At Fri, 25 May 2007 09:37:44 -0700, Tobin Davis wrote: > > Just out of curiosity, has anyone with these codecs tried the linuxant > software? I looked at it briefly, and they are modifying my patch_conexant.c > driver. Some of the changes I may include in the main alsa driver (hey, I > wrote the bulk, so why not), some of it would never pass kernel coding style. > > I am kind of peeved that they don't bother to communicate with the alsa team, > instead they take all of the hda code and hack it up, adding their copyright > info to the code header (see header patch attached). Takashi, what's your > take on this? It's GPL and they are allowed to that. And I'm not surprised at all by their action. It's a typical one that many hardware vendors take. The problem is that their modification would be never accepted because of the binary-only part. As long as this exists, Conexant will keep doing in this way because _they_ need the control over this, not we, the open-source community. I think the best would to convince them to rewrite the code to user-space daemon like slmodemd, so that they no longer need to touch the kernel world. This will make it eventually easier for them to maintain their codes. My upcoming hda-tools is developed also for such a purpose... Takashi > > Tobin > > On Fri, 2007-05-25 at 12:14 +0200, Takashi Iwai wrote: > > At Thu, 24 May 2007 19:32:55 -0700, > Tobin Davis wrote: > > > > I don't think this is limited to the Conexant CX20549 (5045) or the > > CX20551 (5047). I have a laptop with a Conexant vendor ID of 2bfa. The > > hda-intel driver picks it up, but uses the hda-generic configuration. > > > > On the CX20549 & CX20551, I think I need to toggle a bit to enable the > > MFG portion. I have a test board here, but the drivers are not > > detecting it, even without my patch_conexant code. I'll look at the > > intel-80xm module, but it is written for the AC'97 bus specification, > > which is very different from the HDA bus specification. > > The bus design isn't a so big issue, but the problem would be rather > the difference of the codec/controller communication. For example, > smartlink modem codecs (si3054) and compatibles are already supported > in patch_si3054.c. As you can see, the code is really small. > > AFAIK, the conexant modem codec requires extra communication, a kind > of ACK, and thus incompatible with smartlink codecs. Similarly, the > intel8x0m driver also doesn't support conexant chips because the > conexant codecs need different controls. > > Ideally, the whole encoding stuff should go to the user-space like > slmodemd. I once tried to convince Conexant guys to do that, but they > disagreed because of lack of man power. To me, it's hard to imagine > because keeping the kernel driver needs more effort... > > Takashi > > > > > Tobin > > > > On Wed, 2007-05-02 at 21:13 -0500, Victor Schneider wrote: > > > > > How about being able to parameterize Alsa modules so that the intel 80xm > > > module finds any hda modem that also acts as an Intel hda chip? I am > > > referring to the Conexant combination modem and hda chip that gets > > > identified as "Conexant Waikiki" by alsamixer, but that 80xm can't find as a > > > modem. Giving the 80xm module the device:identifier value to override its > > > detection of the Intel version of the Conexant hda modem might let slmodemd > > > work. > > > > > > _______________________________________________ > > > Alsa-devel mailing list > > > Alsa-devel@xxxxxxxxxxxxxxxx > > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > > > -- > > Tobin Davis <tdavis@xxxxxxxxxxxx> > > _______________________________________________ > > Alsa-devel mailing list > > Alsa-devel@xxxxxxxxxxxxxxxx > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > > > -- > Tobin Davis <tdavis@xxxxxxxxxxxx> > > > [2 cxtheader.patch <text/x-patch; UTF-8 (7bit)>] > --- ../../../../../../../alsa/alsa-project/alsa-driver/alsa-kernel/pci/hda/patch_conexant.c 2007-05-23 09:54:08.000000000 -0700 > +++ patch_conexant.c 2007-05-25 09:16:39.000000000 -0700 > @@ -1,10 +1,12 @@ > /* > - * HD audio interface patch for Conexant HDA audio codec > + * HD audio interface patch for Conexant HDA audio/modem codec > * > * Copyright (c) 2006 Pototskiy Akex <alex.pototskiy@xxxxxxxxx> > * Takashi Iwai <tiwai@xxxxxxx> > * Tobin Davis <tdavis@xxxxxxxxxxxx> > * > + * Copyright (c) 2005-2006 Linuxant inc. > + * > * This driver is free software; you can redistribute it and/or modify > * it under the terms of the GNU General Public License as published by > * the Free Software Foundation; either version 2 of the License, or _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
