linux-kernel - Re: [RFC PATCH] drm: omapdrm: dsi: add refsel also for omap4

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Message-ID: <20230913185202.6e6c5341@akphone>
Date:   Wed, 13 Sep 2023 18:52:02 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc:     airlied@...il.com, daniel@...ll.ch, u.kleine-koenig@...gutronix.de,
        arnd@...db.de, laurent.pinchart@...asonboard.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
        Sebastian Reichel <sre@...nel.org>
Subject: Re: [RFC PATCH] drm: omapdrm: dsi: add refsel also for omap4

On Wed, 13 Sep 2023 15:11:08 +0300
Tomi Valkeinen <tomi.valkeinen@...asonboard.com> wrote:

> On 13/09/2023 09:59, Andreas Kemnade wrote:
> > Some 3.0 source has it set behind a if (omap4).
> > Maybe it is helpful maybe not, at least in the omap4460
> > trm these bits are marked as reserved.
> > But maybe some dsi video mode panel starts magically working.  
> 
> Sorry, what does this mean? That this fixes something, or you are
> just guessing?
> 
just diffing registers between good and bad. It does not fix anything,
just reducing the diff.

> I'm somewhat sure that the upstream driver used to work on omap4 sdp, 
> which has two DSI panels. But I can't even remember what omap4
> version it had.
> 
after we are using displays from gpu/drm/displays?

Regards
Andreas