device-tablet-x86uefi: new device (MR 1913)

This is a generic package for devices which use x86_64 CPU and 32-bit
EFI. Most distributions don't provide installation for 32-bit EFI, so
installation is not user-friendly.

Actually, these tablets deserve device-specific packages (I am going to
make ones for ASUS VivoTab Note 8 and ASUS Transformer Book T100TA), but
this one includes basic functions and can be booted on any 32-bit EFI
tablet with disabled secure boot and missing device-specific package.
I guess 32-bit EFI with 64-bit CPU is Intel's "feature" and AMD doesn't
have such stuff, so this package will be installed only on devices with
Intel CPU, unlike device-tablet-x64uefi which can be installed on any
x86_64 PC. So i decided to enable some Intel specific things (userspace
GPU stuff and alsa-ucm-conf).

I used for reference device-tablet-x64uefi and
device-trekstor-surftabduow1 packages. This package also can be used as
a reference for device-specific ones.

device/testing/device-tablet-x86uefi/APKBUILD

@@ -0,0 +1,40 @@
+# Reference: <https://postmarketos.org/devicepkg>
+pkgname=device-tablet-x86uefi
+pkgdesc="Various tablets with atom CPU"
+pkgver=1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="x86_64"
+options="!check !archcheck"
+depends="postmarketos-base linux-lts mesa-dri-intel libva-intel-driver grub-x86 alsa-ucm-conf"
+makedepends="devicepkg-dev"
+source="deviceinfo grub.cfg rootston.ini"
+subpackages="$pkgname-phosh $pkgname-x11"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+	install -D "$srcdir"/grub.cfg \
+		"$pkgdir"/boot/grub/grub.cfg
+}
+
+# most tablets don't need scaling, at least x2
+phosh() {
+	install_if="$pkgname postmarketos-ui-phosh"
+	install -Dm644 "$srcdir"/rootston.ini \
+		"$subpkgdir"/etc/phosh/rootston.ini
+}
+
+x11() {
+	install_if="$pkgname=$pkgver-r$pkgrel xorg-server"
+	depends="xf86-video-modesetting"
+	mkdir "$subpkgdir"
+}
+
+sha512sums="fb6ada2de95a73630da3c57c58f51c32e18c5612796747e523b91e52e89547e6719af7cc542a74aac8d6f051d217c61fb6833258d254aaf04a4247d961d96990  deviceinfo
+16fbd525c3068bcfb1ccbf346e00b3e0c033dd8836c3e281eb947561aa8495d9339cba63feacaeb31bfc5a0c61a0a22c6ac24636b171e49794336d1b2e1ffc95  grub.cfg
+f3667b914bb955be9e97db31dc7ed4a7c5d0c369be9549d587bb7208e270590c0c3fa36a0dd997d6f8305c5c9afb3b906423af6ca8724e806f995e61226cfc83  rootston.ini"

device/testing/device-tablet-x86uefi/deviceinfo

@@ -0,0 +1,20 @@
+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Various tablets with atom CPU"
+deviceinfo_manufacturer="Various"
+deviceinfo_codename="tablet-x86uefi"
+deviceinfo_modules_initfs="jbd2 mbcache scsi_mod sd_mod sg libata sd ahci libahci usb_storage usb xhci_hcd ehci_hcd uas xhci_pci fat vfat nls_cp437 nls_utf8"
+deviceinfo_arch="x86_64"
+
+# Device related
+deviceinfo_chassis="tablet"
+deviceinfo_keyboard="false"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="800"
+deviceinfo_screen_height="600"
+
+# Bootloader related
+deviceinfo_flash_method="none"
+deviceinfo_boot_filesystem="fat16"

device/testing/device-tablet-x86uefi/grub.cfg

@@ -0,0 +1,6 @@
+timeout=0
+
+menuentry "postmarketOS" {
+	linux ($root)/vmlinuz-lts console=null
+	initrd ($root)/initramfs-lts
+}

device/testing/device-tablet-x86uefi/rootston.ini

@@ -0,0 +1,5 @@
+[cursor:seat0]
+map-to-output:DSI-1
+
+[output:DSI-1]
+scale = 1