linux-kernel - Re: [PATCH v3 0/1] phy: fsl-imx8-mipi-dphy: Hook into runtime pm

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Message-ID: <9e4ac0b88190312c19709b6253aad7eca203580c.camel@nxp.com>
Date:   Sat, 20 Feb 2021 13:29:46 +0800
From:   Liu Ying <victor.liu@....com>
To:     Guido Günther <agx@...xcpu.org>,
        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 v3 0/1] phy: fsl-imx8-mipi-dphy: Hook into runtime pm

Hi Guido,

On Fri, 2021-02-19 at 10:38 +0100, Guido Günther wrote:
> Hi,
> On Wed, Dec 16, 2020 at 07:22:32PM +0100, Guido Günther wrote:
> > This allows us to shut down the mipi power domain on the imx8. 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 but since the PD is mostly
> > about the PHY that would defeat it's purpose.
> 
> Is there anything I can do to move that forward. I assume this needs to
> go via the phy/ subsystem not drm?

I cannot find patch 1/1 of v3 in my mailbox, so I'll provide comment on
v2.

Regards,
Liu Ying

> Cheers,
>  -- Guido
> 
> > This is basically a resend from February 2020 which went without feedback.
> > 
> > This allows to shut off the power domain hen blanking the LCD panel:
> > 
> > pm_genpd_summary before:
> > 
> > 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
> > 
> > after:
> > 
> > mipi                            off-0
> >     /devices/platform/soc@...oc@0:bus@...00000/30a00300.dphy  suspended
> >     /devices/platform/soc@...oc@0:bus@...00000/30a00000.mipi_dsi  suspended
> > 
> > Changes from v1:
> >  - Tweak commit message slightly
> > 
> > Changes from v2:
> >   - As pre review comment by Lucas Stach
> >     https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Flinux-arm-kernel%2Fee22b072e0abe07559a3e6a63ccf6ece064a46cb.camel%40pengutronix.de%2F&amp;data=04%7C01%7Cvictor.liu%40nxp.com%7Ccac0b14c892c4a35340508d8d4ba2e16%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637493243396909710%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=PU5kegolJwKK%2BQ7nD7V9qjrKJ2fJ9eKoySoFihnFoD8%3D&amp;reserved=0
> >     Check for pm_runtime_get_sync failure
> > 
> > Guido Günther (1):
> >   phy: fsl-imx8-mipi-dphy: Hook into runtime pm
> > 
> >  .../phy/freescale/phy-fsl-imx8-mipi-dphy.c    | 25 ++++++++++++++++++-
> >  1 file changed, 24 insertions(+), 1 deletion(-)
> > 
> > -- 
> > 2.29.2
> > 
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@...ts.infradead.org
> > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.infradead.org%2Fmailman%2Flistinfo%2Flinux-arm-kernel&amp;data=04%7C01%7Cvictor.liu%40nxp.com%7Ccac0b14c892c4a35340508d8d4ba2e16%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637493243396909710%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=kkC3Go0wvHemjxaKVHwU%2F6gWRsgVOFoVz7QEHB7Zqx0%3D&amp;reserved=0