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LCD HDMI dual output A20 - mainline


PaddleStroke
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Is anyone know how to set HDMI and LCD simultaneously on mainline kernel? 

We use a 3.5" LCD for which we made a patch (see enclosed).

Now I'd like to have both HDMI and LCD showing the same framebuffer.

 

Currently HDMI is only showing the console while signal is OK on LCD.

 

Any hint would be appreciated.

u-boot-sunxi-next.patch kernel-sunxi-next.patch

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What is the difference between TCON, framebuffer, pipeline, front end, display ?

 

I found that it seems that linux framebuffers have been replaced by DRM on mainline. But can't find much information about this.

https://www.kernel.org/doc/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt

 

Anyone familiar with framebuffers/display/... can give me the big picture on how this is organized ?

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