On Fri, Jun 06, 2014 at 09:26:31AM -0400, Paul Fox wrote:
> > On Wed, Jun 4, 2014 at 9:38 PM, James Cameron <qu...@laptop.org> wrote:
> > > We have begun qualification of a new camera sensor SIV121C for
> > > production of the XO-1.75 and XO-4 laptops.
> > ...
> >
> > > The new sensor does a little bit better at low light levels, as a
> > > result of a different analog to digital conversion method.
>
> i noticed on trac that you're supporting the new sensor on 1.5. for
> replacement purposes?
yes, that's my hope. i'm assessing that now.
i've an XO-1.5 motherboard, display, and sensor stacked, and have been
fiddling with new bits in the sensor registers; output drive
capability select [1].
the XO-1.75 and XO-4 work best with 3mA for the pixel clock and "other
outputs", which are the data lines. at 8.2mA there are occasional
corruptions from bright parts of a scan line to the rest of the line,
with the condition clearing for the next scan line.
the XO-1.5 works best with 8.2mA for both. at 3mA the data is certainly
corrupt, at 5.6mA it is occasionally corrupt, and at 8.2mA it is
rarely corrupt.
references:
1. siv121c-config CHIP_CNTR in
http://code.coreboot.org/p/openfirmware/source/commit/3727/
--
James Cameron
http://quozl.linux.org.au/
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