linux-kernel - Re: [PATCH resend v8 1/5] drm/bridge: nwl-dsi: Set PHY mode in nwl_dsi_mode

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Date:   Fri, 6 May 2022 10:53:39 +0200
From:   Guido Günther <guido.gunther@...i.sm>
To:     Liu Ying <victor.liu@....com>
Cc:     linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, kishon@...com,
        vkoul@...nel.org, robh@...nel.org, krzk@...nel.org,
        andrzej.hajda@...el.com, narmstrong@...libre.com,
        robert.foss@...aro.org, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, jernej.skrabec@...il.com, airlied@...ux.ie,
        daniel@...ll.ch, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        robert.chiras@....com, martin.kepplinger@...i.sm
Subject: Re: [PATCH resend v8 1/5] drm/bridge: nwl-dsi: Set PHY mode in
 nwl_dsi_mode_set()

Hi Liu,
On Fri, Apr 29, 2022 at 08:30:43PM +0800, Liu Ying wrote:
> Hi,
> 
> On Fri, 2022-04-22 at 19:24 +0200, Guido Günther wrote:
> > Hi,
> > On Tue, Apr 19, 2022 at 09:08:48AM +0800, Liu Ying wrote:
> > > The Northwest Logic MIPI DSI host controller embedded in i.MX8qxp
> > > works with a Mixel MIPI DPHY + LVDS PHY combo to support either
> > > a MIPI DSI display or a LVDS display.  So, this patch calls
> > > phy_set_mode() from nwl_dsi_mode_set() to set PHY mode to MIPI DPHY
> > > explicitly.
> > > 
> > > Cc: Guido Günther <agx@...xcpu.org>
> > > Cc: Robert Chiras <robert.chiras@....com>
> > > Cc: Martin Kepplinger <martin.kepplinger@...i.sm>
> > > Cc: Andrzej Hajda <andrzej.hajda@...el.com>
> > > Cc: Neil Armstrong <narmstrong@...libre.com>
> > > Cc: Laurent Pinchart <Laurent.pinchart@...asonboard.com>
> > > Cc: Jonas Karlman <jonas@...boo.se>
> > > Cc: Jernej Skrabec <jernej.skrabec@...il.com>
> > > Cc: David Airlie <airlied@...ux.ie>
> > > Cc: Daniel Vetter <daniel@...ll.ch>
> > > Cc: NXP Linux Team <linux-imx@....com>
> > > Signed-off-by: Liu Ying <victor.liu@....com>
> 
> Hope this patch won't fall through the cracks.
> Can someone please apply it to drm-misc-next? Robert?

Applied to drm-misc-next.
Cheers,
 -- Guido

> 
> Thanks,
> Liu Ying
> 
> > > ---
> > > v7->v8:
> > > * Resend with Andrzej's and Jernej's mail addressed updated.
> > > 
> > > v6->v7:
> > > * No change.
> > > 
> > > v5->v6:
> > > * Rebase the series upon v5.17-rc1.
> > > * Set PHY mode in ->mode_set() instead of ->pre_enable() in the
> > > nwl-dsi
> > >   bridge driver due to the rebase.
> > > * Drop Guido's R-b tag due to the rebase.
> > > 
> > > v4->v5:
> > > * No change.
> > > 
> > > v3->v4:
> > > * No change.
> > > 
> > > v2->v3:
> > > * No change.
> > > 
> > > v1->v2:
> > > * Add Guido's R-b tag.
> > > 
> > >  drivers/gpu/drm/bridge/nwl-dsi.c | 6 ++++++
> > >  1 file changed, 6 insertions(+)
> > > 
> > > diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c
> > > b/drivers/gpu/drm/bridge/nwl-dsi.c
> > > index d5945501a5ee..85bab7372af1 100644
> > > --- a/drivers/gpu/drm/bridge/nwl-dsi.c
> > > +++ b/drivers/gpu/drm/bridge/nwl-dsi.c
> > > @@ -666,6 +666,12 @@ static int nwl_dsi_mode_set(struct nwl_dsi
> > > *dsi)
> > >  		return ret;
> > >  	}
> > >  
> > > +	ret = phy_set_mode(dsi->phy, PHY_MODE_MIPI_DPHY);
> > > +	if (ret < 0) {
> > > +		DRM_DEV_ERROR(dev, "Failed to set DSI phy mode: %d\n",
> > > ret);
> > > +		goto uninit_phy;
> > > +	}
> > > +
> > >  	ret = phy_configure(dsi->phy, phy_cfg);
> > >  	if (ret < 0) {
> > >  		DRM_DEV_ERROR(dev, "Failed to configure DSI phy: %d\n",
> > > ret);
> > 
> > I can't currently test this but it still looks good so
> > 
> > Reviewed-by: Guido Günther <agx@...xcpu.org>
> > 
> > Cheers,
> >  -- Guido
> > 
> > > -- 
> > > 2.25.1
> > > 
>