From: Javier Martinez Canillas <javierm@redhat.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-kernel@vger.kernel.org,
"Sahaj Sarup" <sahaj.sarup@linaro.org>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Helge Deller" <deller@gmx.de>, "Sam Ravnborg" <sam@ravnborg.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org
Subject: Re: [PATCH 2/3] fbdev: ssd1307fb: Change "solomon,page-offset" property default value
Date: Fri, 17 Nov 2023 23:18:45 +0100 [thread overview]
Message-ID: <878r6w10sa.fsf@minerva.mail-host-address-is-not-set> (raw)
In-Reply-To: <ZVfX5Tw71cqKFJ83@smile.fi.intel.com>
Andy Shevchenko <andriy.shevchenko@linux.intel.com> writes:
Hello Andy,
> 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@linaro.org>
>
> Closes?
There's no report in a mailing list or bug tracker to reference.
> Fixes?
>
Since the default has been the same since the driver was merged,
it doesn't make that much sense for me to reference that commit.
--
Best regards,
Javier Martinez Canillas
Core Platforms
Red Hat
prev parent reply other threads:[~2023-11-17 22:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20231116180743.2763021-1-javierm@redhat.com>
2023-11-16 18:07 ` [PATCH 2/3] fbdev: ssd1307fb: Change "solomon,page-offset" property default value Javier Martinez Canillas
2023-11-17 21:15 ` Andy Shevchenko
2023-11-17 22:18 ` Javier Martinez Canillas [this message]
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