topic Re: i.MX6S screen rotation in i.MX Processors

i.MX6S screen rotation

Yuri — Wed, 21 Aug 2013 04:27:34 GMT

Original SR #1-1138945566.

Our customer Navico builds a board with i.MX6S and a native TFT 1366x768 display

and needs to attach second HDMI output that will also be 1366x768.

The problem is that because of the polarization filter of the glass,

these two displays need to be rotated 180 degrees with respect to each other.

They are asking us to give them direction on the best way to do this.

The IPU lacks the capability, and it looks like GPU solutions may require

triple buffering of the fb. They are open to any suggestion like moving

to a i.MX6D or maybe a DL and have the other core do the rotation.

This route may not be ideal because the single IPU may be a problem.

Victor.

Re: i.MX6S screen rotation

YixingKong — Fri, 06 Sep 2013 06:45:06 GMT

Yuri, this SR had been closed for some time. You should have followed the process and put the answer back to here and close the DI. Also move the DI to public community if no customer critical information in.

Re: i.MX6S screen rotation

karina_valencia — Mon, 09 Sep 2013 13:46:32 GMT

SR 1-1151998941

Re: i.MX6S screen rotation

YixingKong — Mon, 23 Sep 2013 06:46:48 GMT

Re: i.MX6S screen rotation

Yuri — Mon, 23 Sep 2013 07:25:12 GMT

There the two options for you:

1. If you use QDeclarativeView or QGraphicsView you can simply use

http://qt-project.org/doc/qt-5.0/qtwidgets/qgraphicsview.html#rotate

that should be fearly trivial to do.

2. Within the QWS plugin you can rotate as well.

This has one very important limitation:

It can only happen/be decided at start up.

You need to either configure with a special qws gfxdriver enabled and/or use the API your self:

http://qt-project.org/doc/qt-4.8/qt-embedded-displaymanagement.html

http://qt-project.org/doc/qt-4.8/qscreen.html#setTransformation