linux-kernel - Re: [PATCH 2/2] dt-bindings: display: imx: entry for LAUSCR

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]

Message-ID: <20170304085235.GA25286@botnar.kaiser.cx>
Date:   Sat, 4 Mar 2017 09:52:35 +0100
From:   Martin Kaiser <martin@...ser.cx>
To:     Rob Herring <robh@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     linux-fbdev@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: display: imx: entry for LAUSCR

Hi,

Thus wrote Rob Herring (robh@...nel.org):

> On Mon, Feb 27, 2017 at 11:56:42AM +0100, Martin Kaiser wrote:

> >  	- fsl,pcr: LCDC PCR value
> > +	A display node may optionally define
> > +	- fsl,lauscr: LCDC AUS Mode Control Register value (only for imx21)

> Looks like we already got one, but generally we don't just put magic 
> register values in the DT. What does this register control?

it contains settings related to AUS mode. This mode sets different
mappings between framebuffer memory and display pixels. It seems that
these mappings were originally defined for displays from AUO.

The only bit from this register that I really need is "AUS mode on/off".
I could put this into the device tree instead of the entire register.

Best regards,
Martin