linux-kernel - Re: [RFC PATCH v2 03/13] bootsplash: Flush framebuffer after drawing

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Date:   Wed, 3 Jan 2018 19:04:43 +0100
From:   Max Staudt <mstaudt@...e.de>
To:     Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Oliver Neukum <oneukum@...e.com>
Cc:     Daniel Vetter <daniel@...ll.ch>, bernhard.rosenkranzer@...aro.org,
        dri-devel@...ts.freedesktop.org, philm@...jaro.org,
        michal@...kovi.net, b.zolnierkie@...sung.com,
        Stefan Dirsch <sndirsch@...e.com>,
        Takashi Iwai <tiwai@...e.com>, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 03/13] bootsplash: Flush framebuffer after drawing

On 12/31/2017 01:53 PM, Alan Cox wrote:
> On Tue, 19 Dec 2017 15:07:53 +0100
> Oliver Neukum <oneukum@...e.com> wrote:
> 
>> Am Dienstag, den 19.12.2017, 14:57 +0100 schrieb Daniel Vetter:
>>>> Would you like me to extend the FB API or not?  
>>>
>>> Yes. Well for real I'd like you to do kms, so maybe you need to explain
>>> why exactly you absolutely have to use fbdev (aka which driver isn't
>>> supported by drm that you want to enable this on).  
>>
>> Hi,
>>
>> those would be at a minimum efifb, vesafb, xenfb
>> Those are obviously not sexy, but from a practical point of view
>> they are the minimum you need to support.
> 
> I think it's more constructive to look at it the other way around. What
> drivers do we have that actually need to be used which don't have DRM
> equivalents - and how do we fix that instead ?
It's *at least* the above named drivers: efifb, vesafb, xenfb.


Max