[Intel-gfx] [Alsa-user] intel-hda: sound via HDMI only when using interlaced modes

Thu Oct 10 10:36:25 CEST 2013

Ok, for the distro (OpenElec) i'm using i'll need to to re-compile the
kernel with the CONFIG_DRM_LOAD_EDID_FIRMWARE=y option so i'll try to
set up a build env later this day and hope for the best :-)

On Thu, Oct 10, 2013 at 10:27 AM, Jani Nikula
<jani.nikula at linux.intel.com> wrote:
> On Thu, 10 Oct 2013, Jani Nikula <jani.nikula at linux.intel.com> wrote:
>> On Thu, 10 Oct 2013, Jasper Smet <josbeir at gmail.com> wrote:
>>> I managed do this quickly before i got off to work:
>>>
>>> Dmesg output with directly connected to the tv: http://sprunge.us/EhJD
>>>
>>> Neither the VSX-928 nor the TV (passtrough) pick up sound when
>>> connected to the AV receiver.
>>>
>>> I noticed that when i set the resolution to 1080i at 30 sound works on
>>> the receiver but not on the TV, everything lower works fine in both
>>> passtrough and with the receiver powered on.
>>>
>>> Only when using 1080p24 or lower everything then works fine on both
>>> devices..
>>
>> At a glance, the main difference seems to be:
>>
>>  [drm:drm_detect_monitor_audio], Monitor has basic audio support
>> -[drm:drm_edid_to_eld], ELD monitor Panasonic-TV
>> +[drm:drm_edid_to_eld], ELD monitor VSX-923
>>  [drm:parse_hdmi_vsdb], HDMI: DVI dual 0, max TMDS clock 190, latency present 0 0, video latency 0 0, audio latency 0 0
>> -[drm:drm_edid_to_eld], ELD size 9, SAD count 1
>> +[drm:drm_edid_to_eld], ELD size 13, SAD count 8
>>
>> This is getting pretty much to unknown territory for me, so if anyone
>> knows anything better, please chime in!
>
> So my completely uneducated hunch was that the VSX-923 advertizes audio
> capabilities for better quality than the TV, and together the video and
> audio oversubscribe the link, unless you degrade video quality. And my
> idea below is to use whatever the TV uses. I don't know if we have any
> knobs to choose the audio quality somewhere, or whether the hda driver
> has something for that. And then again I might be completely off here...
>
> Jani.
>
>
>>
>> I think I'd try using the TV's EDID with the VSX-923 to see if the
>> ELD/SAD difference makes, uh, a difference. Something like this:
>>
>> 1. connect directly to TV
>> 2. copy /sys/class/drm/card0-HDMI-A-1/edid under /lib/firmware with some
>>    sensible name, e.g. panasonic-edid. the exact source path may vary
>>    depending on HDMI port etc.
>> 3. make sure you have CONFIG_DRM_LOAD_EDID_FIRMWARE=y
>> 4. use drm.edid_firmware=HDMI-A-1:panasonic-edid module parameter to
>>    tell DRM to load the edid from /lib/firmware. again, the connector
>>    name HDMI-A-1 may very depending on HDMI port you use, do check.
>> 5. connect to VSX-923; this should now use the EDID (and consequently
>>    ELD/SAD) from the TV
>>
>> I haven't actually tried this myself. *grin*.
>>
>> Let us know what happens. Thanks.
>>
>> BR,
>> Jani.
>>
>>
>>
>>>
>>> Hope this helps.
>>>
>>> On Thu, Oct 10, 2013 at 7:57 AM, Jani Nikula
>>> <jani.nikula at linux.intel.com> wrote:
>>>> On Wed, 09 Oct 2013, Jasper Smet <josbeir at gmail.com> wrote:
>>>>> As promissed i added the params to the kernel boot and here's the
>>>>> dmesg output with debugging enabled:
>>>>>
>>>>> http://sprunge.us/iEQR
>>>>
>>>> Similar dmesg for when you connect directly to the tv (and audio works)
>>>> might prove useful.
>>>>
>>>> Is your expectation that the VSX-928 picks up the sound, or pass through
>>>> to the tv? Is it possible to try both (I honestly don't know)?
>>>>
>>>> It might prove useful to file a bug on DRM/Intel at [1] to track
>>>> this. Then it won't get lost even if this thread quiets down.
>>>>
>>>>
>>>> Thanks,
>>>> Jani.
>>>>
>>>>
>>>> [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI
>>>>
>>>>
>>>>>
>>>>> Hope this helps!
>>>>>
>>>>> On Wed, Oct 9, 2013 at 1:28 PM, Jasper Smet <josbeir at gmail.com> wrote:
>>>>>> Ok will pass the info when i get home later this day.
>>>>>>
>>>>>> On Wed, Oct 9, 2013 at 1:01 PM, Daniel Vetter <daniel at ffwll.ch> wrote:
>>>>>>> On Wed, Oct 09, 2013 at 12:44:10PM +0200, Jasper Smet wrote:
>>>>>>>> Sorry,
>>>>>>>>
>>>>>>>> Intel NUC NUC Kit DC3217BY (Ivy bridge HD4000) Connected via HDMI to
>>>>>>>> my Pioneer VSX-928 which is then connected to my Panasonic tv
>>>>>>>>
>>>>>>>> Running latest stable Openelec build (3.2.2). (tried different builds
>>>>>>>> using stable/unstable drivers)
>>>>>>>
>>>>>>> That's really old ... Can you please test on something more modern? We
>>>>>>> made tons of fixes to the hdmi infoframe code.
>>>>>>>>
>>>>>>>> Here are some logs i pulled while i was debugging the issue with one
>>>>>>>> of the OpenElec developers.
>>>>>>>>
>>>>>>>> xbmc log (shows ALSA enumeration): http://sprunge.us/YJHc
>>>>>>>> alsa playback devices: http://sprunge.us/KZKX
>>>>>>>> xrandr modes: http://sprunge.us/DhFK
>>>>>>>> dmesg: http://sprunge.us/XRGP
>>>>>>>
>>>>>>> When you have a new kernel please boot with drm.debug=0xe added to your
>>>>>>> kernel cmdline and then grab the dmesg. Otherwise all the useful gfx debug
>>>>>>> noise isn't in there.
>>>>>>> -Daniel
>>>>>>> --
>>>>>>> Daniel Vetter
>>>>>>> Software Engineer, Intel Corporation
>>>>>>> +41 (0) 79 365 57 48 - http://blog.ffwll.ch
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Met Vriendelijke Groeten
>>>>>>
>>>>>> Jasper Smet
>>>>>> Developer
>>>>>>
>>>>>> Twitter: josbeir
>>>>>> E-mail: josbeir at gmail.com
>>>>>> Mobile: 0486/41.75.45
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Met Vriendelijke Groeten
>>>>>
>>>>> Jasper Smet
>>>>> Developer
>>>>>
>>>>> Twitter: josbeir
>>>>> E-mail: josbeir at gmail.com
>>>>> Mobile: 0486/41.75.45
>>>>> _______________________________________________
>>>>> Intel-gfx mailing list
>>>>> Intel-gfx at lists.freedesktop.org
>>>>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>>>
>>>> --
>>>> Jani Nikula, Intel Open Source Technology Center
>>>
>>>
>>>
>>> --
>>> Met Vriendelijke Groeten
>>>
>>> Jasper Smet
>>> Developer
>>>
>>> Twitter: josbeir
>>> E-mail: josbeir at gmail.com
>>> Mobile: 0486/41.75.45
>>
>> --
>> Jani Nikula, Intel Open Source Technology Center
>
> --
> Jani Nikula, Intel Open Source Technology Center


-- 
Met Vriendelijke Groeten

Jasper Smet
Developer

Twitter: josbeir
E-mail: josbeir at gmail.com
Mobile: 0486/41.75.45