Release 4.7 include/sound/hda_chmap.h

/*
 * For multichannel support
 */

#ifndef __SOUND_HDA_CHMAP_H

#define __SOUND_HDA_CHMAP_H

#include <sound/pcm.h>
#include <sound/hdaudio.h>



#define SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE 80


struct hdac_cea_channel_speaker_allocation {
	
int ca_index;
	
int speakers[8];

	/* derived values, just for convenience */
	
int channels;
	
int spk_mask;
};
struct hdac_chmap;


struct hdac_chmap_ops {
	/*
         * Helpers for producing the channel map TLVs. These can be overridden
         * for devices that have non-standard mapping requirements.
         */
	
int (*chmap_cea_alloc_validate_get_type)(struct hdac_chmap *chmap,
		struct hdac_cea_channel_speaker_allocation *cap, int channels);
	
void (*cea_alloc_to_tlv_chmap)(struct hdac_chmap *hchmap,
		struct hdac_cea_channel_speaker_allocation *cap,
		unsigned int *chmap, int channels);

	/* check that the user-given chmap is supported */
	
int (*chmap_validate)(struct hdac_chmap *hchmap, int ca,
			int channels, unsigned char *chmap);

	
int (*get_spk_alloc)(struct hdac_device *hdac, int pcm_idx);

	
void (*get_chmap)(struct hdac_device *hdac, int pcm_idx,
					unsigned char *chmap);
	
void (*set_chmap)(struct hdac_device *hdac, int pcm_idx,
			unsigned char *chmap, int prepared);
	
bool (*is_pcm_attached)(struct hdac_device *hdac, int pcm_idx);

	/* get and set channel assigned to each HDMI ASP (audio sample packet) slot */
	
int (*pin_get_slot_channel)(struct hdac_device *codec,
			hda_nid_t pin_nid, int asp_slot);
	
int (*pin_set_slot_channel)(struct hdac_device *codec,
			hda_nid_t pin_nid, int asp_slot, int channel);
	
void (*set_channel_count)(struct hdac_device *codec,
				hda_nid_t cvt_nid, int chs);
};


struct hdac_chmap {
	
unsigned int channels_max; /* max over all cvts */
	
struct hdac_chmap_ops ops;
	
struct hdac_device *hdac;
};

void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
				struct hdac_chmap *chmap);
int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
			int channels, bool chmap_set,
			bool non_pcm, unsigned char *map);
int snd_hdac_get_active_channels(int ca);
void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap,
		       hda_nid_t pin_nid, bool non_pcm, int ca,
		       int channels, unsigned char *map,
		       bool chmap_set);
void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen);
struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca);
int snd_hdac_chmap_to_spk_mask(unsigned char c);
int snd_hdac_spk_to_chmap(int spk);
int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
				struct hdac_chmap *chmap);
#endif /* __SOUND_HDA_CHMAP_H */
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Directory: include/sound

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