From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-fx0-f218.google.com ([209.85.220.218]:50371 "EHLO mail-fx0-f218.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751151AbZIWT2K (ORCPT ); Wed, 23 Sep 2009 15:28:10 -0400 Received: by fxm18 with SMTP id 18so882894fxm.17 for ; Wed, 23 Sep 2009 12:28:13 -0700 (PDT) Date: Wed, 23 Sep 2009 22:28:10 +0300 From: "Aleksandr V. Piskunov" To: Mauro Carvalho Chehab Cc: "Aleksandr V. Piskunov" , linux-media@vger.kernel.org Subject: Re: xc2028 sound carrier detection Message-ID: <20090923192810.GA4653@moon> References: <20090921223751.GA1303@moon> <20090921215238.2e189d60@pedra.chehab.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090921215238.2e189d60@pedra.chehab.org> Sender: linux-media-owner@vger.kernel.org List-ID: On Mon, Sep 21, 2009 at 09:52:38PM -0300, Mauro Carvalho Chehab wrote: > Em Tue, 22 Sep 2009 01:37:51 +0300 > "Aleksandr V. Piskunov" escreveu: > > > Is xc2028 tuner able to autodetect/handle different sound carrier standards > > without being spoon-fed precise input system information using module param > > or ioctl? > > > > Got an ivtv board here (AverTV MCE 116) with xc2028 and cx25843. > > > > When I specify a generic standard using 'v4l2-ctl -s pal', xc2028 loads > > firmware specific to PAL-BG, so if there is an PAL-DK or PAL-I signal on RF > > input... nice picture but no sound. Setting a more precise standard like > > 'v4l2-ctl -s pal-dk' fixes the issue, but other PAL-BG or PAL-I channels > > loose sound. > > > > Bttv board with a tin-can tuner sitting on the same RF source autodetects > > PAL-BG, PAL-DK and PAL-I without any manual intervention. > > > > So any voodoo tricks to get the autodetection running? > > No, sorry. It requires specific and different firmwares based on your video > standard. I suspect that it is due to some firmware limiting size, since newer > products from Xceive, like xc5000 don't have such troubles, but this is just my > guess. Mmm, tested that tuner under windows, it autodetects all 3 sound carrier sub- standards instantly: PAL-BG, PAL-DK, PAL-I. In order to test, I connected ancient Panasonic VCR that has a built-in tuner and can output video to RF-OUT on fixed frequency using PAL standard. Sound carrier frequency can be choosen using hardware switch BG, DK or I. So under windows: tuner produces clear audio in BG, DK and I, hardware switch can be toggled on fly, audio never stops, only a few miliseconds of static on switch. Under linux: audio only works if driver is set to use specific audio carrier sub-standard AND same is selected on PVR. (not to mention extremely unreliable PAL-DK detection by cx25843, only works 50% of times, but thats another issue) Either a more generic firmware exists can be uploaded on xc2028.. or several can be uploaded at once. Any xc2028 gurus out there?