[pvrusb2] PARTIAL SUCCESS Re: terratec grabster av400.. short report..

[Mike Isely]

On Fri, 13 Mar 2009, Dave Craig wrote:

> Hi All,
> 
> Here's an update on support for the Terratec grabster AV400. I took the
> patch submitted previously to this list by Andrea Venturi and it worked
> to the same extent with my Yuan BMP837 capture card as it did with his
> AV400. The Yuan unit has the same USB vid:pid as the Terratec grabster.
> I then fixed up the S-video and audio issues reported.
> 
> The missing mojo for the S-Video and audio were:
> 
> 1. The S-Video is wired into Y2 and C4 on the CX25837 so in the
> routing_schemeav400 table the S-video entry should read:
> 
> 	[PVR2_CVAL_INPUT_SVIDEO] = {
> 		.vid = (CX25840_SVIDEO_LUMA2|CX25840_SVIDEO_CHROMA4),
> 		.aud = CX25840_AUDIO_SERIAL,
> 	},
> 
> 2. For some reason despite the audio being set to CX25840_AUDIO_SERIAL,
> the driver was staying on it's default value of CX25840_AUDIO8 which
> resulted in the wrong clock driving the cirrus ADC. I didn't investigate
> the root cause too much further, but changing the aud_input default
> value in cx25840-core.c resulted in the right sample clock rate and
> audio then worked.
> 
> 	state->aud_input = CX25840_AUDIO_SERIAL;
> 
> I'll take another look and if I find the root cause I'll post again.
> 
> DaveC.

DaveC:

Thank you for this info.  I've now spent the past hour or so combing 
through ALL of the previous e-mail I've collected regarding this 
Terratec device.  There's a lot more traffic that I had remembered :-)

I am in the midst of a pile of pvrusb2 related changes that will be 
required for correct operation in the 2.6.30 kernel.  Along the way I'm 
fixing a few other odds and ends.  I am going to try to get a new 
snapshot out before this weekend is over.

On top of that I'm going to then merge in Andrea's patch from over a 
year ago, and also incorporate other stuff from my notes (and your 
message above).  It still won't be enough probably for full support, but 
this will at least raise the baseline so people don't have to be 
guessing any further on aspects that are already understood.

  -Mike


-- 

Mike Isely
isely @ pobox (dot) com
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