Multiple displays

Just add the video option twice on the command line. The easiest way to do this is by setting the extra environment variable in U-Boot which is automatically appended at the end of the command line.

Your F&S Support Team

Hello,

rgb lcd must be first display (disp0) device mxcfb0 in your settings, because rgb lcd is hardwired to display 0 signals. You can see it e.g. in reference card for efusA9 (https://www.fs-net.de/assets/d…PIO-ReferenceCard_eng.pdf) Furthermore if mxcfb0 is a first user of the IPU so it will get an overlay. It will create fb0 (main framebuffer) and fb1 (overlay). mxcfb1 is the second user of IPU so it get no overlay and create only fb2 (main framebuffer).

In your case the settings

must be correct. Framebuffer in this case are:
- rgb lcd fb0 mainframebuffer and fb1 overlay
- lvds has only mainframebuffer fb2

Hope that helps.

Quote from RSchubert

display on FB1 is not working (RGB-TTL) and /sys/class/graphics/fb1/modes is still set to standard U:240x320p-60

It is important to understand, that mxcfb0 and mxcfb1 are *not* the references to the Framebuffers. They are the references to the display instances. Each display instance will create at least one framebuffer, but sometimes also a second one. On i.MX6 the display drivers are implemented in a way that the first display that is activated on an IPU also gets a an additional video overlay. So in your case the display instance that you activate as mxcfb0 always creates /dev/fb0 for the main content *and* /dev/fb1 for the video overlay. And the framebuffer for display instance mxcfb1 is actually /dev/fb2.

Your F&S Support Team