linux-kernel - Re: [EXT] Re: [PATCH v2 2/2] drm/panel: Add support for Raydium RM67191 panel driver

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Message-ID: <1561019665.9328.70.camel@nxp.com>
Date:   Thu, 20 Jun 2019 08:34:25 +0000
From:   Robert Chiras <robert.chiras@....com>
To:     "festevam@...il.com" <festevam@...il.com>
CC:     dl-linux-imx <linux-imx@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "sam@...nborg.org" <sam@...nborg.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>
Subject: Re: [EXT] Re: [PATCH v2 2/2] drm/panel: Add support for Raydium
 RM67191 panel driver

On Mi, 2019-06-19 at 10:28 -0300, Fabio Estevam wrote:
> Caution: EXT Email
> 
> Hi Robert,
> 
> On Tue, Jun 18, 2019 at 10:31 AM Robert Chiras <robert.chiras@....com
> > wrote:
> 
> > 
> > +static const struct display_timing rad_default_timing = {
> > +       .pixelclock = { 66000000, 132000000, 132000000 },
> > +       .hactive = { 1080, 1080, 1080 },
> > +       .hfront_porch = { 20, 20, 20 },
> > +       .hsync_len = { 2, 2, 2 },
> > +       .hback_porch = { 34, 34, 34 },
> > +       .vactive = { 1920, 1920, 1920 },
> > +       .vfront_porch = { 10, 10, 10 },
> > +       .vsync_len = { 2, 2, 2 },
> > +       .vback_porch = { 4, 4, 4 },
> Are you sure that the sync_len and porch parameters are the same for
> both 66MHz and 132MHz?
Probably they are not, since I didn't get this panel to work well with
66Hz. So I will just keep 132MHz, since these are the only timinings we
received from vendor.