linux-kernel - Re: [BUG] [REGRESSION] [BISECTED] -rc1 breaks audio over HDMI for i915

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Date:	Wed, 10 Feb 2016 18:21:11 +0100
From:	Martin Kepplinger <martink@...teo.de>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	david.henningsson@...onical.com, han.lu@...el.com,
	libin.yang@...el.com, treding@...dia.com, perex@...ex.cz,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [BUG] [REGRESSION] [BISECTED] -rc1 breaks audio over HDMI for
 i915

Am 2016-02-09 um 12:44 schrieb Takashi Iwai:
> On Tue, 09 Feb 2016 07:34:48 +0100,
> Martin Kepplinger wrote:
>>
>> The following change:
>>
>> 788d441 ALSA: hda - Use component ops for i915 HDMI/DP audio jack handling
>>
>> breaks audio over HDMI on my snd_hda_intel laptop. It is the first bad
>> commit.
>>
>> This was merged for -rc1 and isn't fixed until now, so I got nervous.
>> There are
>> no errors in the log that stand out. I'm no sound or alsa developer, and
>> just reverting it isn't easy since there is stuff depending on this.
>>
>> I'm happy to test possible fixes and hope v4.5 not to ship with such a big
>> regression ;)
> 
> Could you give a bit more detail about your hardware?  At best, give
> alsa-info.sh output (run with --no-upload option).  Also, give the
> output of dmesg, too.
> 
> In addition, what shows /proc/asound/card*/eld#*.* files?  Does any of
> it show the proper connection state and ELD?

alsa-info and dmesg are appended, and

root@...top:/home/martin/dev# cat /proc/asound/card*/eld#*
monitor_present		0
eld_valid		0


> 
> A simple revert of the commit is a patch like below.  Does it make the
> HDMI audio working again?
> 

It does! Everything back to normal in this case. Any idea for a proper
fix? Again, I'm happy to test.

                        martin


> 
> thanks,
> 
> Takashi
> 
> ---
> --- a/sound/pci/hda/patch_hdmi.c
> +++ b/sound/pci/hda/patch_hdmi.c
> @@ -156,7 +156,7 @@ struct hdmi_spec {
>  	bool i915_bound; /* was i915 bound in this driver? */
>  };
>  
> -#ifdef CONFIG_SND_HDA_I915
> +#if 0
>  #define codec_has_acomp(codec) \
>  	((codec)->bus->core.audio_component != NULL)
>  #else
> 


View attachment "alsa-info.txt.rQKXSZTTfT" of type "text/plain" (29370 bytes)

View attachment "dmesg.txt" of type "text/plain" (70191 bytes)