linux-kernel - Re: [PATCH 00/23] Nokia N950 display support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 8 Mar 2016 21:45:11 +0100
From:	Sebastian Reichel <sre@...nel.org>
To:	Aaro Koskinen <aaro.koskinen@....fi>
Cc:	Tony Lindgren <tony@...mide.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	David Airlie <airlied@...ux.ie>, linux-omap@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/23] Nokia N950 display support

Hi,

On Tue, Mar 08, 2016 at 08:39:08PM +0200, Aaro Koskinen wrote:
> On Tue, Mar 08, 2016 at 05:39:32PM +0100, Sebastian Reichel wrote:
> > This series adds support for the Nokia N950 display.
> > Since the panel is using DSI command mode, it involves
> > adding support for manually updated displays to
> > omapdrm.
> 
> Works OK, but the picture seems to be upside down?

vertical, upside down is the native panel orientation.

> Also shouldn't the default orientation be landscape?

The N950 vendor kernel contains some code adding DSI
rotation support with half-frame update mechnism to
avoid tearing. It's quite complex and as far as I
understand it also error-prone. Tomi knows more about
that.

I have a simpler patch without the half-frame update
stuff, which works fine for me. I didn't notice any
tearing, but I haven't done any really fast image
updating. Also omapdrm has rotation support using
the DSS hardware, which also seems to work ok. I'm
still checking out what method is most suitable for
mainline.

But yeah, we probably want to change the default
rotation. Especially since touchscreen should have
the same default rotation as the screen. (TS is
horizontal, correct orientation for keyboard usage)

I will have a look at the (default-)rotation when
basic panel support has been ACKed.

-- Sebastian

Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)