[alsa-devel] HDMI on HDA device=3
perex at perex.cz
Tue Nov 9 18:54:07 CET 2010
On Tue, 9 Nov 2010, Mohammad Bahathir Hashim wrote:
> On 2010-11-09, Jaroslav Kysela <perex at perex.cz> wrote:
>> On Tue, 9 Nov 2010, Mohammad Bahathir Hashim wrote:
>>> On 2010-11-09, David Henningsson <david.henningsson at canonical.com> wrote:
>>>> I have seen a few HDMIs which share the HDA controller with the onboard
>>>> sound card, but the codecs are different, e g the onboard one is at
>>>> address #0 and the HDMI is at address #3 - or even #3, #7, #8 and #9 in
>>>> some cases.
>>>> Now, if the user specifies the device string hdmi:x (where x is card
>>>> name/number), I'd like it to kind of autodetect this and use DEV=3
>>>> instead of DEV=0, and without breaking the cards where the hdmi is a
>>>> separate card with a codec at address #0. However, it still seems like
>>>> the device is at DEV=3 somehow.
>>>> Now, looking at /usr/share/alsa/cards/HDA-Intel.conf, I notice that
>>>> there are entries HDA-Intel.pcm.hdmi.0 which sets DEV=3, so it seems
>>>> like someone already thought of this. However, just using "hdmi:x" does
>>>> not trigger "DEV=3". I'm still not grepping all of the alsa lisp
>>>> architecture stuff, so could someone explain to me how the
>>>> HDA-Intel.pcm.hdmi.0 entry relates to the "hdmi:x" alsa device string?
>>> I am not sure about Intel HDMI, but, in my case with MacbookPro 6,2
>>> (15" Mid 2010); the HDMI audio stream via NVIDIA HDMI can only be
>>> started if I use hw:1,7 (or Mplayer's -ao alsa:device=hw=1.7). No
>> This should be equal to '-ao alsa:device=hdmi=1.1' (hdmi:1,1 in ALSA
>> Jaroslav Kysela <perex at perex.cz>
>> Linux Kernel Sound Maintainer
>> ALSA Project, Red Hat, Inc.
> Ok, I tried the -ao alsa:device=hdmi=1.7 ... but, MPlayer complains;
No, 1.7 but 1.1 (hw device 7 is logical device 1 - aka second device - for
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.
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