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    SubjectRe: Fwd: [PATCH] Add driver to force WMI Thunderbolt controller power status
    On Wed, Sep 06, 2017 at 09:40:02PM +0000, Mario.Limonciello@dell.com wrote:
    > > -----Original Message-----
    > > From: Bernat, Yehezkel [mailto:yehezkel.bernat@intel.com]
    > > Sent: Wednesday, September 6, 2017 3:27 PM
    > > To: dvhart@infradead.org; Limonciello, Mario <Mario_Limonciello@Dell.com>
    > > Cc: mika.westerberg@linux.intel.com; linux-kernel@vger.kernel.org; platform-
    > > driver-x86@vger.kernel.org; hughsient@gmail.com
    > > Subject: Re: Fwd: [PATCH] Add driver to force WMI Thunderbolt controller power
    > > status
    > >
    > > On Wed, 2017-09-06 at 13:09 -0700, Darren Hart wrote:
    > > > The other question I had about this was if the typical use case
    > > > involves the OS,
    > > > or if the firmware update (for example) would be performed as part of
    > > > the
    > > > general platform firmware update (from the UEFI update utility).
    > >
    > > First, there is the use-case of add-in card, where it's impossible to
    > > use UEFI-based update, as much as I understand, as the BIOS isn't
    > > expected to expose an ESRT entry for it.
    > >
    > > Even for built-in controller, my impression is that most OEMs use a FW
    > > update application (running on Windows) and are not publishing a UEFI-
    > > based solution.
    >
    > Yeah I'd agree with that impression.
    >
    > Even if an OEM does choose to publish a UEFI based solution, it's still
    > useful to present FW information for the TBT controller in fwupd however too.
    >
    > Similar to how fwupd displays the information for the ME even though
    > the ME is typically updated via UEFI.

    So this raises the question: can we come up with a mechanism as part of the tb
    driver that will work on both on-board controllers and add on cards? In it's
    current form, this driver will only address on-board controllers.

    The TB driver could use the WMI method if it exists, or some other method to
    power it up, but present the same sysfs interface to userspace...

    --
    Darren Hart
    VMware Open Source Technology Center

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