linux-kernel - Re: [PATCH v11 0/2] drm: bridge: Add NWL MIPI DSI host controller support

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Message-ID: <20200410104835.GA22010@bogon.m.sigxcpu.org>
Date:   Fri, 10 Apr 2020 12:48:35 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....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>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Lee Jones <lee.jones@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Robert Chiras <robert.chiras@....com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v11 0/2] drm: bridge: Add NWL MIPI DSI host controller
 support

Hi,
On Thu, Apr 09, 2020 at 04:01:30PM +0200, Sam Ravnborg wrote:
> Hi Guido.
> 
> On Thu, Apr 09, 2020 at 12:42:00PM +0200, Guido Günther wrote:
> > This adds initial support for the NWL MIPI DSI Host controller found on i.MX8
> > SoCs.
> > 
> > It adds support for the i.MX8MQ but the same IP core can also be found on e.g.
> > i.MX8QXP. I added the necessary hooks to support other imx8 variants but since
> > I only have imx8mq boards to test I omitted the platform data for other SoCs.
> > 
> > The code is based on NXPs BSP so I added Robert Chiras as Co-authored-by.
> > 
> > The most notable changes over the BSP driver are
> >  - Calculate HS mode timing from phy_configure_opts_mipi_dphy
> >  - Perform all clock setup via DT
> >  - Merge nwl-imx and nwl drivers
> >  - Add B0 silion revision quirk
> >  - become a bridge driver to hook into mxsfb / dcss
> >    imx-display-subsystem so it makes sense to make it drive a bridge for dsi as
> >    well).
> >  - Use panel_bridge to attach the panel
> >  - Use multiplex framework instead of accessing syscon directly
> > 
> > This has been tested on a Librem 5 devkit using mxsfb with Robert's patches[1]
> > and the mainline rocktech-jh057n00900 DSI panel driver on next-20200317 and on
> > the Librem5 with the a Mantix MLAF057WE51-X DSI panel driver (not yet mainline)
> > The DCSS (submitted for mainline inclusion now too) can also act as input
> > source.
> 
> Thanks for your persistence with this driver.
> I got ack from Laurent on IRC to apply it (not for the driver as he had
> no time to review it).
> So applied to drm-misc-next now.
> 
> I look forward for the update to support DRM_BRIDGE_ATTACH_NO_CONNECTOR
> in this driver and the corresponding display driver.

Thanks. I'll have a look at that (currently checking where the larger
mxsfb rework of Laurent is going so i can use that as a base
eventually).
Cheers,
 -- Guido