I don;t specifically know what goes on yet, will be trying it today. I don't think you get two framebuffers, but one that can be spread over two displays, but again, I need to check.John Westlake wrote: ↑Wed Dec 20, 2017 10:43 pmJust to confirm that the new graphics driver works with the DSI+HDMI with independent displays concurrently on each display interface? - if so, this would be brilliant news as my rather limited understanding is that the most difficult task is to enable a second framebuffer in the GPU Driver.
Once the second framer buffer is available then it can be assigned to a physical port (DSI / DPI / HDMI etc) in Xorg. (Again, I stress I'm only a hardware guy so I could be misguided).
Getting DPI working is easier then DSI on the RPi - the DPI is a very simple interface and is the most cost effective "local" display option - for smaller Qtys. DSI is a bag of hurt.
Going to be the new year before I can look at this. In general we are going to need to do a lot of work to get multiple display up and running using the standard graphics driver, so I don't think it is going to be quick from that perspective, but using the new driver may work fairly quickly, but its does have issues. So, again, not a quick fix.
Been off sick since Xmas, but am thinking about it. Fortunately, we do have an internal requirement for this, so is fairly certain to be done.
It's a combination of things that needs to be done - I need to update the GPU firmware to handle multiple framebuffers, since it was original written with only one in mind, then expose to Linux and update the Linux FB driver to cope with those multiple underlying framebuffers.John Westlake wrote: ↑Wed Jan 10, 2018 10:40 amWell thats to be expect - its hard to predicate how long something like this will take - it will be done when its done!
As a designer, nothing irritates me more then when people ask me to developed a new design then ask how long it will take - if I knew, then I'd not have to develop anything because it would be already conceived!
If you need any help - just ping me, we might be able to help as in the area I'm surrounded by RedHat programmers.
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