ops {
58 /*
59 * Called when ASoC starts an audio stream setup.
60 * Optional
61 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000062 int (*audio_startup)(struct device *dev, void *data);
Jyri Sarha09184112016-03-31 16:36:00 +030063
64 /*
65 * Configures HDMI-encoder for audio stream.
66 * Mandatory
67 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000068 int (*hw_params)(struct device *dev, void *data,
Jyri Sarha09184112016-03-31 16:36:00 +030069 struct hdmi_codec_daifmt *fmt,
70 struct hdmi_codec_params *hparms);
71
72 /*
73 * Shuts down the audio stream.
74 * Mandatory
75 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000076 void (*audio_shutdown)(struct device *dev, void *data);
Jyri Sarha09184112016-03-31 16:36:00 +030077
78 /*
79 * Mute/unmute HDMI audio stream.
80 * Optional
81 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000082 int (*digital_mute)(struct device *dev, void *data, bool enable);
Jyri Sarha09184112016-03-31 16:36:00 +030083
84 /*
85 * Provides EDID-Like-Data from connected HDMI device.
86 * Optional
87 */
Kuninori Morimotoefc91942016-06-24 02:47:55 +000088 int (*get_eld)(struct device *dev, void *data,
89 uint8_t *buf, size_t len);
Jyri Sarha09184112016-03-31 16:36:00 +030090};
91
92/* HDMI codec initalization data */
93struct hdmi_codec_pdata {
94 const struct hdmi_codec_ops *ops;
95 uint i2s:1;
96 uint spdif:1;
97 int max_i2s_channels;
Kuninori Morimotoefc91942016-06-24 02:47:55 +000098 void *data;
Jyri Sarha09184112016-03-31 16:36:00 +030099};
100
101#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
102
103#endif /* __HDMI_CODEC_H__ */