From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0001083]: NVIDIA CK8 ALC655 SPDIF passthrough Date: Sun, 26 Jun 2005 13:18:16 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [82.113.61.162]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id E2A1B1B7 for ; Sun, 26 Jun 2005 13:18:16 +0200 (MEST) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: vedran Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 1083 Category: PCI - intel8x0 Reproducibility: always Severity: major Priority: normal Status: new Distribution: Debian sid Kernel Version: 2.6.10-ac12 ====================================================================== Date Submitted: 04-29-2005 15:33 CEST Last Modified: 06-26-2005 13:18 CEST ====================================================================== Summary: NVIDIA CK8 ALC655 SPDIF passthrough Description: We're using a motherboard with nVidia nforce2IGP chipset, and the sound device on this board is NVidia CK8, Realtek ALC655 rev 0. The motherboard is MSI K7N2GM2, and SPDIF passthrough works fine on Windows XP with stock realtek drivers. On Linux, I'm using the latest ALSA CVS (29.04.2005.) on a 2.6.10-ac12 kernel. I've been able to make a 2 channel pre-decoded SPDIF output work by using the hw:0,2 device. If I use the default device, there is no sound on SPDIF, regardless of the SPDIF related controls in mixer. The controls in the mixer are: However, I'm having trouble with AC3 passthrough, I'm using ac3dec -C from alsa-tools CVS, and I get no sound. I'm attaching the archive with the output of iecset and /proc/asound/card0/codec97#0/* files during the ac3dec run, and when idle. Maybe the fact that decoded SPDIF output is not working until I pass it through the hw:0,2 has something to do with this, how can I make ac3dec -C use hw:0,2? ====================================================================== Relationships ID Summary ---------------------------------------------------------------------- has duplicate 0001094 nforce4 - optical spdif out not working ====================================================================== ---------------------------------------------------------------------- tiwai - 06-21-05 11:19 ---------------------------------------------------------------------- Yes, only 48kHz works on nForce SPDIF, indeed. That is, the non-audio stream in other rates won't work. As mentioned, the driver works partially. It may work with the receiver which accepts AC3 stream even without SPDIF non-audio status bit by checking the preamble. But, the receivers strictly checking the non-audio bit don't work. It seems that the nForce doesn't use AC97 chip for transmitting SPDIF signals but directly drives from the nforce core. Thus, checking the datasheet of the ac97 codec chip won't help... ---------------------------------------------------------------------- gilesjuk - 06-26-05 13:18 ---------------------------------------------------------------------- But in my case the Realtek chip is on a seperate card with the SPDIF and audio ports. Surely the audio data gets written to this chip and then routed to the outputs depending on how the registers are set? This is my board: http://www.abit-usa.com/products/mb/products.php?categories=1&model=262 Excuse my ignorance, but how is the Nforce chipset responsible for the audio when it's an external codec being used? Issue History Date Modified Username Field Change ====================================================================== 04-29-05 15:33 vedran New Issue 04-29-05 15:33 vedran File Added: spdif_passthrough.tar.gz 04-29-05 15:33 vedran Distribution => Debian sid 04-29-05 15:33 vedran Kernel Version => 2.6.10-ac12 05-30-05 13:21 vedran Note Added: 0004809 06-01-05 16:53 tiwai Note Added: 0004862 06-01-05 16:54 tiwai Relationship added has duplicate 0001094 06-01-05 19:19 eklarson Issue Monitored: eklarson 06-03-05 00:31 Human Note Added: 0004880 06-03-05 00:32 Human Issue Monitored: Human 06-06-05 23:30 Human Note Added: 0004910 06-08-05 15:01 tiwai Note Added: 0004928 06-10-05 18:07 Human Note Added: 0004984 06-19-05 16:07 gilesjuk Note Added: 0005090 06-21-05 00:50 gilesjuk Note Added: 0005099 06-21-05 00:57 gilesjuk Note Edited: 0005099 06-21-05 11:19 tiwai Note Added: 0005102 06-26-05 13:18 gilesjuk Note Added: 0005263 ====================================================================== ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. 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