pcm_drm_eld.h

 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