Hi, On Apr 21, 2017, at 22:29, René Rebe <rene@xxxxxxxxxxxx> wrote: > Hi, > > On Apr 21, 2017, at 20:01, Takashi Iwai <tiwai@xxxxxxx> wrote: > >> On Fri, 21 Apr 2017 19:22:16 +0200, >> René Rebe wrote: >>> >>> On Apr 21, 2017, at 18:37, René Rebe <rene@xxxxxxxxxxxx> wrote: >>> >>>> Hello again, >>>> >>>> so I checked the MacBook schematics and it looks like the optical input should be directly connected to pin 47 (GPIO3/SPDIFIN) >>>> >>>> Maybe EAPD get’s accidentally / wrongly enabled? - Maybe someone can point me how to double check this in ALSA? >>> >>> I the meantime I finally figured out how this debug verb setting should work via: >>> >>> # hda-verb /dev/snd/hwC0D0 0x14 0x70C 0 >>> nid = 0x14, verb = 0x70c, param = 0x0 >>> value = 0x0 >>> # hda-verb /dev/snd/hwC0D0 0x15 0x70C 0 >>> nid = 0x15, verb = 0x70c, param = 0x0 >>> value = 0x0 >>> >>> which made no difference either, and the ALC889 spec reads “when pin >>> widget SPDIF-IN is not connected via the programming configuration >>> register.” >>> >>> Could that be a missing bit? >>> >>> Any pointer or verbs I should poke welcome :-/ >> >> Well, from the codec POV, the SPDIF in is straightly connected from >> the pin to the audio in widget, so there should be no special thing >> there. The possibly missing setup is the vendor-specific things, and >> Apple has been implementing the stuff always in a wild manner, >> e.g. doing via VREF, GPIO or whatever. > > Did you check anything in this proc file codec setup I posted? > > As far as I can see on schematics for the MacBook (e.g.. google returned > a APPLE_M42C_FA522_Macbook.pdf) the optical module RX output > seems to be “directly" attached to the codec’s spdif-in pin. > > Yet on both, the MacBook as well on the MacBook Pro > I found no way to get any digital input captured. The same setup > works when booted in macOS, as well as when I plug > in my digital audio source into my aging maudio delta 1010, > with Linux, which, however, I do not want to continuously use for > this setup, … > > It’s a pity, I don’t think there are so many other laptops with > optical input :-/ For the MacBook Pro I googled the i/o board schematics (820-2273 LIO.pdf) - unfortunately some lines are crippled / strange rectangles. However, it most likely spdif-in is directly connected like in the MacBook. The schematic calls the codec a ALC885 instead of the ALC889A as indicated by ALSA, … And the schematic labels the codec spdif innput pin SPDIFI/EAPD/MIDI-I/DMIC-R. However, the public ALC885 spec has a footnote “MIDI function is not supported as pins 46 and 48 are assigned as S/PDIF IO” and for the DMIC: “pin 47 can be configured to support a secondary digital mic input (DMIC-R). It is supported via a customized Realtek driver” It is not getting better, … :-/ -- ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
