July 09, 2020, 04:19:48 am


Have you visited the Allwinner Chipset wiki? - http://linux-sunxi.org/

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i used this guide http://linux-sunxi.org/Binary_drivers , xf86-video-fbturbo compiled without problems in Gentoo
Quote from: rose28357 on December 18, 2013, 07:53:53 am
How did you change the pll4-setting etc ? In the FEX-File ?

mali_clkdiv in the fex-file .
pll and voltages in kernel source tree :
pll4 - arch/arm/mach-sun4i/clock/clock.c
volts - arch/arm/plat-sunxi/cpu-freq/cpu-freq-table.c

with above kernel mod it works even at 1248, but i'm not tested it strictly at this freq
Sunxi has not pushed all their stuff up into the mainstream kernel, so you need 3.4.xx from sunxi .
I have Gentoo on nand, works good. Kernel compilation takes about one hour.
I have pll4=720 and mali_clkdiv=2 (720/2=360)
for cpu at 1200, edit cpu-freq-table.c and add :
{.freq = 1200000000, .volt = 1650},
{.freq = 1152000000, .volt = 1600},
{.freq = 1104000000, .volt = 1550},

works stable