Re: [PATCH v3 0/2] allow simple{fb, drm} drivers to be used on non-x86 EFI platforms

From: Thomas Zimmermann <tzimmermann@suse.de>
To: Javier Martinez Canillas <javierm@redhat.com>,
	linux-kernel@vger.kernel.org
Cc: linux-efi@vger.kernel.org, David Airlie <airlied@linux.ie>,
	Catalin Marinas <catalin.marinas@arm.com>,
	dri-devel@lists.freedesktop.org,
	Atish Patra <atish.patra@wdc.com>,
	linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
	Ard Biesheuvel <ardb@kernel.org>,
	x86@kernel.org, Russell King <linux@armlinux.org.uk>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Robinson <pbrobinson@gmail.com>,
	Borislav Petkov <bp@suse.de>, Albert Ou <aou@eecs.berkeley.edu>,
	Hans de Goede <hdegoede@redhat.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-arm-kernel@lists.infradead.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Palmer Dabbelt <palmer@dabbelt.com>
Subject: Re: [PATCH v3 0/2] allow simple{fb, drm} drivers to be used on non-x86 EFI platforms
Date: Thu, 15 Jul 2021 10:11:50 +0200	[thread overview]
Message-ID: <8dd26141-a09c-39e2-5174-4cad8d21c49c@suse.de> (raw)
In-Reply-To: <e61cf77c-6bff-dfcc-d3df-2fb6b48e5897@redhat.com>

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Hi

Am 13.07.21 um 18:59 schrieb Javier Martinez Canillas:
> On 6/25/21 3:09 PM, Javier Martinez Canillas wrote:
>> The simplefb and simpledrm drivers match against a "simple-framebuffer"
>> device, but for aarch64 this is only registered when using Device Trees
>> and there's a node with a "simple-framebuffer" compatible string.
>>
>> There is no code to register a "simple-framebuffer" platform device when
>> using EFI instead. In fact, the only platform device that's registered in
>> this case is an "efi-framebuffer", which means that the efifb driver is
>> the only driver supported to have an early console with EFI on aarch64.
>>
>> The x86 architecture platform has a Generic System Framebuffers (sysfb)
>> support, that register a system frambuffer platform device. It either
>> registers a "simple-framebuffer" for the simple{fb,drm} drivers or legacy
>> VGA/EFI FB devices for the vgafb/efifb drivers.
>>
>> The sysfb is generic enough to be reused by other architectures and can be
>> moved out of the arch/x86 directory to drivers/firmware, allowing the EFI
>> logic used by non-x86 architectures to be folded into sysfb as well.
>>
> 
> Any more comments on this series? It would be nice for this to land so the
> simpledrm driver could be used on aarch64 EFI systems as well.
> 
> The patches have already been acked by x86 and DRM folks.

Time to get this merged, I'd say. People are asking for these patches 
already.

Best regards
Thomas

> 
> Best regards,
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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