Re: Beagleboard xM crashes when being set to 800MHz with smartreflex on linux-omap-3.6-rc6
2012/10/2 Kevin Hilman khil...@deeprootsystems.com: Maximilian Schwerin maximilian.schwe...@tigris.de writes: Hi, I've just built a linux-omap kernel at 3.6-rc6 using omap2plus_defconfig as basis for the kernel config. When I enable smartreflex and switch to 800MHz via echo 1 /sys/kernel/debug/smartreflex/smartreflex_core/autocomp echo 1 /sys/kernel/debug/smartreflex/smartreflex_mpu_iva/autocomp cpufreq-set -f 800MHz the board crashes. If I switch to 800MHz and enable smartreflex later nothing happens. This used to work in my 3.3 based kernel. SmartReflex is kwown to be unstable in mainline and there are several errata that still need fixing for it to be stable. I strongly recommend you simply leave SR disabled. Does it apply to a device always at opp1G ? Ie if I boot @1GHz and then enable smart reflex, is it ok ? Kevin -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Beagleboard xM crashes when being set to 800MHz with smartreflex on linux-omap-3.6-rc6
Maximilian Schwerin maximilian.schwe...@tigris.de writes: Hi, I've just built a linux-omap kernel at 3.6-rc6 using omap2plus_defconfig as basis for the kernel config. When I enable smartreflex and switch to 800MHz via echo 1 /sys/kernel/debug/smartreflex/smartreflex_core/autocomp echo 1 /sys/kernel/debug/smartreflex/smartreflex_mpu_iva/autocomp cpufreq-set -f 800MHz the board crashes. If I switch to 800MHz and enable smartreflex later nothing happens. This used to work in my 3.3 based kernel. SmartReflex is kwown to be unstable in mainline and there are several errata that still need fixing for it to be stable. I strongly recommend you simply leave SR disabled. Kevin -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Beagleboard xM crashes when being set to 800MHz with smartreflex on linux-omap-3.6-rc6
On Fri, Sep 21, 2012 at 9:45 AM, Maximilian Schwerin maximilian.schwe...@tigris.de wrote: Hi, I've just built a linux-omap kernel at 3.6-rc6 using omap2plus_defconfig as basis for the kernel config. When I enable smartreflex and switch to 800MHz via echo 1 /sys/kernel/debug/smartreflex/smartreflex_core/autocomp echo 1 /sys/kernel/debug/smartreflex/smartreflex_mpu_iva/autocomp cpufreq-set -f 800MHz the board crashes. If I switch to 800MHz and enable smartreflex later nothing happens. This used to work in my 3.3 based kernel. Regards, Maximilian Also happens with N900 when changing frequency. -JL -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Beagleboard xM crashes when being set to 800MHz with smartreflex on linux-omap-3.6-rc6
On Fri, Sep 21, 2012 at 1:45 AM, Maximilian Schwerin maximilian.schwe...@tigris.de wrote: Hi, I've just built a linux-omap kernel at 3.6-rc6 using omap2plus_defconfig as basis for the kernel config. When I enable smartreflex and switch to 800MHz via echo 1 /sys/kernel/debug/smartreflex/smartreflex_core/autocomp echo 1 /sys/kernel/debug/smartreflex/smartreflex_mpu_iva/autocomp cpufreq-set -f 800MHz the board crashes. If I switch to 800MHz and enable smartreflex later nothing happens. This used to work in my 3.3 based kernel. btw, once it locks up... retry with your 3.3 based kernel (hold reset and swap sd card's, the bug should lock up again when trying to set 800Mhz on bootup.. In my testing, once it locks up, any cpufreq enabled kernel will keep locking up... Makes you wonder if a pll setting isn't getting reset on bootup...) I've traced it to the arch_clock-clk_set_rate(clk, rate); call in the int clk_set_rate(struct clk *clk, unsigned long rate) function http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=arch/arm/plat-omap/clock.c;hb=HEAD#l132 at that point, I'm a little lost in the omap36xx code.. Regards, -- Robert Nelson http://www.rcn-ee.com/ -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Beagleboard xM crashes when being set to 800MHz with smartreflex on linux-omap-3.6-rc6
* Maximilian Schwerin maximilian.schwe...@tigris.de [120920 23:46]: Hi, I've just built a linux-omap kernel at 3.6-rc6 using omap2plus_defconfig as basis for the kernel config. When I enable smartreflex and switch to 800MHz via echo 1 /sys/kernel/debug/smartreflex/smartreflex_core/autocomp echo 1 /sys/kernel/debug/smartreflex/smartreflex_mpu_iva/autocomp cpufreq-set -f 800MHz the board crashes. If I switch to 800MHz and enable smartreflex later nothing happens. This used to work in my 3.3 based kernel. I'm suspecting that this is because of all the missing PM errata we don't have in the mainline kernel :( I think we're missing at least the following based on a quick grep of the Nokia patched PM code: - 3430 (and 3630?) hs omap cs1 off-idle bug where save/restore needs to be in lowmem - 3630 retention idle is missing errata handling for 1.85/i581 - 3630 off idle is missing 1.87 handling - smartreflex missing twl4030 errata? - Nokia patched PM code mentions also quite a few other missing errata such as 1.88, 1.142, i582, i467, i468, 1.164 This may be a bit out of date as it's based on some notes I made few months ago after I started noticing flakeyness on my 3630 zoom3 board. Regards, Tony -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
