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From 4f1d387b777425aead44232bd2c3d5c3517d4ff8 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Thu, 9 Dec 2021 16:35:11 +0100
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Subject: [PATCH] fix(drm): add privacy screen modules to the initrd
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Starting with kernel 5.17 the kernel supports the builtin privacy screens
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built into the LCD panel of some new laptop models.
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This means that the drm drivers will now return -EPROBE_DEFER from their
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probe() method on models with a builtin privacy screen when the privacy
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screen provider driver has not been loaded yet.
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Make dracut add the privacy screen providing drivers to the initrd
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(when necessary for hostmode=yes), so that drm drivers on affected
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drivers can probe() successfully.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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modules.d/50drm/module-setup.sh | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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diff --git a/modules.d/50drm/module-setup.sh b/modules.d/50drm/module-setup.sh
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index aca01505..cff0550c 100755
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--- a/modules.d/50drm/module-setup.sh
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+++ b/modules.d/50drm/module-setup.sh
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@@ -29,6 +29,8 @@ installkernel() {
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# as we could e.g. be in the installer; nokmsboot boot parameter will disable
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# loading of the driver if needed
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if [[ $hostonly ]]; then
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+ local i modlink modname
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+
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for i in /sys/bus/{pci/devices,platform/devices,virtio/devices,soc/devices/soc?}/*/modalias; do
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[[ -e $i ]] || continue
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[[ -n $(< "$i") ]] || continue
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@@ -39,7 +41,19 @@ installkernel() {
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fi
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fi
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done
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+ # if there is a privacy screen then its driver must be loaded before the
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+ # kms driver will bind, otherwise its probe() will return -EPROBE_DEFER
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+ # note privacy screens always register, even with e.g. nokmsboot
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+ for i in /sys/class/drm/privacy_screen-*/device/driver/module; do
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+ [[ -L $i ]] || continue
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+ modlink=$(readlink "$i")
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+ modname=$(basename "$modlink")
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+ instmods "$modname"
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+ done
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else
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dracut_instmods -o -s "drm_crtc_init|drm_dev_register|drm_encoder_init" "=drivers/gpu/drm" "=drivers/staging"
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+ # also include privacy screen providers (see above comment)
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+ # atm all providers live under drivers/platform/x86
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+ dracut_instmods -o -s "drm_privacy_screen_register" "=drivers/platform/x86"
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fi
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}
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--
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2.33.1
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