Gene, I just completed building Linux-4.19.25-rt16 (PREEMPT_RT) for the Pine64 A64+. It was relatively speaking a piece of cake. They are now using the mainline kernel for the Pine64 A64+. So it was just download the mainline kernel sources for 4.19.25 and the Preempt_rt patches, apply them, make the oldconfig then make menuconfig. Setup preempt_rt and compile. The biggest problem was figuring out what commands to use with the Makefile and the install commands. The directories that others have used seem to have changed. So insuring that I created the appropriate symbolic links was a little worrisome. But once I had it all set up, it booted correctly the very first time. I ran cyclictest and it reported an average latency of about 8uS, with a worst case of about 63uS.
I don’t have a Rock64 or a RockPro64 yet but my guess is that it wouldn’t be too difficult either. My understanding is that they now both use the mainline kernel. Once I can build a preempt_rt kernel for the RockPro64, I’ll let you know what is involved. My understanding is that the Mali drivers are/were a work-in-progress. I don’t know where they are in terms of current usability. Alan > From: Gene Heskett <ghesk...@shentel.net> > Subject: Re: [Emc-users] Mali Drivers are Open Source Now > Date: March 9, 2019 at 4:05:07 PM PST > To: emc-users@lists.sourceforge.net > > > On Saturday 09 March 2019 15:45:57 bari wrote: > >> http://linux-sunxi.org/Mali >> >> This is good news if you want a totally open source system using many >> of the Allwinner or Rockchop multicore ARM SOC's for Linuxcnc. >> >> Needs no funny binary blob like the Rpi for boot ot GPU. >> >> -Bari >> > Typical, too little, too late. The rock64 is probably sold out 6 months > ago, and the rockchip-pro has replaced it. But haveing bought the > rochchip koolaid, I'll not waste any more $ until they are willing to > release some of the build tools. But so far, those have been top secret > and apparently proprietary, questions ignored, so I've not been able to > do anything with what acts like a fine & 20x speedier rpi3, with 4GB of > ram for 10 bucks more than the rpi kit. So now its me with the wait and > see attitude. > >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
