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4332 discussions

2012/7/25 Linaro Android Platform Team meeting agenda posted

by Zach Pfeffer

Linaro Android platform team agenda posted to https://wiki.linaro.org/Platform/Android/Meetings/2012-07-25. 13:00 UTC in #linaro-meeting on irc.freenode.net on 2012/7/25. We’re going to present our JB upgrade plan (basically put the kernels we’re currently using into the builds and start fixing stuff). -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

14 years

[PATCH v2 0/2] Add v4l2 subdev driver for S5K4ECGX sensor with embedded SoC ISP

by Sangwook Lee

The following 2 patches add driver for S5K4ECGX sensor with embedded ISP SoC, and minor v4l2 control API enhancement. S5K4ECGX is 5M CMOS Image sensor from Samsung. Changes since v1: - fixed s_stream(0) when it called twice - changed mutex_X position to be used when strictly necessary - add additional s_power(0) in case that error happens - update more accurate debugging statements - remove dummy else Sangwook Lee (2): v4l: Add factory register values form S5K4ECGX sensor v4l: Add v4l2 subdev driver for S5K4ECGX sensor drivers/media/video/Kconfig | 7 + drivers/media/video/Makefile | 1 + drivers/media/video/s5k4ecgx.c | 881 ++++++++++ drivers/media/video/s5k4ecgx_regs.h | 3121 +++++++++++++++++++++++++++++++++++ include/media/s5k4ecgx.h | 29 + 5 files changed, 4039 insertions(+) create mode 100644 drivers/media/video/s5k4ecgx.c create mode 100644 drivers/media/video/s5k4ecgx_regs.h create mode 100644 include/media/s5k4ecgx.h -- 1.7.9.5

14 years

[PATCH 0/2] ST-Ericsson db8500 thermal driver patch set

by hongbo.zhang

From: "hongbo.zhang" <hongbo.zhang(a)linaro.com> Hi all, This is the ST-Ericsson db8500 thermal dirver, here are some notes of this patch set: 1. 0001-Remove-un-necessary-variable-checking.patch is a trivial update of the thermal framework. 0002-ST-Ericsson-db8500-thermal-dirver.patch is the ST-Ericsson db8500 thermal dirver. 2. Since there is no PRCMU interface to read temperature directly, the PRCMU interrupts are used instead, and a pseudo current temperature is returned, but this works for the thermal management framework. This can be updated when the corresponding PRCMU interface is available. 3. As suggested by Vincent Guittot, the cooling device codes are seperated from thermal zone, this makes it easy to add/remove other cooling devices. CPU frequency limiting is the current cooling device. 4. The driver isn't added into device tree currently, this can be done soon if needed. hongbo.zhang (2): Remove un-necessary variable checking ST-Ericsson db8500 thermal dirver arch/arm/configs/u8500_defconfig | 4 + arch/arm/mach-ux500/board-mop500.c | 69 ++++ drivers/thermal/Kconfig | 20 ++ drivers/thermal/Makefile | 4 +- drivers/thermal/cpu_cooling.c | 3 +- drivers/thermal/db8500_cpufreq_cooling.c | 167 +++++++++ drivers/thermal/db8500_thermal.c | 476 ++++++++++++++++++++++++++ include/linux/platform_data/db8500_thermal.h | 39 +++ 8 files changed, 779 insertions(+), 3 deletions(-) create mode 100644 drivers/thermal/db8500_cpufreq_cooling.c create mode 100644 drivers/thermal/db8500_thermal.c create mode 100644 include/linux/platform_data/db8500_thermal.h -- 1.7.10

14 years

join the linaro maillist

by Hongjane Fang

I want to join the linaro-dev maillist,help...

14 years

Ubuntu Developer Week

by Ricardo Salveti

Hey, Amber just reminded me about the the Ubuntu Developer Week, and pointed out that we'll have another one from Tue 28th Aug to Thu 30th Aug. Here's the blog post with more details: http://ubuntuclassroom.wordpress.com/2012/07/17/ubuntu-developer-week-plann… As we're also involved with topics involving Ubuntu development, it'd be nice if we could also be part of it, or at least request a few topics to be covered. In case you want to learn things specifically with Ubuntu, also let us know, so we can try to have someone to cover such topic. The sessions happens at IRC, and they are quite useful for people wanting to know more about how the development of Ubuntu happens. Now for the Dev Plat team, anything specifically you want to cover? Package cross build and multi-arch would be interesting to have. John, guess you could also demonstrate how we're packaging up our kernels, and how people can easily generate debian packages for any tree they want. Thanks, -- Ricardo Salveti de Araujo

14 years

[PATCH] sched: Use device-tree to provide fast/slow CPU list for HMP

by Jon Medhurst (Tixy)

We can't rely on Kconfig options to set the fast and slow CPU lists for HMP scheduling if we want a single kernel binary to support multiple devices with different CPU topology. E.g. ARM's TC2, Fast Models, or even non big.LITTLE devices. This patch adds the function arch_get_fast_and_slow_cpus() to generate the lists at run-time by parsing the CPU nodes in device-tree; it assumes slow cores are A7s and everything else is fast. The function still supports the old Kconfig options as this is useful for testing the HMP scheduler on devices without big.LITTLE. Signed-off-by: Jon Medhurst <tixy(a)linaro.org> --- The reason I'm pushing this patch is that I want to use it for this month's Linaro vexpress release to help with the goal of having a single build which will work on all CoreTiles (and possibly Fast Models). arch/arm/kernel/topology.c | 69 ++++++++++++++++++++++++++++++++++++++++++++ kernel/sched/fair.c | 18 ++++-------- 2 files changed, 75 insertions(+), 12 deletions(-) diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index f59193c..61302df 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -287,6 +287,75 @@ void store_cpu_topology(unsigned int cpuid) cpu_topology[cpuid].socket_id, mpidr); } + +#ifdef CONFIG_SCHED_HMP + +static const char * const little_cores[] = { + "arm,cortex-a7", + NULL, +}; + +static bool is_little_cpu(struct device_node *cn) +{ + const char * const *lc; + for (lc = little_cores; *lc; lc++) + if (of_device_is_compatible(cn, *lc)) + return true; + return false; +} + +void __init arch_get_fast_and_slow_cpus(struct cpumask *fast, + struct cpumask *slow) +{ + struct device_node *cn = NULL; + int cpu = 0; + + cpumask_clear(fast); + cpumask_clear(slow); + + /* + * Use the config options if they are given. This helps testing + * HMP scheduling on systems without a big.LITTLE architecture. + */ + if (strlen(CONFIG_HMP_FAST_CPU_MASK) && strlen(CONFIG_HMP_SLOW_CPU_MASK)) { + if (cpulist_parse(CONFIG_HMP_FAST_CPU_MASK, fast)) + WARN(1, "Failed to parse HMP fast cpu mask!\n"); + if (cpulist_parse(CONFIG_HMP_SLOW_CPU_MASK, slow)) + WARN(1, "Failed to parse HMP slow cpu mask!\n"); + return; + } + + /* + * Else, parse device tree for little cores. + */ + while ((cn = of_find_node_by_type(cn, "cpu"))) { + + if (cpu >= num_possible_cpus()) + break; + + if (is_little_cpu(cn)) + cpumask_set_cpu(cpu, slow); + else + cpumask_set_cpu(cpu, fast); + + cpu++; + } + + if (!cpumask_empty(fast) && !cpumask_empty(slow)) + return; + + /* + * We didn't find both big and little cores so let's call all cores + * fast as this will keep the system running, with all cores being + * treated equal. + */ + cpumask_setall(fast); + cpumask_clear(slow); +} + +#endif /* CONFIG_SCHED_HMP */ + + /* * init_cpu_topology is called at boot when only one cpu is running * which prevent simultaneous write access to cpu_topology array diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index f705a87..e056361 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3084,25 +3084,19 @@ done: #ifdef CONFIG_SCHED_HMP /* Heterogenous multiprocessor (HMP) optimizations - * We need to know which cpus that are fast and slow. Ideally, this - * information would be provided by the platform in some way. For now it is - * set in the kernel config. */ + * We need to know which cpus that are fast and slow. */ static struct cpumask hmp_fast_cpu_mask; static struct cpumask hmp_slow_cpu_mask; -/* Setup fast and slow cpumasks. - * This should be setup based on device tree somehow. */ +extern void __init arch_get_fast_and_slow_cpus(struct cpumask *fast, + struct cpumask *slow); + +/* Setup fast and slow cpumasks. */ static int __init hmp_cpu_mask_setup(void) { char buf[64]; - cpumask_clear(&hmp_fast_cpu_mask); - cpumask_clear(&hmp_slow_cpu_mask); - - if (cpulist_parse(CONFIG_HMP_FAST_CPU_MASK, &hmp_fast_cpu_mask)) - WARN(1, "Failed to parse HMP fast cpu mask!\n"); - if (cpulist_parse(CONFIG_HMP_SLOW_CPU_MASK, &hmp_slow_cpu_mask)) - WARN(1, "Failed to parse HMP slow cpu mask!\n"); + arch_get_fast_and_slow_cpus(&hmp_fast_cpu_mask, &hmp_slow_cpu_mask); printk(KERN_DEBUG "Initializing HMP scheduler:\n"); cpulist_scnprintf(buf, 64, &hmp_fast_cpu_mask); -- 1.7.10.4

14 years

trying to join linaro_omap4_ubuntu_panda_maillist

by Hongjane Fang

omap4,pandaboard,linaro-dev maillist

14 years

[Powertop][PATCH v3] conditionally disable pci if not supported

by Rajagopal Venkat

disable pci if not supported by host platform. When libpci is not found, define a macro which will be used for conditional compilation. Signed-off-by: Rajagopal Venkat <rajagopal.venkat(a)linaro.org> --- configure.ac | 5 +++-- src/lib.cpp | 20 ++++++++++++++++++-- src/lib.h | 5 +++++ 3 files changed, 26 insertions(+), 4 deletions(-) diff --git a/configure.ac b/configure.ac index 4da4eea..3cbc7b0 100644 --- a/configure.ac +++ b/configure.ac @@ -48,8 +48,9 @@ AC_CHECK_FUNCS([fdatasync getpagesize gettimeofday memmove memset mkdir munmap p AC_SEARCH_LIBS([delwin], [ncursesw ncurses], [], AC_MSG_ERROR([ncurses is required but was not found]), []) PKG_CHECK_MODULES([PCIUTILS], [libpci],[],[ - AC_SEARCH_LIBS([pci_get_dev], [pci], [], AC_MSG_ERROR([libpci is required but was not found]), []) -]) + AC_SEARCH_LIBS([pci_get_dev], [pci], [], AC_DEFINE([HAVE_NO_PCI],[1],[Define if pci is not supported]), []) +]) + PKG_CHECK_MODULES([LIBZ], [zlib],[],[ AC_SEARCH_LIBS([deflate], [z], [], AC_MSG_ERROR([zlib is required but was not found]), []) ]) diff --git a/src/lib.cpp b/src/lib.cpp index 0f87e48..77e49a2 100644 --- a/src/lib.cpp +++ b/src/lib.cpp @@ -35,11 +35,13 @@ #include <math.h> #include <stdlib.h> +#include "lib.h" + +#ifndef HAVE_NO_PCI extern "C" { #include <pci/pci.h> } - -#include "lib.h" +#endif #include <stdio.h> #include <stdint.h> @@ -266,6 +268,7 @@ void format_watts(double W, char *buffer, unsigned int len) } +#ifndef HAVE_NO_PCI static struct pci_access *pci_access; char *pci_id_to_name(uint16_t vendor, uint16_t device, char *buffer, int len) @@ -290,6 +293,19 @@ void end_pci_access(void) pci_free_name_list(pci_access); } +#else + +char *pci_id_to_name(uint16_t vendor, uint16_t device, char *buffer, int len) +{ + return NULL; +} + +void end_pci_access(void) +{ +} + +#endif /* HAVE_NO_PCI */ + int utf_ok = -1; diff --git a/src/lib.h b/src/lib.h index 588c023..7093b7f 100644 --- a/src/lib.h +++ b/src/lib.h @@ -30,6 +30,11 @@ #endif #include <stdint.h> +/* Include only for Automake builds */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + #ifndef DISABLE_I18N #define _(STRING) gettext(STRING) #else -- 1.7.9.5

14 years

Jenkins-based CI services were migrated to use pre-configured custom EC2 AMIs

by Paul Sokolovsky

Hello, Over lifetime of Linaro CI services, we've been experiencing number of episodes when service stability was influenced by Ubuntu package mirror issues, with it being used to configure each and every build slave, usually dozen times a day. Linaro Infrastructure team and CI service stakeholders tried different approaches to solve this issue, and over time we come to conclusion that sustainable way to do it is to maintain custom Amazon Machine Images (AMI) with preinstalled packages, which will simply cut the dependency on Ubuntu mirror's 100% availability. In addition to that, they also speed up build startup time noticeably. A special tool, linaro-ami, was developed to help maintain custom AMIs, with two main requirements being centralized configuration location for EC2 admins control, as well as being easy to use for individual custom AMI maintainers. We still may need to improve UI functionality for the latter, and would need stakeholder feedback for that, but otherwise the tool seems to work pretty well. It is available as part of linaro-aws-tools project, https://launchpad.net/linaro-aws-tools . The README is available at http://bazaar.launchpad.net/~linaro-aws-devs/linaro-aws-tools/trunk/view/he… ci.linaro.org and android-build.linaro.org has been already switched to new custom AMIs. Using custom AMIs for CBuild service is under consideration by Toolchain group. So, from this point on, it's important that all stakeholders follow build slave configuration change process centered around linaro-ami tool: any package set changes should be applied to slave init script (as referenced in linaro-ami config), a new version of corresponding AMI generated, and Jenkins configuration updated with new AMI ID. (No package installation should be happen directly in Jenkins.) The Infrastructure team can help with maintaining AMIs, and is open for suggestions on improving new setup. Thanks, Paul Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

14 years

Raspbian's hard float benchmarks

by Michael Hope

The Raspbian project is a rebuild of Debian for the Raspberry Pi. adama did some benchmarks that show the improvement in going from ARMv4T with soft float to ARMv6 with hard float: http://www.memetic.org/raspbian-benchmarking-armel-vs-armhf/ The page says that there's a 4-10 % improvement on integer programs and up to 40 % on floating point programs. It's hard to tell the new instruction vs pipeline influence and if the baseline is soft float or softfp/VFP based. -- Michael

14 years

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