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

From: Thomas Zimmermann
Date: Thu Jul 15 2021 - 04:11:55 EST


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

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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