ALSA: hda - Support rereading widgets under the function group
A codec may allow software to hide some unused pin/cvt widgets.
Sometimes BIOS does not enable the hidden widgets properly although they are
needed for the board. Thus the driver need to enable them as a board-specific
fixup and the whole tree will change.
This patch implements a common code for rereading codec widgets. So the fixup
code can call it after enabling the hidden widgets.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 3c92514..e80f835 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1441,6 +1441,30 @@
}
EXPORT_SYMBOL_HDA(snd_hda_codec_new);
+int snd_hda_codec_update_widgets(struct hda_codec *codec)
+{
+ hda_nid_t fg;
+ int err;
+
+ /* Assume the function group node does not change,
+ * only the widget nodes may change.
+ */
+ kfree(codec->wcaps);
+ fg = codec->afg ? codec->afg : codec->mfg;
+ err = read_widget_caps(codec, fg);
+ if (err < 0) {
+ snd_printk(KERN_ERR "hda_codec: cannot malloc\n");
+ return err;
+ }
+
+ snd_array_free(&codec->init_pins);
+ err = read_pin_defaults(codec);
+
+ return err;
+}
+EXPORT_SYMBOL_HDA(snd_hda_codec_update_widgets);
+
+
/**
* snd_hda_codec_configure - (Re-)configure the HD-audio codec
* @codec: the HDA codec