On 2010-11-09 15:58, Jaroslav Kysela wrote: > On Tue, 9 Nov 2010, David Henningsson 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? > > It's not about a lisp (this portion of code is not used at all). It's > about the (partly) dynamic alsa-lib configuration. Ok, thanks for the clarification. > Use always indexes from 0.. (hdmi:0,0 etc..) Fist number is card number, > second number is device number (which is logical device number mapped to > different physical device number in case when HDA card contains both > analog and HDMI sections). > > If you read HDA-Intel.conf, you'll get this device mapping (logical, > physical): > > 0 -> 3 > 1 -> 7 > 2 -> 8 > 3 -> 9 > > Perhaps, something does not work correctly? Hmm, this is a little confusing. Do all these mean the same thing, and do they all correspond to the logical device number? hdmi:x,y hdmi:CARD=x,y hdmi:CARD=x,DEV=y hdmi:CARD=x,DEVICE=y And would hdmi:x and hdmi:x,0 be the same thing? And if all these correspond to the logical device number, is there any way you can specify the physical device number directly in the connect string? -- David Henningsson, Canonical Ltd. http://launchpad.net/~diwic _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
