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From: Johannes Berg <johannes@sipsolutions.net>
To: "René Rebe" <rene@exactcode.de>, alsa-devel@alsa-project.org
Subject: Re: PowerMac 11,2 topaz digital-in
Date: Mon, 22 May 2017 08:15:18 +0200	[thread overview]
Message-ID: <1495433718.2653.2.camel@sipsolutions.net> (raw)
In-Reply-To: <9F610D2B-FFC7-45DC-89DD-C6ED90D00BE1@exactcode.de>

Hi,

> I noticed digital input would not show up at all on my PowerMac G5
> 11,2, I see this in dmesg:
> 
> [   15.719952] snd-aoa-fabric-layout: Using PMF GPIOs
> [   15.720519] snd-aoa-fabric-layout: can use this codec
> [   15.760567] snd-aoa-codec-onyx: attached to onyx codec via i2c
> [   15.760745] snd-aoa-fabric-layout: platform-onyx-codec-ref doesn't
> match!
> [   15.760748] snd-aoa: fabric didn't like codec onyx
> 
> and poking around a bit more I found a “topaz” codec apparently some
> Crystal Semiconductor CS84xx “Topaz” (S/PDIF digital input) showing
> up nowhere in the ALSA sources.
> 
> Am I overlooking something, or was this lost in merging? Any hint
> would be appreciated.

Neither, it was simply never implemented.

I believe that in the past ~11 years since this got merged I *still*
haven't gotten any other hardware that had optical output, so I don't
think I could possibly test it :)

Also, it's not as simple as output because there has to be clock
recovery etc. and I never could understand how alsa would handle that.

Anyway, that's all I remember. I still have the G5 powermac, but it's
never powered on any more (I used to still use it for big endian
testing, but our latest HW generation makes the PCI-E bus in the system
unhappy enough that it won't even boot).

johannes
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  reply	other threads:[~2017-05-22  6:15 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-04 22:02 HDA Intel ALC889A optical spdif input on MacBooks René Rebe
2017-04-21 16:37 ` HDA Intel ALC889A optical optical spdif in René Rebe
2017-04-21 17:22   ` René Rebe
2017-04-21 18:01     ` Takashi Iwai
2017-04-21 20:29       ` René Rebe
2017-04-21 22:04         ` René Rebe
2017-05-21 13:00           ` René Rebe
2017-05-21 14:33             ` PowerMac 11,2 topaz digital-in René Rebe
2017-05-22  6:15               ` Johannes Berg [this message]
2017-05-22  8:12                 ` René Rebe
2017-05-22  8:15                   ` Johannes Berg

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