Daniel Golle ce7bee88da armsr: replace fbdev with simpledrm ...

Legacy fbdev carries the boot framebuffer on armsr today, through efifb
and the PL111 driver, and armv8 guests on Hyper-V go through hyperv_fb.
A DRM driver can claim the firmware framebuffer on its own, so those
hardware drivers only add size to every image.

Mark the firmware framebuffer as a generic system framebuffer so sysfb
registers it as simple-framebuffer, and let simpledrm bind to it. sysfb
builds that device from the screen_info the EFI stub hands over, so
SystemReady hardware and EDK2 or U-Boot virtual platforms keep their
display. DRM fbdev emulation and fbcon stay, so the boot log and the
console prompt still reach the screen; the emulation serves fbcon, as
generic leaves FB_DEVICE off and no /dev/fb node appears.

armv8 gains hyperv_drm as its Hyper-V driver's help text asks, and loses
the backlight class and the videomode helpers, which a machine with no
panel has no use for. DRM_BOCHS, DRM_QXL and DRM_VIRTIO_GPU are
untouched.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

2026-10-06 18:35:40 +01:00

..

config-6.18

armsr: replace fbdev with simpledrm

2026-10-06 18:35:40 +01:00

target.mk

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