Hi Hans, On 24 December 2014 at 09:47, Hans de Goede <hdego...@redhat.com> wrote: > Hi, > > On 23-12-14 05:36, Simon Glass wrote: >> >> Hi Hans, >> >> On 22 December 2014 at 09:45, Hans de Goede <hdego...@redhat.com> wrote: >>> >>> Hi, >>> >>> On 21-12-14 19:52, Simon Glass wrote: >>>> >>>> >>>> Hi, >>>> >>>> I ran up a banana PI and noticed that HDMI works in U-Boot. Great! >>>> >>>> Scrolling seems very slow though - is the L2 cache disabled perhaps? >>> >>> >>> >>> I don't think so, but it could be, I think the scrolling code is just >>> very inefficient. Feel free to poke things a bit around this, ARM >>> cache management is not my forte. >> >> >> I think it need ssomething like the code in exynos/soc.c - see >> v7_outer_cache_enable(). >> >> Even with the 7 inch it's very slow. > > > I've run some tests, and it is not slower then on say the A10 (cortex A8), > also I've been unable to find any docs or allwinner code pointing to > allwinner specific l2 cache init. As such ATM I do not believe that we've > the l2 cache disabled.
Yes the code is not super-efficient (and could use the arch-specific memcpy()) but I'm mostly interested in whether the platform is running at full speed. I'm comparing it to say an Exynos 5250 which is 1.7GHz Cortex-A15. Without the L2 cache it scrolls quite slowly but with it it is fast. There is probably some cache setup required. Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
