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| author | Takashi Iwai <tiwai@suse.de> | 2015-10-16 11:35:49 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-10-20 10:14:59 +0200 |
| commit | 4f9e0c38c5e991e2d050d13e28be74b93ab704c0 (patch) | |
| tree | 8dad6f02e47df1690f97cadf778220079b3324b1 | |
| parent | da23ac1e40ce844d1a9553906bdacce160af76f6 (diff) | |
| download | linux-4f9e0c38c5e991e2d050d13e28be74b93ab704c0.tar.bz2 | |
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>
| -rw-r--r-- | include/sound/hdaudio.h | 1 | ||||
| -rw-r--r-- | sound/hda/hdac_device.c | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index ddca48eb02e0..e2b712c90d3f 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -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); diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index 4b06b26cee06..bbdb25f5bbb9 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -186,6 +186,21 @@ 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 * @codec: the codec object |