include/sound/hda_chmap.h

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