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ALSA: hda - Add a common helper to give the codec modalias string 

This patch provide a new common helper function,
snd_hdac_codec_modalias(), to give the codec modalias name string.
This function will be used by multiple places in the later patches.

Reviewed-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Subhransu S Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-10-16 11:35:49 +02:00
parent da23ac1e40
commit 4f9e0c38c5
2 changed files with 16 additions and 0 deletions
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1
include/sound/hdaudio.h
View File

@ -109,6 +109,7 @@ void snd_hdac_device_exit(struct hdac_device *dev);
int snd_hdac_device_register(struct hdac_device *codec);
void snd_hdac_device_unregister(struct hdac_device *codec);
int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
int snd_hdac_refresh_widgets(struct hdac_device *codec);
int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec);

15
sound/hda/hdac_device.c
View File

@ -185,6 +185,21 @@ int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
}
EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
/**
* snd_hdac_codec_modalias - give the module alias name
* @codec: HDAC device
* @buf: string buffer to store
* @size: string buffer size
*
* Returns the size of string, like snprintf(), or a negative error code.
*/
int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
{
return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
codec->vendor_id, codec->revision_id, codec->type);
}
EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
/**
* snd_hdac_make_cmd - compose a 32bit command word to be sent to the
* HD-audio controller