1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __SOUND_PCM_DRM_ELD_H
3#define __SOUND_PCM_DRM_ELD_H
4
5enum eld_versions {
6 ELD_VER_CEA_861D = 2,
7 ELD_VER_PARTIAL = 31,
8};
9
10enum cea_audio_coding_types {
11 AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
12 AUDIO_CODING_TYPE_LPCM = 1,
13 AUDIO_CODING_TYPE_AC3 = 2,
14 AUDIO_CODING_TYPE_MPEG1 = 3,
15 AUDIO_CODING_TYPE_MP3 = 4,
16 AUDIO_CODING_TYPE_MPEG2 = 5,
17 AUDIO_CODING_TYPE_AACLC = 6,
18 AUDIO_CODING_TYPE_DTS = 7,
19 AUDIO_CODING_TYPE_ATRAC = 8,
20 AUDIO_CODING_TYPE_SACD = 9,
21 AUDIO_CODING_TYPE_EAC3 = 10,
22 AUDIO_CODING_TYPE_DTS_HD = 11,
23 AUDIO_CODING_TYPE_MLP = 12,
24 AUDIO_CODING_TYPE_DST = 13,
25 AUDIO_CODING_TYPE_WMAPRO = 14,
26 AUDIO_CODING_TYPE_REF_CXT = 15,
27 /* also include valid xtypes below */
28 AUDIO_CODING_TYPE_HE_AAC = 15,
29 AUDIO_CODING_TYPE_HE_AAC2 = 16,
30 AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
31};
32
33enum cea_audio_coding_xtypes {
34 AUDIO_CODING_XTYPE_HE_REF_CT = 0,
35 AUDIO_CODING_XTYPE_HE_AAC = 1,
36 AUDIO_CODING_XTYPE_HE_AAC2 = 2,
37 AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
38 AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
39};
40
41/*
42 * CEA Short Audio Descriptor data
43 */
44struct snd_cea_sad {
45 int channels;
46 int format; /* (format == 0) indicates invalid SAD */
47 int rates;
48 int sample_bits; /* for LPCM */
49 int max_bitrate; /* for AC3...ATRAC */
50 int profile; /* for WMAPRO */
51};
52
53#define ELD_FIXED_BYTES 20
54#define ELD_MAX_SIZE 256
55#define ELD_MAX_MNL 16
56#define ELD_MAX_SAD 16
57
58#define ELD_PCM_BITS_8 BIT(0)
59#define ELD_PCM_BITS_16 BIT(1)
60#define ELD_PCM_BITS_20 BIT(2)
61#define ELD_PCM_BITS_24 BIT(3)
62#define ELD_PCM_BITS_32 BIT(4)
63
64/*
65 * ELD: EDID Like Data
66 */
67struct snd_parsed_hdmi_eld {
68 /*
69 * all fields will be cleared before updating ELD
70 */
71 int baseline_len;
72 int eld_ver;
73 int cea_edid_ver;
74 char monitor_name[ELD_MAX_MNL + 1];
75 int manufacture_id;
76 int product_id;
77 u64 port_id;
78 int support_hdcp;
79 int support_ai;
80 int conn_type;
81 int aud_synch_delay;
82 int spk_alloc;
83 int sad_count;
84 struct snd_cea_sad sad[ELD_MAX_SAD];
85};
86
87int snd_pcm_hw_constraint_eld(struct snd_pcm_runtime *runtime, void *eld);
88
89int snd_parse_eld(struct device *dev, struct snd_parsed_hdmi_eld *e,
90 const unsigned char *buf, int size);
91void snd_show_eld(struct device *dev, struct snd_parsed_hdmi_eld *e);
92
93#ifdef CONFIG_SND_PROC_FS
94void snd_print_eld_info(struct snd_parsed_hdmi_eld *eld,
95 struct snd_info_buffer *buffer);
96#endif
97
98#endif
99

source code of linux/include/sound/pcm_drm_eld.h