linux-kernel - Re: [PATCH 2/3] fbdev: ssd1307fb: Change "solomon,page-offset" property default value

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: <ZVfX5Tw71cqKFJ83@smile.fi.intel.com>
Date:   Fri, 17 Nov 2023 23:15:17 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Sahaj Sarup <sahaj.sarup@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Helge Deller <deller@....de>, Sam Ravnborg <sam@...nborg.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org
Subject: Re: [PATCH 2/3] fbdev: ssd1307fb: Change "solomon,page-offset"
 property default value

On Thu, Nov 16, 2023 at 07:07:38PM +0100, Javier Martinez Canillas wrote:
> This is used to specify the page start address offset of the display RAM.
> 
> The value is used as offset when setting the page start address with the
> SSD130X_SET_PAGE_RANGE command, and the driver currently sets its value to
> 1 if the property is not present in the Device Tree.
> 
> But the datasheet mentions that the value on reset for the page start is a
> 0, so it makes more sense to also have 0 as the default value for the page
> offset if the property is not present.
> 
> In fact, using a default value of 1 leads to the display not working when
> the fbdev is attached to the framebuffer console.
> 
> Reported-by: Sahaj Sarup <sahaj.sarup@...aro.org>

Closes?
Fixes?

> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
With Best Regards,
Andy Shevchenko