[SRU] [Bionic/Unstable] [PATCH 0/7] Support Power Management for Thunderbolt Controller
hui.wang at canonical.com
Tue Aug 28 08:25:38 UTC 2018
Looks like the patch [7/7] is the key one to implement this feature.
what is the relation between [1/7~6/7] and [7/7], could we drop [1/7~6/7]?
On 2018年08月28日 14:43, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1789358
> New TBT controllers may use Native PCIe Enumeration (i.e. just like
> other normal PCIe device listed under lspci) instead of ACPI hotplug.
> Since TBT controller stops getting unplugged from PCIe bus, it draws
> additional power.
> Support runtime power management for TBT controllers, so it can be put
> to D3 to save powers.
> I tested and verified this patch series can make Lenovo T480's TBT
> controller enters PCI D3 at runtime.
> [Regression Potential]
> Low. Almost all TBT controllers in the wild still uses ACPI hotplug,
> this series won't affect those users.
> Mika Westerberg (7):
> thunderbolt: Handle NULL boot ACL entries properly
> thunderbolt: Notify userspace when boot_acl is changed
> thunderbolt: Use 64-bit DMA mask if supported by the platform
> thunderbolt: Do not unnecessarily call ICM get route
> thunderbolt: No need to take tb->lock in domain suspend/complete
> thunderbolt: Use correct ICM commands in system suspend
> thunderbolt: Add support for runtime PM
> drivers/thunderbolt/domain.c | 59 +++++++++---
> drivers/thunderbolt/icm.c | 174 ++++++++++++++++++++++++++++------
> drivers/thunderbolt/nhi.c | 46 ++++++++-
> drivers/thunderbolt/switch.c | 65 ++++++++++++-
> drivers/thunderbolt/tb.h | 10 ++
> drivers/thunderbolt/tb_msgs.h | 4 +
> drivers/thunderbolt/xdomain.c | 18 ++++
> 7 files changed, 328 insertions(+), 48 deletions(-)
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