From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Lee Revell" Subject: Re: HDMI v. ICH8 on Dell XPS M1330 Date: Tue, 4 Mar 2008 19:54:58 -0500 Message-ID: <75b66ecd0803041654x2733bf35pbce849e7bef2ea85@mail.gmail.com> References: <1204152070.12914.18.camel@localhost> <16A430A423D62246A24C9A892622FE66048B88@CORPEXCH1.na.ads.idt.com> <1204248546.12914.86.camel@localhost> <75b66ecd0803011903t535c8ecbv8f910077484035ff@mail.gmail.com> <16A430A423D62246A24C9A892622FE660550CF@CORPEXCH1.na.ads.idt.com> <1204498741.10206.26.camel@razman.gruemaster.com> <1204623862.13915.10.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from qb-out-0506.google.com (qb-out-0506.google.com [72.14.204.237]) by alsa0.perex.cz (Postfix) with ESMTP id BABA41038A5 for ; Wed, 5 Mar 2008 01:55:00 +0100 (CET) Received: by qb-out-0506.google.com with SMTP id q12so995873qba.12 for ; Tue, 04 Mar 2008 16:54:59 -0800 (PST) In-Reply-To: <1204623862.13915.10.camel@localhost.localdomain> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Jiang zhe Cc: tiwai@suse.de, "Tellman, Steven" , Armando Di Cianno , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On Tue, Mar 4, 2008 at 4:44 AM, Jiang zhe wrote: > On Mon, 2008-03-03 at 06:59 +0800, Tobin Davis wrote: > > It is possible that HDMI audio is pulled from an unknown i2c bus on > > the > > video chip. 3dfx did that a long time ago with their 3500 card for > > their tv tuner portion. > > > > I think at this point, unless Steven knows more, this may be > > unsupported > > until nVidia adds support in their driver or opens up part of the > > spec. > > > I googled some info about the nvidia G84** or G86** graphics core. > They got the audio signal from the external audio device through spdif. > > For Dell M1330, the spdif configuration for the stac92** codec looks > well, maybe the graphic driver can control whether the audio signal is > allowed to transfer through the HDMI port? In addition to anecdotal evidence, I can confirm that on my work machine the ATI video driver does seem to touch the audio. Interestingly it's the userspace X driver, not the in-kernel FGLRX module. rlrevell@chronopolis:~$ strings /usr/lib/xorg/modules/drivers/fglrx_drv.so | grep -i hdmi | grep -i audio ex_aHDMIAudioParameters Isn't DRM fun? ;-) Lee