diff options
| author | Takashi Iwai <tiwai@suse.de> | 2009-03-23 13:07:47 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-03-23 13:08:33 +0100 |
| commit | 1327a32b878b5ed2113c63557b6f4f949f821857 (patch) | |
| tree | 25b47d63e8cc68840134120fc49e4fa499f54569 /sound/pci/hda/hda_codec.c | |
| parent | ALSA: hda - Avoid output amp manipulation to digital mic pins (diff) | |
| download | linux-1327a32b878b5ed2113c63557b6f4f949f821857.tar.xz linux-1327a32b878b5ed2113c63557b6f4f949f821857.zip | |
ALSA: hda - Cache pin-cap values
Added snd_hda_query_pin_caps() to read and cache pin-cap values
to avoid too frequently issuing the same verbs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_codec.c')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 1b5575ecb0a4..0f70d2d102e0 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1052,6 +1052,7 @@ EXPORT_SYMBOL_HDA(snd_hda_codec_cleanup_stream); /* FIXME: more better hash key? */ #define HDA_HASH_KEY(nid,dir,idx) (u32)((nid) + ((idx) << 16) + ((dir) << 24)) +#define HDA_HASH_PINCAP_KEY(nid) (u32)((nid) + (0x02 << 24)) #define INFO_AMP_CAPS (1<<0) #define INFO_AMP_VOL(ch) (1 << (1 + (ch))) @@ -1142,6 +1143,21 @@ int snd_hda_override_amp_caps(struct hda_codec *codec, hda_nid_t nid, int dir, } EXPORT_SYMBOL_HDA(snd_hda_override_amp_caps); +u32 snd_hda_query_pin_caps(struct hda_codec *codec, hda_nid_t nid) +{ + struct hda_amp_info *info; + + info = get_alloc_amp_hash(codec, HDA_HASH_PINCAP_KEY(nid)); + if (!info) + return 0; + if (!info->head.val) { + info->amp_caps = snd_hda_param_read(codec, nid, AC_PAR_PIN_CAP); + info->head.val |= INFO_AMP_CAPS; + } + return info->amp_caps; +} +EXPORT_SYMBOL_HDA(snd_hda_query_pin_caps); + /* * read the current volume to info * if the cache exists, read the cache value. |