linux-kernel - Re: [PATCH 6/7] thunderbolt: Add support for runtime PM

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Message-ID: <20180725081701.GA16930@kroah.com>
Date:   Wed, 25 Jul 2018 10:17:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] thunderbolt: Add support for runtime PM

On Wed, Jul 25, 2018 at 11:03:20AM +0300, Mika Westerberg wrote:
> When Thunderbolt host controller is set to RTD3 mode (Runtime D3) it is
> present all the time. Because of this it is important to runtime suspend
> the controller whenever possible. In case of ICM we have following rules
> which all needs to be true before the host controller can be put to D3:
> 
>   - The controller firmware reports to support RTD3
>   - All the connected devices announce support for RTD3
>   - There is no active XDomain connection
> 
> Implement this using standard Linux runtime PM APIs so that when all the
> children devices are runtime suspended, the Thunderbolt host controller
> PCI device is runtime suspended as well. The ICM firmware then starts
> powering down power domains towards RTD3 but it can prevent this if it
> detects that there is an active Display Port stream (this is not visible
> to the software, though).
> 
> The Thunderbolt host controller will be runtime resumed either when
> there is a remote wake event (device is connected or disconnected), or
> when there is access from userspace that requires hardware access.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
>  drivers/thunderbolt/domain.c  |  42 +++++++++++-
>  drivers/thunderbolt/icm.c     | 119 ++++++++++++++++++++++++++++++----
>  drivers/thunderbolt/nhi.c     |  38 ++++++++++-
>  drivers/thunderbolt/switch.c  |  65 +++++++++++++++++--
>  drivers/thunderbolt/tb.h      |  10 +++
>  drivers/thunderbolt/tb_msgs.h |   4 ++
>  drivers/thunderbolt/xdomain.c |  18 +++++
>  7 files changed, 276 insertions(+), 20 deletions(-)


This patch did not apply to my tree at all, what branch did you make it
against?

I've applied the others here, thanks.

greg k-h