linux-kernel - Re: [PATCH 0/8] drm: fb-helper/ssd130x: Add support for DRM_FORMAT

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Date:   Mon, 17 Jul 2023 11:33:06 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/8] drm: fb-helper/ssd130x: Add support for DRM_FORMAT_R1

Geert Uytterhoeven <geert@...ux-m68k.org> writes:

> Hi Javier,

[...]

>> >> penguin in test004 is not displayed correctly. I was expecting that to be
>> >> working correctly since you mentioned to be using the Linux logo on boot.
>> >
>> > Linux has logos for displays using 2, 16, and 256 colors. Note that the
>> > default logos are 80x80, which is larger than your display, so no logo
>> > is drawn.
>> > Fbtest has only the full color logo, so it will look bad on a monochrome
>> > display.
>>
>> I see. Should the test check for minimum num_colors and skip that test then?
>
> The test still works (you did see an ugly black-and-white penguin), doesn't it?
>

Fair enough. But when it defaulted to XRGB8888, it looked better. So I
thought that it was a regression. No strong opinion though if the test
should be skipped or not.

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat