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armsr: enable framebuffer emulation for virtio-gpu/drm displays

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This was discovered when trying to run OpenWrt on Hetzner Cloud's
Arm-based instances.

Hetzner uses QEMU/KVM with virtio-gpu as the main display device,
together with an ACPI firmware. This was not displaying a console
previously.

This setup can be emulated by qemu using options below:
qemu-system-aarch64 \
    -machine virt \
    -bios QEMU_EFI.fd \
    -device virtio-gpu \
    -usb \
    -device qemu-xhci,id=xhci \
    -device usb-tablet,bus=xhci.0 \
    -device usb-kbd,bus=xhci.0 \
    -vnc :0

Signed-off-by: Mathew McBride <matt@traverse.com.au>
(cherry picked from commit ea7383e721)
Link: https://github.com/openwrt/openwrt/pull/15808
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Mathew McBride 2024-05-26 14:12:58 +10:00 committed by Hauke Mehrtens
parent 299893c9c9
commit 7a4f468d07
1 changed files with 3 additions and 0 deletions
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3
target/linux/armsr/config-5.15
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@ -99,6 +99,9 @@ CONFIG_DMA_REMAP=y
CONFIG_DMI=y
CONFIG_DMIID=y
CONFIG_DMI_SYSFS=y
CONFIG_DRM_FBDEV_EMULATION=y
CONFIG_DRM_FBDEV_OVERALLOC=100
CONFIG_DRM_LOAD_EDID_FIRMWARE=y
CONFIG_DTC=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EFI=y