root/include/sound/hda_chmap.h

INCLUDED FROM

   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 */