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Handle framebuffer_coreboot driver built as a module

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The driver for coreboot firmware-initialized framebuffer can be built as
a module. Debian kernels so far have it as built-in because they would
not be probed automatically when built as a module. This is fixed now,
likely with a patchset included in v6.9-rc1, so we might encounter it as
a module either in Debian or with custom-built kernels.

For MODULES=dep, check for the coreboot framebuffer in a different block
from other platform drivers, and include the framebuffer_coreboot module
if we find the device. For MODULES=most, add driver to the framebuffer
modules list. Explicitly try to probe the module for break=top because
it would not automatically probe there otherwise. Since it requires a
driver for the "simple-framebuffer" device, add simpledrm and simplefb
as its hidden dependencies.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
This commit is contained in:
Alper Nebi Yasak 2025-01-04 01:03:29 +03:00
parent d11ba241dc
commit 72899f8d89
2 changed files with 14 additions and 4 deletions
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16
hook-functions
View File

@ -639,14 +639,20 @@ dep_add_modules()
for device in /sys/bus/platform/drivers/efi-framebuffer/* \
/sys/bus/platform/drivers/platform-framebuffer/* \
/sys/bus/platform/drivers/simple-framebuffer/* \
/sys/bus/platform/drivers/vesa-framebuffer/* \
/sys/bus/coreboot/drivers/framebuffer/*; do
/sys/bus/platform/drivers/vesa-framebuffer/*; do
if [ -d "$device" ] && [ "$(basename "$device")" != "module" ]; then
walk_graphics=no
break
fi
done
for device in /sys/bus/coreboot/drivers/framebuffer/*; do
if [ -d "$device" ] && [ "$(basename "$device")" != "module" ]; then
modules="$modules framebuffer_coreboot"
walk_graphics=no
fi
done
# It's possible that a generic framebuffer device works, but is taken
# over by a more capable driver and no longer available in /sys. We
# have no reliable consistent way to detect that, so apply heuristics.
@ -850,7 +856,7 @@ auto_add_modules()
modules="$modules =drivers/usb/storage"
;;
fb)
modules="$modules simpledrm simplefb"
modules="$modules simpledrm simplefb framebuffer_coreboot"
# For machines that don't have a generic framebuffer device.
modules="$modules rockchipdrm pwm-cros-ec pwm_bl pwm-rockchip panel-simple"
modules="$modules analogix-anx6345 pwm-sun4i sun4i-drm sun8i-mixer panel-edp"
@ -942,6 +948,10 @@ hidden_dep_add_modules()
# DP devices which don't have devlinks
echo pmic_glink_altmode gpio_sbu_mux qrtr
;;
framebuffer_coreboot)
# Either one, we don't know which is a module
echo simpledrm simplefb
;;
esac
done
)

2
scripts/functions
View File

@ -103,7 +103,7 @@ maybe_break()
/sbin/modprobe ${opts} -a i8042 atkbd ehci-pci ehci-orion \
ehci-hcd ohci-hcd ohci-pci uhci-hcd usbhid xhci \
xhci-pci xhci-hcd
/sbin/modprobe ${opts} -a simpledrm simplefb
/sbin/modprobe ${opts} -a simpledrm simplefb framebuffer_coreboot
sleep 2
for modalias in /sys/bus/hid/devices/*/modalias; do
if [ -f "${modalias}" ]; then