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Is CSI0 accept only the GATED CLOCK MODE?

Question asked by ajithpv on Apr 4, 2012
Latest reply on Jan 16, 2014 by Adeneo Engineering Team
Branched to a new discussion

Hi all,

        Our requirement is that the 480p and 720p resolution videos from the HDMI source should be converted into ITU-BT.656 8-bit 4:2:2 YUV data with 480p(720x480) and 720p resolutions.We are using the HDMI Receiver chip for achieving this.

It's very strange that, When ever we trying with the V4L2 standard applications, the CSI0 line will work only for GATED CLOCK MODE! In other words, when we set the configuration as

CSI0_SENS_CONF register : SENSOR DATA FORMAT as YUV 4:2:2 
CSI0_SENS_CONF register : SENSOR PROTOCOL as GATED CLOCK MODE

We getting the video.

But,If we set CSI0_SENS_CONF register : SENSOR PROTOCOL as PROGRESSIVE MODE, CSI0 couldn't able to receive even a single frame!

 

I would like to know why this is happening? How we can resolve this?

 

Since we are using 480p and 720p (means all are in progressive mode), we prefer to do it with  " CSI0_SENS_CONF register : SENSOR PROTOCOL as PROGRESSIVE MODE " only.

Please note that we using the V4L2 mxc_capture driver also for achieving our requirement.

 

Any help would be very appreciated...

Thanks in advance

-Ajith

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