LXR linux/include/sound/hda

   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
  15struct 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};
  23struct hdac_chmap;
  24
  25struct 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
  57struct hdac_chmap {
  58        unsigned int channels_max; /* max over all cvts */
  59        struct hdac_chmap_ops ops;
  60        struct hdac_device *hdac;
  61};
  62
  63void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
  64                                struct hdac_chmap *chmap);
  65int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
  66                        int channels, bool chmap_set,
  67                        bool non_pcm, unsigned char *map);
  68int snd_hdac_get_active_channels(int ca);
  69void 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);
  73void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen);
  74struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca);
  75int snd_hdac_chmap_to_spk_mask(unsigned char c);
  76int snd_hdac_spk_to_chmap(int spk);
  77int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
  78                                struct hdac_chmap *chmap);
  79#endif /* __SOUND_HDA_CHMAP_H */
  80