device-purism-librem5: Disable modem power management (MR 3902)

According to
https://source.puri.sm/Librem5/linux/-/issues/303#note_160864 enabling
the modem power management results in a unreliable modem, but more power
savings.

With power management on the modem can disconnect at any time,
including during calls. This makes the Librem 5 a very bad phone.
Instead let's ensure it works as a phone with a semi-reliable modem
(there is still the sleep/resume issue
https://source.puri.sm/Librem5/linux/-/issues/423

) at the cost of
battery life.

As the Librem5's battery life is already poor, a little bit worse
isn't much different. Either way you need an external battery pack.

Signed-off-by: Alistair Francis <alistair@alistair23.me>

[ci:skip-build] already built successfully in CI

device/main/device-purism-librem5/0001-librem5-pm.udev-disable-PM-for-broadmobi-modem.patch

+From 1b280dda3734d42b02474a0628314afc58c2065f Mon Sep 17 00:00:00 2001
+From: Clayton Craft <clayton@craftyguy.net>
+Date: Thu, 17 Jun 2021 16:59:55 -0700
+Subject: [PATCH] librem5-pm.udev: disable PM for broadmobi modem
+
+Workaround for https://source.puri.sm/Librem5/linux-next/-/issues/303
+---
+ debian/librem5-base-defaults.librem5-pm.udev | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/debian/librem5-base-defaults.librem5-pm.udev b/debian/librem5-base-defaults.librem5-pm.udev
+index dc005bb..6abdb10 100644
+--- a/debian/librem5-base-defaults.librem5-pm.udev
++++ b/debian/librem5-base-defaults.librem5-pm.udev
+@@ -9,7 +9,7 @@ DEVPATH=="/devices/platform/soc@0/38100000.usb", TEST=="power/control", ATTR{pow
+ ### Enable power management for internal USB devices:
+ 
+ # Broadmobi BM818
+-SUBSYSTEM=="usb", ATTRS{idVendor}=="2020", ATTR{idProduct}=="2060", TEST=="power/control", ATTR{power/control}="auto"
++SUBSYSTEM=="usb", ATTRS{idVendor}=="2020", ATTR{idProduct}=="2060", TEST=="power/control", ATTR{power/control}="on"
+ SUBSYSTEM=="usb", ATTRS{idVendor}=="2020", ATTR{idProduct}=="2060", TEST=="power/autosuspend_delay_ms", ATTR{power/autosuspend_delay_ms}="2000"
+ 
+ # Cinterion PLS8
+-- 
+2.32.0
+

device/main/device-purism-librem5/APKBUILD

@@ -4,7 +4,7 @@
 # Co-Maintainer: Newbyte <newbyte@postmarketos.org>
 pkgname=device-purism-librem5
 pkgdesc="Purism Librem 5 Phone"
-pkgver=1.39
+pkgver=1.40
 pkgrel=0
 _confver=54
 _purismrel=1
@@ -41,6 +41,7 @@ source="
 	uboot-script.cmd
 	xorg.conf
 	70-librem5-xwayland-accel.sh
+	0001-librem5-pm.udev-disable-PM-for-broadmobi-modem.patch
 	0002-udev-cameras-use-correct-path-for-modprobe-on-Alpine.patch
 	l5-ship-mode.initd
 	l5-lockdown-support.initd
@@ -200,6 +201,7 @@ a0740e405781ec6ef765fdc9f5700c95adbb241c45c97b9384ba68cdece662cb216ca5918640042f
 659c1801b6172c137db091a5850b467b5c667a5d0392c3d4f9cd767916ded20f09a494ad3c07cae09e9151909aca13208d3d0c681e9d4ec15681078c7046444b  uboot-script.cmd
 1cbc65cf2cb8fad4b0332d012a0256a266205b9b64371f5c0dae09dbb7f1e45b254e8c43993b896097e9d7035a72d547d9bce1ab2133addc56a5abdb80b44616  xorg.conf
 fad386071fc45f9880a94cc8004fabd5d98b3e6a12606c98d8e72e0208f22ab54f03b921f5967a959782507e2bff67d2fa92e46d8cd242011a3afcdbda529279  70-librem5-xwayland-accel.sh
+f535b43b8defe75e72049e4eee181bfe821f6304a096413bccf6d08c8bb11b947fa1fee305af85616abd778745fadd52ebd610c2d135a4f907915b99ab2c526a  0001-librem5-pm.udev-disable-PM-for-broadmobi-modem.patch
 b45749fcddfd65a302b502bcabfa5828d1b63e45d844fd50e44009a756b919db20fe9526102947c0f0dfcdffe4a037e5050fe1b24fb915933ce0837f49759378  0002-udev-cameras-use-correct-path-for-modprobe-on-Alpine.patch
 c723764d507ccd4b04aa5ce79b1d1ebc131873cdc37a943cb0f92b8a08a3c69eb9e0d31fcd4589fd8c40a9676bae9897e4f12ec2ebe4db8214ac85669ef35a53  l5-ship-mode.initd
 f4b314d553655f7975445ac0a33099923e20dabb082c07e2cf6a78e4118c143d777dd4ad2c09cbc388600bdefe8deb3073fbd15b238772ddf09c66ac46415590  l5-lockdown-support.initd