Hi, I'm trying to port Linux to a Samsung S3C2416 based system (actually an oscilloscope, http://blog.weinigel.se/2016/05/01/sds7102-hacking.html).
The S3C2416 is a 400MHz ARM9 with a fairly dumb framebuffer, it has some 2D acceleration (pixel/line drawing with alpha, copy rectangle with alpha and/or color key) but as far as I can tell nobody has added Linux support for it. I'm going to need some kind of GUI for the box and somebody mentioned that Weston has framebuffer support nowdays. I turned on the Weston config option in buildroot (2015.5) and managed to get something that didn't work to begin with, the OS abstraction stuff requires support for posix_fadvise but for some reason that didn't work with ulibc but I hacked around that. libinput didn't like eudev and didn't want to recognize a USB keyboard and USB mouse to begin with but I just hardcoded the device type instead of relying on udev to tag the devices. With this I managed to get a desktop and was unable to start wayland-terminal. Redrawing of the graphics felt fairly snappy, but the lag from pressing a key on the keyboard until a character showed up in the terminal was slow, probably between a quarter to half a second. So my question is if this is the performance I should expect with weston on a 400MHz ARM9 and a dumb framebuffer? Have I done something stupid and there are easy ways to speed it up? Is there any documentation on how to convert the framebuffer driver for the S3C2416 to a KMS driver and how to add acceleration support? Can weston use this? Or is wayland/weston not really suited for this kind of old hardware and what should I use in that case? /Christer _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/wayland-devel
