Date: Sat, 26 Sep 2020 14:39:34 +0100 From: tech-lists <tech-lists@zyxst.net> To: freebsd-arm@freebsd.org Subject: Re: RPi4B u-boot based booting and hw.cpufreq.voltage_core and dev.cpu.0.freq use: able to use 2000 MHz Message-ID: <20200926133934.GD54660@bastion.zyxst.net> In-Reply-To: <0578EC2B-D21C-46AA-AD3E-CD13985B18FA@yahoo.com>
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[-- Attachment #1 --] On Sat, Sep 26, 2020 at 12:37:45AM -0700, Mark Millard via freebsd-arm wrote: >I got access to a 4 GiByte RPi4B that does not have modernized >eeprom contents. With it I was able to do a u-boot based boot >of head -r365932 based on the msdosfs on a older microsd card >that had materials from 2020-Jul-13 (u-boot.bin) and 14 (RPi4B >materials). I updated EFI/BOOT/bootaa64.efi . The u-boot.bin >is from my build of sysutils/u-boot-rpi4/ (no local changes). > >In this context . . . > >I added over_voltage=6 and arm_freq=2000 to config.txt and it >ends up looking like: > >arm_control=0x200 >arm_64bit=1 >dtoverlay=disable-bt >dtoverlay=mmc >device_tree_address=0x4000 >kernel=u-boot.bin >armstub=armstub8-gic.bin >over_voltage=6 >arm_freq=2000 > > >Booting based on that resulted in: > >dev.bcm2835_cpufreq.0.freq_settings: 2000/-1 600/-1 >dev.cpu.0.freq_levels: 2000/-1 600/-1 >dev.cpu.0.freq: 600 > >And: > ># sysctl dev.cpu.0.freq=2000 >dev.cpu.0.freq: 600 -> 2000 > >worked. (Without the over_voltage it reports 600 and then >hangs.) Having /etc/sysctl.conf list dev.cpu.0.freq=2000 >works. Exellent! On the basis of your post I went ahead and removed from config.txt three lines, then added two and rebooted. It's now this: arm_control=0x200 arm_64bit=1 dtoverlay=disable-bt dtoverlay=mmc device_tree_address=0x4000 kernel=u-boot.bin armstub=armstub8-gic.bin over_voltage=6 arm_freq=2000 before, when it didn't work, it had this: [same as above], apart from gpu_mem=16 over_voltage=6 arm_freq=2100 In creating the freebsd instance I followed these instructions for 8GB https://lists.freebsd.org/pipermail/freebsd-arm/2020-August/022162.html and applied D26344. /etc/rc.conf has powerd loaded I was particularly interested in getting this clocked to a reasonable speed as it's used to build packages with poudriere based on arm7 and aarch64 for -current. seems very stable so far: 2:36p.m. up 45 mins, 1 user, load averages: 6.51, 3.57, 2.92 Sat 26 Sep 2020 14:36:14 BST dev.cpu.0.temperature: 65.0C dev.cpu.0.freq_levels: 2000/-1 600/-1 dev.cpu.0.freq: 2000 rpi4 is in a FLIRC case for cooling, no fan. 24 degC/44%rh ambient. best, -- J. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE8n3tWhxW11Ccvv9/s8o7QhFzNAUFAl9vRKYACgkQs8o7QhFz NAWxuQ/7Bqg0vRfSo0jVeZ3e/Z3Y63koH62IjFEetyUmUtSj6jEo6MX1Mfk61do+ NJcgN95eiSlabkLIhfdJ/aYQ0iK+DP556i5HdOlaa93uHO7nAqE3Y6iLhMw5Wwz5 jpy0m+8AHjKi23ZlGo5/WzzeaNyv8DdSKqMpRYCIFe1ubZq5+k1oZRAu2fspxIqt n/dyyis2Lbk/NRS3lZZ4Jd5tNalV2f+AtZcxVKSICDbquvxesX9HHKjt9fej0L+c bZmPQcnNvleDKlJbzTciWSRJoFdov4AzJg5pr+s4NGuYOgPw3ws8p4nSeZE2BMBp CBg966kPQlImSC+nY95IGpbA1BOfp04WdWBYncxsc1kOGXYAsD0PF7TsH9XK9CzM ys0XMsFuhDRnsEK6DvMc9BIe71i/9y/cCpPPGQIoBdSZr5nyEcZh28/Ld0fw2VBk Ls6Fu41Yko/jqPFu+ZKBDww1CFJMDbfDrjJQueKN39f+I0cQ+7aYMN14XacRWzhm LScS2WYllVqWYNYEhT21dUrry4nKDCDTkhBvqExaFzsKAajcJ0RejBWQbd9eVGmR BQpT75DcE1dDy0r3fWjBtd/B4n+8RKlgrl7vMFYscOqFNEiZEfSaSWRY330x/8kh RBDp62JNGqjOcOUaM+b63ufshbVTocvyfwfQYfs3XryRATaDzbg= =Ehh6 -----END PGP SIGNATURE-----home | help
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