Regarding memory - I'm not much of the Linux developer - more of a HW engineer, so Linux concepts are still new to me. This with memory security certainly makes sense - I've already seen that something messes up with Disp driver when I modprobe Mali drivers, pretty sure it's memory related as everything is shared as you said. Basically I can't use layers anymore if I use Mali driver, which is just insane and I think UMP and DRM have something to do with it.
Regarding CSI and DISP: as I said - not much of a Linux developer so I cannot actively be involved with the Sunxi stuff. I meant more in this passive way - I've made a thread regarding CSI in which I described my fixes and findings and also this thread where I did post how I solved my issue with overlay. If you look at them, I think you will also have only swearwords, as my fixes are pretty dirty - maybe in a year or two I will be able to contribute to the actual kernel development (obviously some other SoC, as A20 will be dead by then), but I feel that now I would only introduce more problems with my dirty contributions :) It's the same with simplicity - as I'm new to all this, Allwinner's simple drivers are much more suited for me to clean them up compared to Freescale, where everything is so abstract that I needed too much time for some rather simple mods. Regarding HW - I meant that I'm rather pleasantly surprised with the A20, because i.MX6 was full of HW errata and chip revisions. Also a major weak point of i.MX6 is its IPU - it has limitations which renders the image pipeline almost useless (100Mpix / sec max for IPU for instance => no Full-HD @60 fps possible, only 30fps). i.MX6 kernel is full of workarounds for these issues and it's really bloated in some places because of this (IPU split mode for instance - SW workaround for 100 Mpix limit - terrible tearing). In contrast, once something is working on Allwinner, it just works, which I really respect. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
