1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * For multichannel support
4  */
5 
6 #ifndef __SOUND_HDA_CHMAP_H
7 #define __SOUND_HDA_CHMAP_H
8 
9 #include <sound/pcm.h>
10 #include <sound/hdaudio.h>
11 
12 
13 #define SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE 80
14 
15 struct hdac_cea_channel_speaker_allocation {
16 	int ca_index;
17 	int speakers[8];
18 
19 	/* derived values, just for convenience */
20 	int channels;
21 	int spk_mask;
22 };
23 struct hdac_chmap;
24 
25 struct hdac_chmap_ops {
26 	/*
27 	 * Helpers for producing the channel map TLVs. These can be overridden
28 	 * for devices that have non-standard mapping requirements.
29 	 */
30 	int (*chmap_cea_alloc_validate_get_type)(struct hdac_chmap *chmap,
31 		struct hdac_cea_channel_speaker_allocation *cap, int channels);
32 	void (*cea_alloc_to_tlv_chmap)(struct hdac_chmap *hchmap,
33 		struct hdac_cea_channel_speaker_allocation *cap,
34 		unsigned int *chmap, int channels);
35 
36 	/* check that the user-given chmap is supported */
37 	int (*chmap_validate)(struct hdac_chmap *hchmap, int ca,
38 			int channels, unsigned char *chmap);
39 
40 	int (*get_spk_alloc)(struct hdac_device *hdac, int pcm_idx);
41 
42 	void (*get_chmap)(struct hdac_device *hdac, int pcm_idx,
43 					unsigned char *chmap);
44 	void (*set_chmap)(struct hdac_device *hdac, int pcm_idx,
45 			unsigned char *chmap, int prepared);
46 	bool (*is_pcm_attached)(struct hdac_device *hdac, int pcm_idx);
47 
48 	/* get and set channel assigned to each HDMI ASP (audio sample packet) slot */
49 	int (*pin_get_slot_channel)(struct hdac_device *codec,
50 			hda_nid_t pin_nid, int asp_slot);
51 	int (*pin_set_slot_channel)(struct hdac_device *codec,
52 			hda_nid_t pin_nid, int asp_slot, int channel);
53 	void (*set_channel_count)(struct hdac_device *codec,
54 				hda_nid_t cvt_nid, int chs);
55 };
56 
57 struct hdac_chmap {
58 	unsigned int channels_max; /* max over all cvts */
59 	struct hdac_chmap_ops ops;
60 	struct hdac_device *hdac;
61 };
62 
63 void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
64 				struct hdac_chmap *chmap);
65 int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
66 			int channels, bool chmap_set,
67 			bool non_pcm, unsigned char *map);
68 int snd_hdac_get_active_channels(int ca);
69 void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap,
70 		       hda_nid_t pin_nid, bool non_pcm, int ca,
71 		       int channels, unsigned char *map,
72 		       bool chmap_set);
73 void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen);
74 struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca);
75 int snd_hdac_chmap_to_spk_mask(unsigned char c);
76 int snd_hdac_spk_to_chmap(int spk);
77 int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
78 				struct hdac_chmap *chmap);
79 #endif /* __SOUND_HDA_CHMAP_H */
80