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Re: [pwc] automatic gain control

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Subject: Re: [pwc] automatic gain control
From: Roman Haefeli <>
Date: Sat, 22 Sep 2007 06:24:39 +0200
On Thu, 2007-09-13 at 17:31 -0400, John Kua wrote:
> Roman,
>
> I recently went through this problem. It seems that using setpwc to disable
> AGC is pointless, because the next time the camera is accessed, as far as I
> can tell, it defaults back to AGC on. This, however, is not a pwc problem,

i just found out: it _is_ a pwc driver problem. pwc-if.c has a line:

    pwc_set_agc(pdev, 1, 0);

(which is line 1213 in pwc-10.0.12-rc1) & thank you matju for finding
this.

this line seems to initialize the agc parameter to 'automatic'. i just
commented out this line and now i can use the cam with manual gain
control, even if the app, i am using the cam with, doesn't do any pwc
specific settings.

sorry to doublepost this, but it seems a pretty important solution for
many cases and i wanted to make sure, that for future searches, the
solution will be find in the correct thread.

roman




        
                
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