The minutes of the weekly call can be found at:
https://wiki.linaro.org/WorkingGroups/PowerManagement/Meetings/2010-08-18
Attendees:
Linaro: Amit Kucheria, Amit Arora, Yong Shen ARM: Robin Randhawa
== Agenda == * Review action items from last meeting * Blueprint status * HW governers * Powerdebug - Amit A and Yong to co-operate on the list of info we've noted in the Master Task List against powerdebug * hwmon not much used * camera goes to v4l * battery goes to supply class * omap4 - temperature sensor exported to hwmon * power supply class support to be added
== Action Items from this Meeting == * ACTION: Amit A to test on pm enabled OMAP3 board * ACTION: Amit A to document details on power supply class (battery info) to PowerTOP internal wiki page * ACTION: Yong to look into getting powertop kernel patches applied to Linaro kernel tree * ACTION: Robin to send links to patches sent to linux-pm * ACTION: Amit K to spend some time on usecase to reproduce ondemand governor problems * ACTION: Yong to look at common clock FW, find out if debug info being exported (usage count, clk rate, dependencies)
== Action Items from Previous Meeting == * ACTIVE (Immediate): * ACTION: Robin and Srinivas to target the ftrace patches for upstream.: * Srinivas to clarify what tree/branch is being used for this work: DONE * ARM to sit on patches, perhaps get TI to carry them. * ACTION: Amit A to get review and then post powertop patches to powertop list upstream: DONE * New ACTION: Amit A to test on pm enabled OMAP3 board * ACTION: Amit A to look at power supply framework * New ACTION: Amit A to document details on power supply class (battery info) to PowerTOP internal wiki page * ACTION: Amit K to look at getting powertop kernel patches applied to Linaro kernel tree: Carry forward * New ACTION: Yong to look into this * ACTION: Vishwa to send instrumentation patches to linaro-dev: DONE * ACTION: Vishwa to send usecase to reproduce ondemand governor problems: Tranferred to Amit K * New ACTION: Robin to send link to some interesting patches from linux-pm * ACTION: Amit K to spend some time on usecase to reproduce ondemand governor problems: Carry forward
* ACTIVE (Long Term) : * ACTION: Srinivas to provide details of where he believes userspace - kernel interaction is required. (low prio) * ACTION: Bobby to check on multi-core boards availability (request open) * ACTION: ARM to discuss giving out internal Eclipse based tool (similar to powertop) (no ETA as of now) * ACTION: Amit Kucheria and Vishwa to get inputs from community on the issues related to CPUIDLE governor: POSTPONED until instrumentation work
* DORMANT : * ACTION: ARM to share internal instrumentation flow (BAB: we might also align with Linaro on workload discussions) * Might take couple of months * ACTION: Amit K to talk to jeremy about power domain framework: DONE * Jeremy needs help, will revisit in a few weeks
== Minutes == * Vishwa and Srinivas on holidays * Powerdebug: * Start a wiki page to note findings (amit a) * ACTION: Yong to look at common clock FW, find out if debug info being exported (usage count, clk rate, dependencies) * Add code to powerdebug to read this debug information * Power management differentiation * Discussion with Robin from ARM about common frameworks * Robin not convinced about all the consolidation effort, since some of it is seen as competetive differentiator * Amit K believes Mechanism should be common amongst vendors so that can use common tools and design patterns. * Policies can be different to allow differentiation * e.g. have a cpufreq and cpuidle driver allows all vendors to use powertop tool. If current frameworks don't suit the needs, we can work with upstream to extend them.