On Fri, Mar 18, 2016 at 09:10:58PM +0200, Ville Syrjälä wrote: > On Fri, Mar 18, 2016 at 07:51:43PM +0100, Takashi Iwai wrote: > > On Fri, 18 Mar 2016 18:49:19 +0100, > > Ville Syrjälä wrote: > > > > > > On Fri, Mar 18, 2016 at 03:22:15PM +0100, Takashi Iwai wrote: > > > > On Fri, 18 Mar 2016 14:54:59 +0100, > > > > Ville Syrjälä wrote: > > > > > > > > > > On Wed, Mar 16, 2016 at 04:04:20PM +0200, Ville Syrjälä wrote: > > > > > > On Tue, Mar 15, 2016 at 06:22:56PM +0100, Takashi Iwai wrote: > > > > > > > On Tue, 15 Mar 2016 17:02:07 +0100, > > > > > > > Ville Syrjälä wrote: > > > > > > > > > > > > > > > > We have a few new WARN spews from snd-hda causing some grief in i915 CI. > > > > > > > > > > > > > > > > This one happens on ILK and BYT. Looks like it happens 100% of the time on driver load: > > > > > > > > [ 18.809850] ------------[ cut here ]------------ > > > > > > > > [ 18.809866] WARNING: CPU: 0 PID: 39 at sound/hda/hdac_i915.c:129 pin2port+0x25/0x30 [snd_hda_core]() > > > > > > > > > > > > > > This is bad. Basically we had a naive assumption of the fixed mapping > > > > > > > between the port number and the HD-audio widget, but it doesn't apply > > > > > > > properly to pre-HSW models. > > > > > > > > > > > > > > The patch attached below disables the audio binding for pre-HSW > > > > > > > models. I'm going to queue to for-linus branch. > > > > > > > > > > > > That seems to eliminate the warn on my ILK. > > > > > > > > > > Apparently it was less effective on BYT. We still get this: > > > > > > > > Ouch, I forgot that Baytrail had already i915 component binding in the > > > > controller side. I assumed too naively that all old models have no > > > > binding. > > > > > > > > Below is the additional fix patch. > > > > > > Still getting blasted at least via snd_hdac_sync_audio_rate() > > > > That code path is a slightly different. This is a kind of false > > positive, but now the function checks the validity of the passed > > argument more strictly, and starts grumbling. > > > > The fix is attached below. > > > > > > Takashi > > > > -- 8< -- > > From: Takashi Iwai <tiwai@xxxxxxx> > > Subject: [PATCH] ALSA: hda - Fix spurious kernel WARNING on Baytrail HDMI > > > > snd_hdac_sync_audio_rate() call is mandatory only for HSW and later > > models, but we call the function unconditionally blindly assuming that > > the function doesn't do anything harmful. But since recently, the > > function checks the validity of the passed pin NID, and eventually > > spews the warning if an unexpected pin is passed. This is seen on old > > chips like Baytrail. > > > > The fix is to limit the call of this function again only for the chips > > with the proper binding. This can be identified by the same flag as > > the eld notifier. > > > > Reported-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Cc: <stable@xxxxxxxxxxxxxxx> # v4.5 > > Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> > > --- > > sound/pci/hda/patch_hdmi.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c > > index e7d9453ecd10..56d3575ee6cc 100644 > > --- a/sound/pci/hda/patch_hdmi.c > > +++ b/sound/pci/hda/patch_hdmi.c > > @@ -1741,7 +1741,8 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, > > > > /* Call sync_audio_rate to set the N/CTS/M manually if necessary */ > > /* Todo: add DP1.2 MST audio support later */ > > - snd_hdac_sync_audio_rate(&codec->bus->core, pin_nid, runtime->rate); > > + if (codec_has_acomp(codec)) > > + snd_hdac_sync_audio_rate(&codec->bus->core, pin_nid, runtime->rate); > > Yeah seems like it should do it. Yep, didn't see any more backtraces in the logs with this one. Tested-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Though I'm not entirely enthusiastic about maintaining two code paths > for audio stuff. So longer term I'd love to be able rip out the > hardware based ELD passing from i915 and just use the audio component > even for the oldest platforms. > > > > > non_pcm = check_non_pcm_per_cvt(codec, cvt_nid); > > mutex_lock(&per_pin->lock); > > -- > > 2.7.4 > > -- > Ville Syrjälä > Intel OTC -- Ville Syrjälä Intel OTC _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
