hyperv: avoid dependency on screen_info

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The two hyperv framebuffer drivers (hyperv_fb or hyperv_drm_drv) access the
global screen_info in order to take over from the sysfb framebuffer, which
in turn could be handled by simplefb, simpledrm or efifb. Similarly, the
vmbus_drv code marks the original EFI framebuffer as reserved, but this
is not required if there is no sysfb.

As a preparation for making screen_info itself more local to the sysfb
helper code, add a compile-time conditional in all three files that relate
to hyperv fb and just skip this code if there is no sysfb that needs to
be unregistered.

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20231009211845.3136536-9-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Arnd Bergmann 2023-10-09 23:18:44 +02:00 • committed by Greg Kroah-Hartman

parent b858a97bf0

commit a07b50d80a

3 changed files with 12 additions and 9 deletions

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7

drivers/gpu/drm/hyperv/hyperv_drm_drv.c

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6

drivers/hv/vmbus_drv.c

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8

drivers/video/fbdev/hyperv_fb.c

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