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[ALSA] hda-codec - rewrite amp cache more generic

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Rewrite the code to handle amp cache and hash tables to be more
generic.  This routine will be used by the register caches in the
next patch.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai
2007-08-10 16:59:39 +02:00
committed by Jaroslav Kysela
parent 45cffef1ff
commit 01751f54ff
2 changed files with 68 additions and 45 deletions
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24
sound/pci/hda/hda_codec.h
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@@ -480,12 +480,24 @@ struct hda_codec_ops {
};
/* record for amp information cache */
struct hda_amp_info {
struct hda_cache_head {
u32 key; /* hash key */
u16 val; /* assigned value */
u16 next; /* next link; -1 = terminal */
};
struct hda_amp_info {
struct hda_cache_head head;
u32 amp_caps; /* amp capabilities */
u16 vol[2]; /* current volume & mute */
u16 status; /* update flag */
u16 next; /* next link */
};
struct hda_cache_rec {
u16 hash[64]; /* hash table for index */
unsigned int num_entries; /* number of assigned entries */
unsigned int size; /* allocated size */
unsigned int record_size; /* record size (including header) */
void *buffer; /* hash table entries */
};
/* PCM callbacks */
@@ -557,11 +569,7 @@ struct hda_codec {
hda_nid_t start_nid;
u32 *wcaps;
/* hash for amp access */
u16 amp_hash[32];
int num_amp_entries;
int amp_info_size;
struct hda_amp_info *amp_info;
struct hda_cache_rec amp_cache; /* cache for amp access */
struct mutex spdif_mutex;
unsigned int spdif_status; /* IEC958 status bits */