Re: Problems with the omap3isp

Laurent Pinchart
2014-07-30T23:10:27Z

Hi Stefan,

Sorry for the late reply.

On Tuesday 15 July 2014 12:04:09 Stefan Herbrechtsmeier wrote:
> Hi Laurent,
>
> I have some problems with the omap3isp driver. At the moment I use a
> linux-stable 3.14.5 with your fixes for omap3xxx-clocks.dtsi.
>
> 1. If I change the clock rate to 24 MHz in my camera driver the whole
> system freeze at the clk_prepare_enable. The first enable and disable
> works without any problem. The system freeze during a systemd / udev
> call of media-ctl.

I've never seen that before. Where does your sensor get its clock from ? Is it
connected to the ISP XCLKA or XCLKB output ? What happens if you don't change
the clock rate to 24 MHz ? What rate is it set to in that case ?

> 2. If I enable the streaming I get a "omap3isp omap3isp: CCDC won't
> become idle!" and if I disable streaming I get a "omap3isp omap3isp:
> Unable to stop OMAP3 ISP CCDC". I think the problem is, that I can't
> disable the camera output. Do you change the order of the stream enable
> / disable after Linux 3.4?

Not that I know of.

The two problems might be related, maybe we could concentrate on the first one
first.