linux-kernel - Re: [PATCH v2 2/3] arch: Remove struct fb

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Date: Thu, 28 Mar 2024 15:59:27 +0100
From: Helge Deller <deller@....de>
To: Thomas Zimmermann <tzimmermann@...e.de>, arnd@...db.de,
 javierm@...hat.com, sui.jingfeng@...ux.dev
Cc: linux-arch@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-fbdev@...r.kernel.org, sparclinux@...r.kernel.org,
 linux-sh@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
 linux-parisc@...r.kernel.org, linux-mips@...r.kernel.org,
 linux-m68k@...ts.linux-m68k.org, loongarch@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-snps-arc@...ts.infradead.org,
 linux-kernel@...r.kernel.org,
 "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
 "David S. Miller" <davem@...emloft.net>,
 Andreas Larsson <andreas@...sler.com>, 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>
Subject: Re: [PATCH v2 2/3] arch: Remove struct fb_info from video helpers

On 3/28/24 14:33, Thomas Zimmermann wrote:
> Am 28.03.24 um 12:04 schrieb Helge Deller:
>> On 3/27/24 21:41, Thomas Zimmermann wrote:
>>> The per-architecture video helpers do not depend on struct fb_info
>>> or anything else from fbdev. Remove it from the interface and replace
>>> fb_is_primary_device() with video_is_primary_device(). The new helper
>>
>> Since you rename this function, wouldn't something similar to
>>
>> device_is_primary_display()
>>     or
>> device_is_primary_console()
>>     or
>> is_primary_graphics_device()
>>     or
>> is_primary_display_device()
>>
>> be a better name?
>
> The video_ prefix is there to signal that the code is part of the video subsystem.
>
> But there's too much code that tried to figure out a default video
> device. So I actually have different plans for this function. I'd
> like to replace it with a helper that returns the default device
> instead of just testing for it. Sample code for x86 is already in
> vgaarb.c. [1] The function's name would then be
> video_default_device() and return the appropriate struct device*.
> video_is_primary device() will be removed. This rename here is the
> easiest step towards the new helper. Ok?
Sounds ok.

Helge