topic Re: Capturing odd resolutions on iMX8M mini in i.MX Processors

Capturing odd resolutions on iMX8M mini

alejandro_flores — Wed, 19 Oct 2022 16:32:56 GMT

Hello,

I am working on a sensor driver for an iMX8M mini module. This sensor allows resolutions with odd Height values, for example width=240 x height=135.

I've noticed that every time I input an odd Height, this value is rounded to the next even number, in this example, is rounded from 135 to 136.

Is this some platform specific limitation? Is there any reason why odd resolutions could not be supported?

Thank you.

Re: Capturing odd resolutions on iMX8M mini

joanxie — Fri, 21 Oct 2022 04:09:27 GMT

what format of data from your camera? pls refer to the CSI_IMAG_PARA in the reference manual and read this register to check

Re: Capturing odd resolutions on iMX8M mini

alejandro_flores — Wed, 02 Nov 2022 21:56:47 GMT

Hello @joanxie, thanks for your answer.

I am using multiple formats, however, that register that you mentioned gave me a huge hint of what might be the issue.

The documentation of the CSI_IMAG_PARA register states the following:

If the input data from the sensor is 8-bit/pixel format, the IMAGE_WIDTH should be a multiple of 8 pixels.
If the input data from the sensor is 10-bit/pixel or 16-bit/pixel format, the IMAGE_WIDTH should be a multiple of 4 pixels.

I believe that this the limitation that I was looking for, with this information I should be able to limit which resolutions can be used or not.

Thank you.