[alsa-devel] [PATCH] Re: iec958 switch uneffective while playing ac3 stream

Dominique Dumont domi.dumont at free.fr
Mon Apr 9 14:53:31 CEST 2007

Takashi Iwai <tiwai at suse.de> writes:

> OK, now it's on HG tree.

Could you also include the following patch that trace verbs sent to
the codec and the responses?

These traces were invaluable to figure out what was going on when I
hunted for the spdif bug. I believe it will also be valuable if people
have to look for other hda bugs.


Signed-off by: Dominique Dumont <domi.dumont at free.fr>

diff -r 42321871a7dc pci/hda/hda_codec.c
--- a/pci/hda/hda_codec.c	Thu Apr 05 17:08:57 2007 +0200
+++ b/pci/hda/hda_codec.c	Mon Apr 09 14:17:55 2007 +0200
@@ -87,6 +87,9 @@ unsigned int snd_hda_codec_read(struct h
 		res = (unsigned int)-1;
+	snd_printdd(KERN_INFO
+		    "hda_intel codec read: nid %x direct %x verb %x parm %x -> %x\n",
+		    nid, direct, verb, parm, res) ;
 	return res;
@@ -108,6 +111,9 @@ int snd_hda_codec_write(struct hda_codec
 			 unsigned int verb, unsigned int parm)
 	int err;
+	snd_printdd(KERN_INFO
+		    "hda_intel codec write: nid %x direct %x verb %x parm %x\n",
+		    nid, direct, verb, parm) ;
 	err = codec->bus->ops.command(codec, nid, direct, verb, parm);

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