topic Re: IMX53 rotate in i.MX Processors

IMX53 rotate

woutervh — Thu, 25 Oct 2012 13:26:53 GMT

I have some 1920x1080 screens attached by LVDS to a IMX53 platform. These needs to be rotated by 90 or 180°.

I'd prefere to do this in kernel space because I don't want the user to bother about the screen orientation.

Where do I start?

Re: IMX53 rotate

VladanJovanovic — Thu, 25 Oct 2012 13:51:40 GMT

In Linux BSP documentation package there's a document named "imx5x_IPU_LIB_UG.pdf". It describes IPU API and how you can use IPU to perform these functions accelerated by HW.

Usually your application will need to generate frame to a buffer of XxY size, and then you'd use IPU to rotate it to YxX framebuffer. So a small plugin is usually required to integrate to an existing app.

Re: IMX53 rotate

woutervh — Thu, 25 Oct 2012 14:14:17 GMT

Yes, but I want it in kernel, so that the user/app/whatever doesn't need to use the IPU api...

Re: IMX53 rotate

Philip_FSL — Fri, 26 Oct 2012 09:20:44 GMT

The user side library sits on top of kernel ioctl calls. You should be able to replicate the functionality kernel side that calls the IPU kernel driver functions directly.

Re: IMX53 rotate

Noel_V — Mon, 08 Jun 2015 07:14:18 GMT

Hi wouter,

I'm in the need for rotating the FRAME buffer on the IMx53 .

Did you succeed in rotating ( so that bootup shows a correct display)?

Any pacthes requried ?

Regards

Noel