linux-kernel - Re: [PATCH 0/1] phy: fsl-imx8-mipi-dphy: Hook into runtime pm

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Message-ID: <20200626070718.GA5854@bogon.m.sigxcpu.org>
Date:   Fri, 26 Jun 2020 09:07:18 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Robert Chiras <robert.chiras@....com>,
        Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/1] phy: fsl-imx8-mipi-dphy: Hook into runtime pm

Hi,
On Tue, Feb 25, 2020 at 04:53:33PM +0100, Guido Günther wrote:
> This allows us to shut down the mipi power domain on the SOC.  The
> alternative would be to drop the dphy from the mipi power domain in the
> SOCs device tree and only have the DSI host controller visible there
> (and rely on the phy layer's built in runtime pm handling) but this
> makes the power domain dependency less explicit.
> 
> Currently the pm domain can't be shut off when blanking the panel:

Anything I can do to get this applied?
Cheers,
 -- Guido

> 
> pm_genpd_summary
> domain                          status          slaves
>     /device                                             runtime status
> ----------------------------------------------------------------------
> mipi                            on
>     /devices/platform/soc@...oc@0:bus@...00000/30a00300.dphy  unsupported
>     /devices/platform/soc@...oc@0:bus@...00000/30a00000.mipi_dsi  suspended
> 
> while with this we can shut down the power domain on panel blank:
> 
> mipi                            off-0
>     /devices/platform/soc@...oc@0:bus@...00000/30a00300.dphy  suspended
>     /devices/platform/soc@...oc@0:bus@...00000/30a00000.mipi_dsi  suspended
> 
> This is similar to what drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
> does.
> 
> Patch is against next-20200217
> 
> Guido Günther (1):
>   phy: fsl-imx8-mipi-dphy: Hook into runtime pm
> 
>  .../phy/freescale/phy-fsl-imx8-mipi-dphy.c    | 22 ++++++++++++++++++-
>  1 file changed, 21 insertions(+), 1 deletion(-)
> 
> -- 
> 2.23.0
> 
> 
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> linux-arm-kernel@...ts.infradead.org
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