linux-kernel - Re: 2.6.28-rc regression: digital audio inactive after resume from suspend

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Date:	Tue, 25 Nov 2008 08:15:36 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Tino Keitel <tino.keitel@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.28-rc regression: digital audio inactive after resume from	suspend

At Tue, 25 Nov 2008 08:03:12 +0100,
Tino Keitel wrote:
> 
> On Tue, Nov 25, 2008 at 00:10:14 +0100, Takashi Iwai wrote:
> > At Mon, 24 Nov 2008 22:22:25 +0100,
> > Tino Keitel wrote:
> > > 
> > > Hi,
> > > 
> > > the digital audio out (optical) is inactive (no red light, and
> > > therefore silent) after resume from suspend on my Mac mini Core Duo.
> > > When I disable and enable the IEC958 toggle, it works again.
> > > 
> > > This didn't happen with 2.6.27. Currently, I use 2.6.28-rc6 as of
> > > commit ged31348.
> > > 
> > > This is the hardware in lspci:
> > > 
> > > 00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family)
> > > High Definition Audio Controller [8086:27d8] (rev 02)
> > > 	Subsystem: Sigmatel Device [8384:7680]
> > > 	Flags: bus master, fast devsel, latency 0, IRQ 22
> > > 	Memory at 90440000 (64-bit, non-prefetchable) [size=16K]
> > > 	Capabilities: <access denied>
> > > 	Kernel driver in use: HDA Intel
> > > 	Kernel modules: snd-hda-intel
> > > 
> > > The dmesg output with 2.6.27 and 2.6.28-rc are here:
> > > 
> > > http://tikei.de/dmesg_2.6.27.5
> > > http://tikei.de/dmesg_2.6.28-rc6
> > 
> > Could you run alsa-info.sh with --no-upload option on both kernels
> > and attach the generated files?  The script is found at
> >     http://www.alsa-project.org/alsa-info.sh
> 
> http://tikei.de/alsa-info-2.6.27.5.txt
> http://tikei.de/alsa-info-2.6.28-broken.txt
> http://tikei.de/alsa-info-2.6.28-fixed.txt (here I unchecked/rechecked
> the IEC958 toggle)

Could you try the patch below?


thanks,

Takashi

---
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index ba1ab73..eb91641 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1436,12 +1436,12 @@ static void set_dig_out(struct hda_codec *codec, hda_nid_t nid,
 {
 	hda_nid_t *d;
 
-	snd_hda_codec_write(codec, nid, 0, verb, val);
+	snd_hda_codec_write_cache(codec, nid, 0, verb, val);
 	d = codec->slave_dig_outs;
 	if (!d)
 		return;
 	for (; *d; d++)
-		snd_hda_codec_write(codec, *d, 0, verb, val);
+		snd_hda_codec_write_cache(codec, *d, 0, verb, val);
 }
 
 static inline void set_dig_out_convert(struct hda_codec *codec, hda_nid_t nid,
--
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