[ALSA] hda-codec - Get subsystem ID from AFG/MFG

Modules: HDA Codec driver

Get subsytem ID from AFG/MFG if not obtained from the root node.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 3815403ed095..57b5a0a83c8d 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -518,6 +518,13 @@ int snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
                 return -ENODEV;
         }
 
+        if (! codec->subsystem_id) {
+                hda_nid_t nid = codec->afg ? codec->afg : codec->mfg;
+                codec->subsystem_id = snd_hda_codec_read(codec, nid, 0,
+                                                         AC_VERB_GET_SUBSYSTEM_ID,
+                                                         0);
+        }
+
         codec->preset = find_codec_preset(codec);
         if (! *bus->card->mixername)
                 snd_hda_get_codec_name(codec, bus->card->mixername,