* ANNOUNCE: NVIDIA HDMI audio documentation
@ 2011-02-03 22:37 Stephen Warren
2011-02-05 20:05 ` Anssi Hannula
0 siblings, 1 reply; 5+ messages in thread
From: Stephen Warren @ 2011-02-03 22:37 UTC (permalink / raw)
To: alsa-devel
I have written a document re: how to understand and trouble-shoot issues
with audio-over-HDMI on NVIDIA GPUs. It's available at:
ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html
The intent is to provide all the support information I've given various
people on support forums in a centralized place.
Hope this helps!
--
nvpublic
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ANNOUNCE: NVIDIA HDMI audio documentation
2011-02-03 22:37 ANNOUNCE: NVIDIA HDMI audio documentation Stephen Warren
@ 2011-02-05 20:05 ` Anssi Hannula
2011-02-07 17:39 ` Stephen Warren
0 siblings, 1 reply; 5+ messages in thread
From: Anssi Hannula @ 2011-02-05 20:05 UTC (permalink / raw)
To: Stephen Warren; +Cc: alsa-devel
On 04.02.2011 00:37, Stephen Warren wrote:
> I have written a document re: how to understand and trouble-shoot issues
> with audio-over-HDMI on NVIDIA GPUs. It's available at:
>
> ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html
>
> The intent is to provide all the support information I've given various
> people on support forums in a centralized place.
>
> Hope this helps!
A nice document, thanks :)
A couple of comments:
> Early chipsets (ION an earlier) do not support PD or ELD information. In
> this case, the ALSA driver assumes that a monitor is always attached,
> and supports "basic audio” (stereo 16-bit PCM only).
The ALSA driver actually assumes that the monitor supports everything.
> 10.3. Under-Enumeration of Logical Devices
This section misses one patch:
http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=e6d5dcf1f625984605d362338d71162de45a6c60
> 12.4. Verify Your ELD Is Valid
This section has "44100 48000 88200" multiple times. Maybe one should
mention that those are currently shown incorrectly (as per "[alsa-devel]
HDA - hdmi_show_short_audio_desc puts wrong rates in eld#N"). Maybe also
in chapter 10, though it is a very minor issue (it just affects the
display, not the actual used values).
--
Anssi Hannula
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ANNOUNCE: NVIDIA HDMI audio documentation
2011-02-05 20:05 ` Anssi Hannula
@ 2011-02-07 17:39 ` Stephen Warren
2011-02-07 20:49 ` Anssi Hannula
0 siblings, 1 reply; 5+ messages in thread
From: Stephen Warren @ 2011-02-07 17:39 UTC (permalink / raw)
To: Anssi Hannula; +Cc: alsa-devel
Anssi Hannula wrote:
> On 04.02.2011 00:37, Stephen Warren wrote:
> > I have written a document re: how to understand and trouble-shoot issues
> > with audio-over-HDMI on NVIDIA GPUs. It's available at:
> >
> > ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html
>
> A nice document, thanks :)
>
> A couple of comments:
Thanks very much for the feedback.
>...
> > 12.4. Verify Your ELD Is Valid
>
> This section has "44100 48000 88200" multiple times.
I'm having trouble finding this. Can you quote a bit more text to highlight
exactly where/what the problem is?
> Maybe one should mention that those are currently shown incorrectly (as
> per "[alsa-devel] HDA - hdmi_show_short_audio_desc puts wrong rates in
> eld#N").
Am I correct that this isn't patched yet? I couldn't see anything that
touched this in the git log, nor any following to this email:
http://mailman.alsa-project.org/pipermail/alsa-devel/2011-January/035557.html
Thanks again.
--
nvpublic
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ANNOUNCE: NVIDIA HDMI audio documentation
2011-02-07 17:39 ` Stephen Warren
@ 2011-02-07 20:49 ` Anssi Hannula
2011-02-07 20:53 ` Stephen Warren
0 siblings, 1 reply; 5+ messages in thread
From: Anssi Hannula @ 2011-02-07 20:49 UTC (permalink / raw)
To: Stephen Warren; +Cc: alsa-devel
On 07.02.2011 19:39, Stephen Warren wrote:
> Anssi Hannula wrote:
>> On 04.02.2011 00:37, Stephen Warren wrote:
>>> I have written a document re: how to understand and trouble-shoot issues
>>> with audio-over-HDMI on NVIDIA GPUs. It's available at:
>>>
>>> ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html
>>
>> A nice document, thanks :)
>>
>> A couple of comments:
>
> Thanks very much for the feedback.
>
>> ...
>>> 12.4. Verify Your ELD Is Valid
>>
>> This section has "44100 48000 88200" multiple times.
>
> I'm having trouble finding this. Can you quote a bit more text to highlight
> exactly where/what the problem is?
The examples have:
> sad0_rates [0xe0] 44100 48000 88200
> HDMI: supports coding type LPCM: channels = 2, rates = 44100 48000 88200, bits = 16 20
While you are not claiming they are correct, it would probably be best
to mention that in the text (and/or in the issues chapter).
>> Maybe one should mention that those are currently shown incorrectly (as
>> per "[alsa-devel] HDA - hdmi_show_short_audio_desc puts wrong rates in
>> eld#N").
>
> Am I correct that this isn't patched yet? I couldn't see anything that
> touched this in the git log, nor any following to this email:
>
> http://mailman.alsa-project.org/pipermail/alsa-devel/2011-January/035557.html
Yes, the issue is not yet fixed.
I planned to provide a patch but I haven't had the time to do it yet
after all.
> Thanks again.
--
Anssi Hannula
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ANNOUNCE: NVIDIA HDMI audio documentation
2011-02-07 20:49 ` Anssi Hannula
@ 2011-02-07 20:53 ` Stephen Warren
0 siblings, 0 replies; 5+ messages in thread
From: Stephen Warren @ 2011-02-07 20:53 UTC (permalink / raw)
To: Anssi Hannula; +Cc: alsa-devel
Anssi Hannula wrote at Monday, February 07, 2011 1:49 PM:
> On 07.02.2011 19:39, Stephen Warren wrote:
> > Anssi Hannula wrote:
> >> On 04.02.2011 00:37, Stephen Warren wrote:
> >> ...
> >>> 12.4. Verify Your ELD Is Valid
> >>
> >> This section has "44100 48000 88200" multiple times.
> >
> > I'm having trouble finding this. Can you quote a bit more text to
> > highlight exactly where/what the problem is?
>
> The examples have:
> > sad0_rates [0xe0] 44100 48000 88200
> > HDMI: supports coding type LPCM: channels = 2, rates = 44100 48000 88200, bits = 16 20
Ah! Now that I read this again, I see what you mean:
I thought you mean the text was incorrectly duplicated. You were in fact
simply pointing out the fact that the text you quoted (which happens to
appear a couple of times) was wrong due to the issue with rate printing.
Thanks.
--
nvpublic
^ permalink raw reply [flat|nested] 5+ messages in thread
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2011-02-03 22:37 ANNOUNCE: NVIDIA HDMI audio documentation Stephen Warren
2011-02-05 20:05 ` Anssi Hannula
2011-02-07 17:39 ` Stephen Warren
2011-02-07 20:49 ` Anssi Hannula
2011-02-07 20:53 ` Stephen Warren
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