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

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Message-ID: <9efde4d8-385d-54da-fb0d-55625d3c4571@ideasonboard.com>
Date:   Wed, 13 Sep 2023 15:58:11 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Andreas Kemnade <andreas@...nade.info>, 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, linux-omap@...r.kernel.org,
        Sebastian Reichel <sre@...nel.org>
Subject: Re: [RFC PATCH] drm: omapdrm: dsi: add refsel also for omap4

On 13/09/2023 15:48, Tony Lindgren wrote:
> * Tomi Valkeinen <tomi.valkeinen@...asonboard.com> [230913 12:11]:
>> 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.
> 
> I think those were both dsi command mode panels though, not video mode?

Yes, true. If the PLL is totally wrong due to refsel, I'm sure a command 
mode panel would also fail. But it's true that video mode panels are 
more sensitive to the clock rate.

  Tomi