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Question, i.MX6DQ display rotation 180 degrees

Question asked by AVNET JAPAN FAE (team share account) on Jan 27, 2014
Latest reply on Feb 28, 2014 by Yixing Kong

Dear Community,


I would like to ask about display rotation 180 degrees on i.MX6.

My customer is trying to rotate LCD display 180 degrees on i.MX6 with Freescale LinuxBSP.

He modified CPMEM parameter for IDMA currently contained in LinuxBSP as below.

VF(Vertical flip) bit =1 and HF(Horizontal flip) bit = 1.

As the result, vertical flip did work but horizontal flip does not work.

In my understanding,

The horizontal flip can work only when the IDMA is to transfer data from/to IRT.

Because the CPMEM parameter he modified is not the one for transferring data from/to IRT, horizontal flip does not work.

To achieve horizontal flip, one has to add new IDMA data transfer from/to IRT and has to set HF bit in its CPMEM parameter.

Am I correct?