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SubjectRe: [PATCH v12 0/4] Allow USB devices to remain runtime-suspended when sleeping
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On Thursday, January 07, 2016 04:46:11 PM Tomeu Vizoso wrote:
> Hi,
>
> this is v12 of an attempt to make it easier for devices to remain in
> runtime PM when the system goes to sleep, mainly to reduce the time
> spent resuming devices.
>
> For this, we interpret the absence of all PM callback implementations as
> it being safe to do direct_complete, so their ancestors aren't prevented
> from remaining runtime-suspended.
>
> Additionally, the prepare() callback of USB devices will return 1 if
> runtime PM is enabled and the current wakeup settings are correct.
>
> With these changes, a uvcvideo device (for example) stays in runtime
> suspend when the system goes to sleep and is left in that state when the
> system resumes, not delaying it unnecessarily.
>
> Thanks,
>
> Tomeu
>
> Changes in v12:
> - Include linux/pm_domain.h in vga_switcheroo.c for dev_pm_domain_set()
>
> Changes in v11:
> - Move calls to dev_pm_domain_set() out from &dev->power.lock as that
> isn't needed for dev->pm_domain.
>
> Changes in v10:
> - Remove superfluous call to pm_runtime_enabled() as suggested by Alan
>
> Changes in v9:
> - Add docs noting the need for the device lock to be held before calling
> device_is_bound()
> - Add docs noting the need for the device lock to be held before calling
> dev_pm_domain_set()
> - Move to CONFIG_PM_SLEEP as suggested by Rafael and Ulf.
> - Rename from device_check_pm_callbacks to device_pm_check_callbacks to
> follow with the naming convention of existing API.
> - Re-add calling to device_pm_check_callbacks from device registration
> and when updating the PM domain of a device.
>
> Changes in v8:
> - Add device_is_bound()
> - Add dev_pm_domain_set() and update code to use it
> - Move no_pm_callbacks field into CONFIG_PM_SLEEP
> - Call device_check_pm_callbacks only after a device is bound or unbound
>
> Changes in v7:
> - Reduce indentation by adding a label in device_prepare()
>
> Changes in v6:
> - Add stub for !CONFIG_PM.
> - Move implementation of device_check_pm_callbacks to power/main.c as it
> doesn't belong to CONFIG_PM_SLEEP.
> - Take dev->power.lock before modifying flag.
>
> Changes in v5:
> - Check for all dev_pm_ops instances associated to a device, updating a
> no_pm_callbacks flag at the times when that could change.
>
> Tomeu Vizoso (4):
> device core: add device_is_bound()
> PM / Domains: add setter for dev.pm_domain
> PM / sleep: Go direct_complete if driver has no callbacks
> USB / PM: Allow USB devices to remain runtime-suspended when sleeping
>
> arch/arm/mach-omap2/omap_device.c | 7 ++++---
> drivers/acpi/acpi_lpss.c | 5 ++++-
> drivers/acpi/device_pm.c | 5 +++--
> drivers/base/dd.c | 21 +++++++++++++++++++--
> drivers/base/power/clock_ops.c | 5 +++--
> drivers/base/power/common.c | 24 ++++++++++++++++++++++++
> drivers/base/power/domain.c | 8 ++++++--
> drivers/base/power/main.c | 35 +++++++++++++++++++++++++++++++++++
> drivers/base/power/power.h | 3 +++
> drivers/gpu/vga/vga_switcheroo.c | 11 ++++++-----
> drivers/misc/mei/pci-me.c | 5 +++--
> drivers/misc/mei/pci-txe.c | 5 +++--
> drivers/usb/core/port.c | 6 ++++++
> drivers/usb/core/usb.c | 8 +++++++-
> include/linux/device.h | 2 ++
> include/linux/pm.h | 1 +
> include/linux/pm_domain.h | 3 +++
> 17 files changed, 132 insertions(+), 22 deletions(-)

Series applied, thanks!


--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

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