device-bq-paella: enable display and touchscreen on boot (MR 1261)

device/testing/device-bq-paella/APKBUILD

@@ -3,14 +3,14 @@
 pkgname=device-bq-paella
 pkgdesc="BQ Aquaris X5 Cyanogen Edition"
 pkgver=1
-pkgrel=0
+pkgrel=1
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
 options="!check !archcheck"
 depends="postmarketos-base mkbootimg linux-postmarketos-qcom-msm8916 soc-qcom-msm8916"
 makedepends="devicepkg-dev"
-source="deviceinfo"
+source="deviceinfo modprobe.conf"
 subpackages="$pkgname-nonfree-firmware:nonfree_firmware"
 
 build() {
@@ -27,4 +27,5 @@ nonfree_firmware() {
 	mkdir "$subpkgdir"
 }
 
-sha512sums="e813ad9c744845b0520830bc14fe9ca603999d6b7fbc8309fa7a3a6816ebb102310ec99d7cf163fe2d5735ac65f8f7f43b3f584a7ec2d556d414ee88275facb5  deviceinfo"
+sha512sums="3408576753e6c0ec363a18a223387decb68e409961a95ddca289df975bb7d5a123a0958dcff82fd7d3d8f98236726c289555f3c8ab8447cc5523f4c12baf05ea  deviceinfo
+84ab0cbcdcab61aaceabff46d2c13aa29242a2eeab2f666ee996041f1969396a8124228c204d81aaf0b6427ee51b8a70bfdaa11b53c94390263d8af96a2fd511  modprobe.conf"

device/testing/device-bq-paella/deviceinfo

@@ -8,7 +8,7 @@ deviceinfo_codename="bq-paella"
 deviceinfo_year="2015"
 deviceinfo_dtb="qcom/msm8916-bq-paella"
 deviceinfo_append_dtb="true"
-deviceinfo_modules_initfs=""
+deviceinfo_modules_initfs="panel-yushun-nt35520 msm himax_852xES"
 deviceinfo_arch="aarch64"
 
 # Device related

device/testing/device-bq-paella/modprobe.conf

+#
+# There is a weird probe issue if both MSM DRM and the panel driver are built
+# as modules: When MSM DRM is loaded it registers the DSI bus for the panel.
+# At this point the panel is not loaded yet, so the kernel sends an uevent
+# to userspace to load the necessary panel module.
+#
+# This causes some delay until the panel module is loaded, so MSM DRM fails to
+# probe temporarily and returns -EPROBE_DEFER (to request probing again later).
+# Unfortunately this will also unregister the DSI bus for the panel, and the
+# kernel will not try probing MSM DRM + panel again until some other (slow)
+# driver loads after MSM DRM.
+#
+# Usually WCNSS (WiFi/BT) fits that criteria, allowing the display to work.
+# But this does not work if the user decides to exclude proprietary firmware.
+#
+# To avoid this problem we add an explicit soft dependency for MSM DRM
+# on the panel module, so modprobe loads the panel module first and MSM DRM
+# will immediately find the panel it is looking for.
+#
+softdep msm pre: panel-yushun-nt35520