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.
Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/hdaudio.h | 1 + sound/hda/hdac_device.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+)
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