From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Hsu Subject: About bt87x Date: Wed, 9 Mar 2005 19:00:49 +0800 Message-ID: <7fe20599050309030051e073c3@mail.gmail.com> Reply-To: Joe Hsu Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Hello: I have a bt878 audio device. It can work only at digital sample rate 8000HZ from TV tuner source. For this bt878 audio device, we have modified some source of the kernel module btaudio. The only difference between the original module and the modified one is the value of GPIO_DMA_CTL register. And this new btaudio module works for me. Now, I have tried to modify alsa bt87x to work for me. I add another pci_device_id to represent 8000HZ sample rate. I changed three fields of snd_bt87x_digital_hw to represent mono 8000HZ. But still don't work. And then I changed the value of GPIO_DMA_CTL register as I did in the btaudio module. Well, it worked in slow motion when I played the captured pcm data. Can somebody give me some hints? Thanks -- The sun is shinny but the ice is slippery. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click