Messages in this thread | | | Subject | Re: [PATCH v11 0/4] iommu/arm-smmu: Add runtime pm/sleep support | From | Vivek Gautam <> | Date | Fri, 18 May 2018 15:44:01 +0530 |
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Hi Robin,
On 4/9/2018 9:52 AM, Tomasz Figa wrote: > Hi Will, Robin, > > On Thu, Mar 22, 2018 at 7:22 PM Vivek Gautam <vivek.gautam@codeaurora.org> > wrote: > >> This series provides the support for turning on the arm-smmu's >> clocks/power domains using runtime pm. This is done using the >> recently introduced device links patches, which lets the smmu's >> runtime to follow the master's runtime pm, so the smmu remains >> powered only when the masters use it. >> As not all implementations support clock/power gating, we are checking >> for a valid 'smmu->dev's pm_domain' to conditionally enable the runtime >> power management for such smmu implementations that can support it. >> This series also adds support for Qcom's arm-smmu-v2 variant that >> has different clocks and power requirements. >> Took some reference from the exynos runtime patches [1]. >> With conditional runtime pm now, we avoid touching dev->power.lock >> in fastpaths for smmu implementations that don't need to do anything >> useful with pm_runtime. >> This lets us to use the much-argued pm_runtime_get_sync/put_sync() >> calls in map/unmap callbacks so that the clients do not have to >> worry about handling any of the arm-smmu's power. >> Previous version of this patch series is @ [5]. >> [v11] >> * Some more cleanups for device link. We don't need an explicit >> delete for device link from the driver, but just set the flag >> DL_FLAG_AUTOREMOVE. >> device_link_add() API description says - >> "If the DL_FLAG_AUTOREMOVE is set, the link will be removed >> automatically when the consumer device driver unbinds." >> * Addressed the comments for 'smmu' in arm_smmu_map/unmap(). >> * Dropped the patch [10] that introduced device_link_del_dev() API. > As far as I can see, this version addresses all the earlier comments. Do > you think this is something that you could apply? > > Best regards, > Tomasz
Gentle ping. Are we picking this series for 4.18?
Regards Vivek
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