I remember there being some work that the graphics guys had to do on the Windows side to get HDMI audio working for us. We have no control over the HDMI, we just enable our SPDIF pin and pump the bits.
I can see if I can get a contact over at NVidia/ATI to help us out a bit if you want.
IDT PC Audio Demo/Linux/Test (512) 330-3127
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Friday, February 29, 2008 8:56 AM To: Tellman, Steven Cc: Armando Di Cianno; alsa-devel@alsa-project.org Subject: Re: [alsa-devel] HDMI v. ICH8 on Dell XPS M1330
At Fri, 29 Feb 2008 06:48:12 -0800, Tellman, Steven wrote:
Takashi,
On the XPS M1330 (and XPS M1530) the SPDIF pin of the 9228 is hooked to the HDMI as these laptops were made before the HDMI portion had their own audio codec portion of the transceiver. So technically,
it
should be pretty simple ;)
Thanks, that's good to know.
Do you know any other issues that stop HDMI audio working? IIRC, ATI board has a h/w switch in the video side to enable/disable its graphic-board HDMI, for example...
Also, does STAC9228 codec support verbs for controlling HDMI, e.g. converter channel count (F2Dh, 72Dh) ?
Takashi
IDT PC Audio Demo/Linux/Test
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Friday, February 29, 2008 5:57 AM To: Armando Di Cianno Cc: Tellman, Steven; alsa-devel@alsa-project.org Subject: Re: [alsa-devel] HDMI v. ICH8 on Dell XPS M1330
At Thu, 28 Feb 2008 20:29:06 -0500, Armando Di Cianno wrote:
On Thu, 2008-02-28 at 12:55 -0800, Tellman, Steven wrote:
Notice we use the "Other Digital" as the jack. Is that possibly causing a problem? IEC958 shows up, but doesn't provide output to HDMI
devices
(that I've tested).
At a user level, this is definitely what I've experienced.
Are there any suggestions for testing if my current ALSA install /should/ work, or how to find out if something is
misconfigured,
or will simply not work?
I will gladly try any suggestions, thoroughly. Thanks.
It's a bit hard to judge right now. So far, many HDMI devices seem not working even though it appears set up properly. I've heard that ATI HDMI devices are working, but others are not well, e.g. on some devices only left channel is output and on others silent.
Moreover, I'm not pretty sure whether HDMI is connected from the digital out of STAC codec. On many devices (e.g. ASUS ones), there is a dedicated codec for the HDMI transmitter.
So, right now, it's total lack of (hardware) information, unfortuantely.
We may try some verbs for HDMI that are not used in the current ALSA code, at least. These verbs were extended later...
Takashi