Re: [PATCH 2/2] efi: earlycon: Add support for generic framebuffers and move to fbdev subsystem

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Hi Arnd,

On 7/28/22 17:48, Arnd Bergmann wrote:
On Thu, Jul 28, 2022 at 4:28 PM Markuss Broks <markuss.broks@xxxxxxxxx> wrote:

Add early console support for generic linear framebuffer devices.
This driver supports probing from cmdline early parameters
or from the device-tree using information in simple-framebuffer node.
The EFI functionality should be retained in whole.
The driver was disabled on ARM because of a bug in early_ioremap
implementation on ARM.

Signed-off-by: Markuss Broks <markuss.broks@xxxxxxxxx>
---
  .../admin-guide/kernel-parameters.txt         |  12 +-
  MAINTAINERS                                   |   5 +
  drivers/firmware/efi/Kconfig                  |   6 +-
  drivers/firmware/efi/Makefile                 |   1 -
  drivers/firmware/efi/earlycon.c               | 246 --------------
  drivers/video/fbdev/Kconfig                   |  11 +
  drivers/video/fbdev/Makefile                  |   1 +
  drivers/video/fbdev/earlycon.c                | 301 ++++++++++++++++++

It looks like this is not actually related to fbdev, and since drivers are
moving from fbdev/simplefb towards drm/simpledrm, maybe it would be
better to put this into either drivers/gpu/drm/tiny/ or possibly
drivers/video/console to let this be used without enabling fbdev?

Ideally this shouldn't depend on anything, because it isn't utilizing any of fbdev code and won't be utilizing any of drm/console code. I agree that either of those would be a better place for it, but which one do you think would suit more for this driver?


         Arnd

- Markuss



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