linux-kernel - Re: [PATCH v3] simplefb: Enable boot time VESA graphic mode selection.

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Message-ID: <a9df1753-8e3b-55bb-2dab-9e7aeaa52a8d@redhat.com>
Date:   Wed, 23 Feb 2022 19:13:07 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Michal Suchánek <msuchanek@...e.de>
Cc:     dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, Martin Mares <mj@....cz>,
        Helge Deller <deller@....de>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sudeep Holla <sudeep.holla@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Cristian Marussi <cristian.marussi@....com>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Arnd Bergmann <arnd@...db.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rob Herring <robh@...nel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        David Herrmann <dh.herrmann@...il.com>,
        linux-kernel@...r.kernel.org, linux-video@...ey.karlin.mff.cuni.cz
Subject: Re: [PATCH v3] simplefb: Enable boot time VESA graphic mode
 selection.

On 2/23/22 18:12, Michal Suchánek wrote:
> On Wed, Feb 23, 2022 at 05:54:54PM +0100, Javier Martinez Canillas wrote:

[snip]

>>
>> Yes, that's what I tried to say. But your commit message says "To enable
>> use of VESA modes with simplefb in legacy BIOS boot mode" and that isn't
>> accurate AFAIU (unless you meant sysfb instead).
> 
>  config SYSFB_SIMPLEFB
>         bool "Mark VGA/VBE/EFI FB as generic system framebuffer"
>         depends on SYSFB
> +       select BOOT_VESA_SUPPORT if X86
> 
> This to me means that it's simplefb specifically that requires it, not sysfb.
> More precisely SYSFB_SIMPLEFB which is the simplefb implementation on top of
> legacy BIOS.
> 

Ok, I see what you meant. The fact that simplefb is what's named to the part
of the sysfb driver that register the "simple-framebuffer" platform device
and also the name of the fbdev driver that matches the "simple-framebuffer"
is too confusing.

My point about the subject line remains thought, I would use something like:

firmware: sysfb: Enable boot time VESA graphic mode selection for simplefb

But I'll stop bike-shedding this. I don't mind if you keep the current line
and feel free to keep my r-b tag.

Best regards,
-- 
Javier Martinez Canillas
Linux Engineering
Red Hat