[meta-freescale] OV5640 MIPI-CSI2 driver - why the limitations?

[Daiane Angolini]

On Tue, Sep 16, 2014 at 10:25 AM, Jacob Pedersen <jp at circleconsult.dk> wrote:
> Hi folks,
>
>
>
> I'm using a OmniVision OV5640 MIPI-CSI2 image sensor with a iMX6 Quad board,
> and I'm doing some computer vision applications. I'm curious to know why the
> driver for the OV5640 sensor is limited to 30 fps, even though the sensor
> can do 60 fps at 720p and 90 fps at VGA? As far as I can see in the driver,
> the frame rate is clamped to maximum 30 fps.
>
>
>
> Is there a technical reason, or is it just because it hasn't been updated
> for all the supported modes?
>
>
>
> The driver also limits the available image formats, which makes one required
> to do the conversion in software or (as in my case) using the IPU. The IPU
> is fairly fast to do the simple UYVY to RGB24 conversion, but still slower
> than just getting an RGB image from the sensor.

This limitation is due to the camera device driver. Only few
configurations are implemented.


Daiane