[ivtv-users] cx18 HVR-1600 Analog Audio Issues

[Darren Blaber]

Andy Walls wrote:
> On Thu, 2010-03-04 at 20:51 -0500, Darren Blaber wrote:
>   
>> Andy Walls wrote: 
>>     
>>>>>> Hello,
>>>>>>
>>>>>> I recently bought a HVR-1600 PCI card, and after playing with it for quite a
>>>>>> while, it seems I have come to the conclusion that audio does not work
>>>>>> unless I start in windows first, then reboot back into linux. I am using the
>>>>>>
>>>>>> latest cx18 driver from http://linuxtv.org/hg/v4l-dvb/ . Its almost like the
>>>>>> card needs windows to initialize before it will work in linux.  I believe to
>>>>>> be using the latest firmware, I grabbed it from
>>>>>>
>>>>>> http://linuxtv.org/downloads/firmware/v4l-cx23418-apu.fw [along with the
>>>>>> rest of firmware files]. Is there anything I can do to debug this problem?
>>>>>>             
>
> Darren,
>
> Could you please try the cx18 driver at this repository:
>
> 	http://linuxtv.org/hg/~awalls/cx18-audio
>
> ?
>
> In two patches, I've reworked when the audio detection microcontroller's
> soft and hard resets are asserted.
>
> If those two patches don't seem to work, please change
> linux/drivers/media/video/cx18/cx18-av-core.h
>
> 	#define CXADEC_AUDIO_SOFT_RESET    0x810
>
> to be
>
> 	#define CXADEC_AUDIO_SOFT_RESET    0x9cc
>
> and then see if the patches work.  (I've got some conflicting
> information on which register is actually the soft reset register.)
>
>
> I haven't tested any of this, as I don't have an analog RF signal handy
> ATM.
>
> Regards,
> Andy
>
>
>   
Hello, I tried your repo, and tried modifying the registers. Default, 
the 0x810 seems to make no difference with the audio.  When changing the 
register to point to 0x9cc, the tuner outputs a blank signal, completely 
black. One thing I noticed is that CXADEC_GENERAL_CTL and 
CXADEC_AUDIO_SOFT_RESET point to the same register. Is this intended? 
Thanks.
#define CXADEC_GENERAL_CTL         0x810
#define CXADEC_AUDIO_SOFT_RESET    0x810
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