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ALSA: hda - Make CONFIG_SND_HDA_RECONFIG for codec reconfiguration

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Make the codec re-configuration feature selectable via Kconfig,
CONFIG_SND_HDA_RECONFIG.
Also mark it as experimental (as it really is).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2008-11-21 09:26:20 +01:00
parent f208dba97f
commit e7ee058cac
3 changed files with 22 additions and 1 deletions
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9
sound/pci/Kconfig
View File

@ -518,6 +518,15 @@ config SND_HDA_HWDEP
This interface can be used for out-of-band communication
with codecs for debugging purposes.
config SND_HDA_RECONFIG
bool "Allow dynamic codec reconfiguration (EXPERIMENTAL)"
depends on SND_HDA_HWDEP && EXPERIMENTAL
help
Say Y here to enable the HD-audio codec re-configuration feature.
This adds the sysfs interfaces to allow user to clear the whole
codec configuration, change the codec setup, add extra verbs,
and re-configure the codec dynamically.
config SND_HDA_INPUT_BEEP
bool "Support digital beep via input layer"
depends on SND_HDA_INTEL

4
sound/pci/hda/hda_hwdep.c
View File

@ -145,6 +145,8 @@ int __devinit snd_hda_create_hwdep(struct hda_codec *codec)
return 0;
}
#ifdef CONFIG_SND_HDA_RECONFIG
/*
* sysfs interface
*/
@ -347,3 +349,5 @@ int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
hwdep->device, &codec_attrs[i]);
return 0;
}
#endif /* CONFIG_SND_HDA_RECONFIG */

10
sound/pci/hda/hda_local.h
View File

@ -409,11 +409,19 @@ void snd_hda_ctls_clear(struct hda_codec *codec);
*/
#ifdef CONFIG_SND_HDA_HWDEP
int snd_hda_create_hwdep(struct hda_codec *codec);
int snd_hda_hwdep_add_sysfs(struct hda_codec *codec);
#else
static inline int snd_hda_create_hwdep(struct hda_codec *codec) { return 0; }
#endif
#ifdef CONFIG_SND_HDA_RECONFIG
int snd_hda_hwdep_add_sysfs(struct hda_codec *codec);
#else
static inline int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
{
return 0;
}
#endif
/*
* power-management
*/