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Subject: Re: [v3] drm/bridge: ti-sn65dsi86: ensure bridge suspend happens
 during PM sleep
To:     Doug Anderson <dianders@chromium.org>,
        Harigovindan P <harigovi@codeaurora.org>,
        Andrzej Hajda <a.hajda@samsung.com>
Cc:     dri-devel <dri-devel@lists.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@vger.kernel.org>,
        freedreno <freedreno@lists.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Rob Clark <robdclark@gmail.com>,
        Sean Paul <seanpaul@chromium.org>,
        "Kristian H. Kristensen" <hoegsberg@chromium.org>,
        Kalyan Thota <kalyan_t@codeaurora.org>, nganji@codeaurora.org,
        Sam Ravnborg <sam@ravnborg.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@siol.net>
References: <20200609120455.20458-1-harigovi@codeaurora.org>
 <CAD=FV=XHHAAWNkJGMJESf4C=hcbaswFamGVeyMJ9eRd6dWAy8Q@mail.gmail.com>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Organization: Baylibre
Message-ID: <0d408a69-b5ef-d082-aaef-e6d0a9541d08@baylibre.com>
Date:   Fri, 26 Jun 2020 13:55:17 +0200
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Sender: linux-kernel-owner@vger.kernel.org
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Hi,

On 19/06/2020 00:09, Doug Anderson wrote:
> Hi,
> 
> On Tue, Jun 9, 2020 at 5:05 AM Harigovindan P <harigovi@codeaurora.org> wrote:
>>
>> ti-sn65dsi86 bridge is enumerated as a runtime device. When
>> suspend is triggered, PM core adds a refcount on all the
>> devices and calls device suspend, since usage count is
>> already incremented, runtime suspend will not be called
>> and it kept the bridge regulators and gpios ON which resulted
>> in platform not entering into XO shutdown.
>>
>> Add changes to force suspend on the runtime device during pm sleep.
>>
>> Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
>> ---
>>
>> Changes in v2:
>>         - Include bridge name in the commit message and
>>         remove dependent patchwork link from the commit
>>         text as bridge is independent of OEM(Stephen Boyd)
>>
>> Changes in v3:
>>         - Updating changelog to explain the need for patch
>>
>>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 2 ++
>>  1 file changed, 2 insertions(+)
> 
> I think this patch is good to go now (has both Stephen's and my
> reviews).  I noticed that Neil landed my other patches to this driver
> recently (thanks!) and wondered why he didn't land this one.  Then, I
> realized that you didn't send it to him or the other bridge
> maintainer.  :(  Have you tried running get_maintainer?
> 
> $ ./scripts/get_maintainer.pl -f drivers/gpu/drm/bridge/ti-sn65dsi86.c
> Andrzej Hajda <a.hajda@samsung.com> (maintainer:DRM DRIVERS FOR BRIDGE CHIPS)
> Neil Armstrong <narmstrong@baylibre.com> (maintainer:DRM DRIVERS FOR
> BRIDGE CHIPS)
> Laurent Pinchart <Laurent.pinchart@ideasonboard.com> (reviewer:DRM
> DRIVERS FOR BRIDGE CHIPS)
> Jonas Karlman <jonas@kwiboo.se> (reviewer:DRM DRIVERS FOR BRIDGE CHIPS)
> Jernej Skrabec <jernej.skrabec@siol.net> (reviewer:DRM DRIVERS FOR BRIDGE CHIPS)
> David Airlie <airlied@linux.ie> (maintainer:DRM DRIVERS)
> Daniel Vetter <daniel@ffwll.ch> (maintainer:DRM DRIVERS)
> dri-devel@lists.freedesktop.org (open list:DRM DRIVERS)
> linux-kernel@vger.kernel.org (open list)
> 
> In any case, unless someone has extra feedback on this patch I think
> it's ready to land.
> 
> Neil: If you're willing to land this patch too, can you let
> Harigovindan know if it needs to be re-sent with you in the "To:" list
> or if you can find it on the dri-devel list?

Sorry missed this one,

Applying to drm-misc-next

Neil

> 
> Thanks!
> 
> -Doug
>