Messages in this thread | | | Date | Thu, 8 Aug 2002 10:37:38 +0200 | From | "Thomas Munck Steenholdt" <> | Subject | Re: i810 sound broken... |
| |
> On Mon, Aug 05, 2002 at 08:38:52PM +0200, Thomas Munck Steenholdt wrote: > > On Mon, 2002-08-05 at 17:28, Alan Cox wrote: > > > On Mon, 2002-08-05 at 14:47, venom@sns.it wrote: > > > > Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4 > > > > is fine. No time to switch to alsa (and not interested for now too). > > > > > > OSS for 2.5 is someone elses problem. I have no plan to do any work on > > > the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into > > > 2.5 for it. > > > > > > > So anyway - How should I go about determining the exact problem on my > > box... I've had it all along, and I know for a fact that the hardware is > > OK... Modules are loaded correctly, but it just does not work! > > I'll tell you what you can do. Grab some ICH docs so you have a list of > the valid regs on the i810 sound chip. Then, go into i810_audio.c and > write me up a little hack that, at the end of the chip init sequence, > whill dump the state of all the regs on the chip. Make it smart enough to > know about different regs on different chips (aka, Intel ICH0 and ICH1 > will probably have a slightly different reg setup than the ICH2 and > later). Then, load that driver on your machine and get me that register > dump. Then, I'll take the patch and apply it here on the i810 machines I > have that do work and get their register dump. We'll see then where the > differences are. On the i845 based machine I have at work, where the > sound doesn't work just like you describe, I've isolated the problem down > to the fact that when we start the DMA engine it *immediately* signals > that it has already finished the DMA process and has already stopped again > but it never actually does the DMA. So, I suspect there is some config > bit somewhere set wrong and the DMA is not taking place as a result (hell, > for all I know, the AC97 link for sound output may be off or something > like that). Getting a register dump from several busted machines as well > as from some working machines should enable me to solve the problem > relatively easily. I just haven't had the time to write the patch myself > and do any more work on the thing :-(
Please excuse me for not immediately responding with a working hack for this. I'm sorry to say that I have not yet had any experience in kernel programming and even though I jumped on the "job" as soon as I saw you mail, I quickly realized that I probably need some time of practicing, figuring out how stuff is done, and get into the actual close-to-hardware programming that is required for stuff like this...
Instead of promising to have a hack ready at any time... I'll follow this case closely and see what I can learn from it. I need to get into how stuff is done in this kind of area. Hopefully some day you'll see meactually post a patch of some kind... ;-)
Back to the case... I realized that I might not have explained myself correctly regarding my hardware... My machine is i845 based, using the i810 driver for audio... it is not i810 based!
Thomas
-- Send gratis SMS og brug gratis e-mail på Everyday.com --
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |