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SubjectRe: [PATCH] fbdev: fbmem: convert CONFIG_FB_LOGO_CENTER into a cmd line, option
Date
On 2019-01-07 09:40, Geert Uytterhoeven wrote:
> Hi Peter,
>
> On Mon, Jan 7, 2019 at 9:26 AM Peter Rosin <peda@axentia.se> wrote:
>> On 2019-01-06 10:33, Geert Uytterhoeven wrote:
>>> On Mon, Nov 26, 2018 at 10:59 PM Peter Rosin <peda@axentia.se> wrote:
>>>> If there are extra logos (CONFIG_FB_LOGO_EXTRA) the heights of these
>>>> extra logos are not considered when centering the first logo vertically.
>>>>
>>>> Signed-off-by: Peter Rosin <peda@axentia.se>
>>>
>>>> --- a/drivers/video/logo/Kconfig
>>>> +++ b/drivers/video/logo/Kconfig
>>>> @@ -10,6 +10,15 @@ menuconfig LOGO
>>>>
>>>> if LOGO
>>>>
>>>> +config FB_LOGO_CENTER
>>>> + bool "Center the logo"
>>>> + depends on FB=y
>>>> + help
>>>> + When this option is selected, the bootup logo is centered both
>>>> + horizontally and vertically. If more than one logo is displayed
>>>> + due to multiple CPUs, the collected line of logos is centered
>>>> + as a whole.
>>>> +
>>>
>>> Isn't a kernel command line option more suitable to configure the position
>>> of the logo?
>>
>> That didn't occur to me previously, but it does make sense now that you
>> mention it. This is on top of v5.0-rc1, and if applied before v5.0 we
>> can avoid possible regressions for folks who might start to rely on
>> CONFIG_FB_LOGO_CENTER if v5.0 is released w/o this.
>>
>> Cheers,
>> Peter
>>
>> From de7353ab519ba9b5c9ea3f62d607bb8e94b687cc Mon Sep 17 00:00:00 2001
>> From: Peter Rosin <peda@axentia.se>
>> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
>> Cc: Jonathan Corbet <corbet@lwn.net>
>> Cc: Peter Rosin <peda@axentia.se>
>> Cc: dri-devel@lists.freedesktop.org
>> Cc: linux-fbdev@vger.kernel.org
>> Cc: linux-doc@vger.kernel.org
>> To: linux-kernel@vger.kernel.org
>> Date: Mon, 7 Jan 2019 08:35:26 +0100
>> Subject: [PATCH] fbdev: fbmem: convert CONFIG_FB_LOGO_CENTER into a cmd line
>> option
>>
>> A command line option is much more flexible than a config option and
>> the supporting code is small. Gets rid of #ifdefs in the code too...
>>
>> Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
>> Signed-off-by: Peter Rosin <peda@axentia.se>
>
> Thanks for your patch!
>
>> --- a/Documentation/fb/fbcon.txt
>> +++ b/Documentation/fb/fbcon.txt
>> @@ -163,6 +163,12 @@ C. Boot options
>> be preserved until there actually is some text is output to the console.
>> This option causes fbcon to bind immediately to the fbdev device.
>>
>> +7. fbcon=center-logo
>> +
>> + When this option is selected, the bootup logo is centered both
>> + horizontally and vertically. If more than one logo is displayed due to
>> + multiple CPUs, the collected line of logos is centered as a whole.
>> +
>
> What about making this more generic, than an option specific for centering?
> Else people want fbcon=left-logo or fbcon=right-logo soon?
>
> fbcon=logo-pos:<pos>
>
> With <pos> being "center", "left", "top", "right", "bottom", and combinations
> like "top,center"? Or is that complicating stuff too much?

I'm not too keen on implementing all that when I have zero use for it. I can
however rename the trigger for the existing fb_center_logo bool to

fbcon=logo-pos:center

and add a check for "top,left" to reset the bool to false. Then the other
variants can be added later by whomever and when needed.

Is that good enough?

Cheers,
Peter
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