dany/meta-sunxi
1
0
Fork 0
mirror of https://github.com/linux-sunxi/meta-sunxi.git synced 2024-11-08 06:18:22 +01:00
Code Issues Packages Projects Releases Wiki Activity
Official sunxi OpenEmbedded layer for Allwinner-based boards.
231 Commits 30 Branches 0 Tags 13 MiB
C 64.8%
BitBake 18.9%
PHP 9.9%
C++ 3.6%
Batchfile 1.6%
Other 1.1%
a27c9aa7e4
Go to file
Kristof Robot a27c9aa7e4 sdcard_image-sunxi.bbclass: reverting to deploy dir instead of staging dir (resolves #81) 
To resolve the race condition described in #15,
a patch was introduced to use the kernel source from staging dir
rather than deploy dir.

After the reorganization of the kernel source location by
6a1ff0e7ea
this no longer works.

Reverting the previous patch,
and introducing explicit rootfs dependency instead.

Signed-off-by: Kristof Robot <krirobo@gmail.com>
2015-02-01 13:22:11 +01:00
classes sdcard_image-sunxi.bbclass: reverting to deploy dir instead of staging dir (resolves #81) 2015-02-01 13:22:11 +01:00
conf Append the shortened git revision to the u-boot version 2014-10-01 22:42:20 +02:00
recipes-bsp This adds support to build for the Olimex A20-OLinuXino-LIME 2014-09-29 22:19:37 +02:00
recipes-devtools/python python: pyA20 depend on python and only for olimex boards 2014-11-28 17:37:09 +01:00
recipes-graphics libdri2: added missing pkgconfig inherit 2014-11-11 19:55:32 +01:00
recipes-kernel/linux This adds support to build for the Olimex A20-OLinuXino-LIME 2014-09-29 22:19:37 +02:00
recipes-multimedia/gstreamer gst-plugin-cedar: import PoC gstreamer 0.10 plugin 2014-01-16 13:52:23 +01:00
recipes-support/sunxi-tools added A20 to description 2014-09-08 12:16:10 +02:00
COPYING.MIT allwinner-a10: initial import. 2012-06-03 19:47:57 +02:00
README.md README: update email 2014-07-26 14:27:02 +02:00

README.md

meta-sunxi

Official sunxi OpenEmbedded layer for Allwinner-based boards.

This layer depends on the additional layer:

meta-openembedded: git://git.openembedded.org/meta-openembedded

Tested with core-image-base.

Maintainers:

Performance

The default machine settings are meant to be the lowest common denominator, maximizing generality. Significantly better performance (2x-3x) can be achieved with the following settings:

Allwinner A20

For Allwinner A20 (Cubieboard2/CubieTruck), the following tuning options are recommended:

Enable hardfloat, thumb2 and neon capabilities

DEFAULTTUNE = "cortexa7hf-neon-vfpv4"

This tuning profile takes advantage of the Allwinner A20 hardfloat, neon and vfpv4 capabilities.

Change CPU governor to ondemand, and tune settings

echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 336000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo 912000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
#More aggressive
#echo 1008000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo 40 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
echo 200000 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate

This code changes the default CPU governor from fantasy to ondemand, and tunes its settings, as recommended at http://linux-sunxi.org/Cpufreq

For additional discussion, see https://github.com/linux-sunxi/meta-sunxi/issues/25