#arm-netbook on 2016-08-02 — irc logs at freenode.irclog.whitequark.org

2013-02-27 01:11 lkcl changed the topic of #arm-netbook to: arm-netbook: Don't ask to ask. Just ask! - EOMA68 spec http://bit.ly/ZHqfxA - ML arm-netbook@lists.phcomp.co.uk - Logs http://bit.ly/XELKJq or http://bit.ly/15OCYPD - For Allwinner/sunxi discussions prefer #linux-sunxi - iMX6 Card http://bit.ly/XAUGCD - Flying Squirrel http://bit.ly/WgOYaR - Allwinner A10/A20 Card http://bit.ly/zBLAbY - http://rhombus-tech.net

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21:35 <ssvb> lkcl: regarding https://www.crowdsupply.com/eoma68/micro-desktop/updates/picking-a-processor

21:35 <ssvb> realistically, Allwinner A20 is only a 912MHz (!) processor, not 1.2GHz

21:37 <ssvb> see https://linux-sunxi.org/A20#DVFS

21:38 <ssvb> running it at 1008MHz needs core voltage that is beyond what is documented to be safe in the manual (the manual lists 1.4V as the maximum)

21:39 <ssvb> and 1.2GHz is a recipe for trouble, most of the A20 processors are simply unable to run reliable at this clock speed

21:39 <ssvb> have you considered Allwinner H3?

21:49 <lkcl> ssvb: ok appreciated

21:55 <ssvb> lkcl: regarding https://www.crowdsupply.com/eoma68/micro-desktop/updates/mainline-u-boot-and-kernel

21:56 <ssvb> are you using an old and rather convoluted procedure for FEL USB boot, based on the boot0 binary?

21:56 <lkcl> ssvb: gtta go out keep writing i'll be back later

21:56 <ssvb> you can do the same using https://linux-sunxi.org/FEL/USBBoot#Booting_U-Boot_over_USB

21:58 <ssvb> this way you only need a single "u-boot-sunxi-with-spl.bin" file, which is produced by the regular U-Boot build

21:59 <ssvb> there is no need for special 16K stubs and other bits and pieces

22:26 <ssvb> lkcl: regarding the "VPU (CEDAR) which has only been partly reverse-engineered" statement, have you tried https://github.com/linux-sunxi/libvdpau-sunxi ?

22:26 <ssvb> the point is that the most interesting functionality had been *fully* reverse engineered years ago

22:27 <ssvb> you are only missing the video encoding functionality and support for some less common media codecs

22:28 <ssvb> but the H.264 hardware accelerated video decoding works fine

22:30 <ssvb> oh, it had not been ported to the mainline kernel yet, but still you can do hardware accelerated video playback with the 3.4 kernel, using only 100% free software without any blobs

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