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authorTakashi Iwai <tiwai@suse.de>2015-10-16 11:35:49 +0200
committerTakashi Iwai <tiwai@suse.de>2015-10-20 10:14:59 +0200
commit4f9e0c38c5e991e2d050d13e28be74b93ab704c0 (patch)
tree8dad6f02e47df1690f97cadf778220079b3324b1
parentda23ac1e40ce844d1a9553906bdacce160af76f6 (diff)
downloadlinux-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.h1
-rw-r--r--sound/hda/hdac_device.c15
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