On Thu, 25 May 2023 at 04:41, Bjorn Andersson <andersson@xxxxxxxxxx> wrote: > > On Wed, May 24, 2023 at 11:56:28AM +0200, Ulf Hansson wrote: > > On Mon, 24 Apr 2023 at 13:09, Maulik Shah <quic_mkshah@xxxxxxxxxxx> wrote: > > > > > > Changes in v4: > > > - Add missing s-o-b line and reviewed by in patch 1 > > > - Address ulf's comments for error handling in patch 2 > > > > > > Changes in v3: > > > - Add new change to provide helper function dt_idle_pd_remove_topology() > > > - Address ulf's comments for error handling > > > - Add reviewed by ulf for devicetree change > > > > > > Changes in v2: > > > - Add new change to Move enabling OSI mode after power domains creation > > > - Fix compatible string to domains-idle-states for cluster idle state. > > > - Update cover letter with some more details on OSI and PC mode > > > comparision > > > > > > The dependency [2] is now merged in trustedfirmware project. > > > > > > Stats comparision between OSI and PC mode are captured at [3] with > > > usecase > > > details, where during multiple CPUs online the residency in cluster idle > > > state is better with OSI and also inline with single CPU mode. In PC > > > mode > > > with multiple CPUs cluster idle state residency is dropping compare to > > > single CPU mode. > > > > > > Recording of this meeting is also available at [4]. > > > > > > This change adds power-domains for cpuidle states to use PSCI OS > > > initiated mode for sc7280. > > > > > > This change depends on external project changes [1] & [2] which are > > > under review/discussion to add PSCI os-initiated support in Arm Trusted > > > Firmware. > > > > > > I can update here once the dependency are in and change is ready to > > > merge. > > > > > > [1] https://review.trustedfirmware.org/q/topic:psci-osi > > > [2] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/19487 > > > [3] https://www.trustedfirmware.org/docs/PSCI-OS-initiated.pdf > > > [4] https://www.trustedfirmware.org/meetings/tf-a-technical-forum > > > > > > Maulik Shah (3): > > > cpuidle: dt_idle_genpd: Add helper function to remove genpd topology > > > cpuidle: psci: Move enabling OSI mode after power domains creation > > > arm64: dts: qcom: sc7280: Add power-domains for cpuidle states > > > > > > arch/arm64/boot/dts/qcom/sc7280.dtsi | 98 ++++++++++++++++++++------- > > > drivers/cpuidle/cpuidle-psci-domain.c | 39 ++++------- > > > drivers/cpuidle/dt_idle_genpd.c | 24 +++++++ > > > drivers/cpuidle/dt_idle_genpd.h | 7 ++ > > > 4 files changed, 117 insertions(+), 51 deletions(-) > > > > > > > Looks like this series has not been queued up yet. Note that patch1 > > and patch2 are needed for stable kernels too. Moreover, patch3 (Qcom > > DTS change) is dependent on patch 1 and patch2. > > > > Therefore I suggest Bjorn to pick this up via the Qcom SoC tree. > > Bjorn, is that okay for you? > > > > Sorry, this fell between the chairs after you pointed me to it... > > I can certainly pick the 3 patches through my tree, but are they fixing > any current regressions, or is it just that we need the first two > patches to land before the 3rd patch? I am not aware of any current regressions. > > I also presume the 3rd patch is only needed when paired with the new > ATF? Patch3 is beneficial to use with a new TF-A, but works with an old TF-A too. Anyway, forget what I said about patch3 earlier, as that was just not the complete information. The problem is that we can't be using a new TF-A (supporting both PSCI OSI and PC mode) without patch1 and patch2, unless we are using patch3. Thus, I strongly suggest we tag patch1 and patch2 for stable kernels, to avoid any potential conflicts of TF-A versions that may be used. > > Regards, > Bjorn Did that make more sense? Br Uffe
