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

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Date:   Fri, 19 Feb 2021 10:38:53 +0100
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 v3 0/1] phy: fsl-imx8-mipi-dphy: Hook into runtime pm

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?
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://lore.kernel.org/linux-arm-kernel/ee22b072e0abe07559a3e6a63ccf6ece064a46cb.camel@pengutronix.de/
>     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
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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