Pick "pm: disable all sleep states on BE-M1000 based boards"

http://git.altlinux.org/gears/k/kernel-image-std-def.git?p=kernel-image-std-def.git;a=commitdiff;h=612987425ef7da4ec7ac55a5ed03c2ad823f84a1

0632-pm-disable-all-sleep-states-on-BE-M1000-based-boards.patch

@@ -0,0 +1,59 @@
+From a73eeb303cb72ab88dcc9c6182484300c235ca00 Mon Sep 17 00:00:00 2001
+From: Alexey Sheplyakov <asheplyakov@altlinux.org>
+Date: Fri, 3 Sep 2021 19:41:08 +0400
+Subject: [PATCH] pm: disable all sleep states on BE-M1000 based boards
+
+These days desktop environments try to put computer into a sleep
+state after a certain period of inactivity. TF307 board is able
+to enter a sleep state, however it does *NOT* wakeup via power
+button or keyboard/mouse.
+
+Apparently the only wakeup sources on TF307 board are
+
+- Real time clock (RTC)
+- Ethernet
+
+Surprisingly BMC (board management controller) is NOT a wakeup
+source. Also tp_bmc driver does not use interrupts, and polls
+the device instead. Perhaps BMC is unable to generate interrupts
+at all?
+
+To avoid the problem disable all sleep states (including s2idle)
+on Baikal-M systems
+---
+ kernel/power/suspend.c | 12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
+index 32391acc806b..182947b94a37 100644
+--- a/kernel/power/suspend.c
++++ b/kernel/power/suspend.c
+@@ -30,6 +30,7 @@
+ #include <trace/events/power.h>
+ #include <linux/compiler.h>
+ #include <linux/moduleparam.h>
++#include <linux/of.h>
+ 
+ #include "power.h"
+ 
+@@ -237,6 +238,17 @@ EXPORT_SYMBOL_GPL(suspend_valid_only_mem);
+ 
+ static bool sleep_state_supported(suspend_state_t state)
+ {
++#ifdef CONFIG_OF
++	if (of_device_is_compatible(of_root, "baikal,baikal-m")) {
++		/* XXX: there are no wakeup sources except RTC and Ethernet
++		 * on BE-M1000 based boards. In other words, no way to wakeup
++		 * system via the keyboard or power button.
++		 * Thus even s2idle is unusable on BE-M1000 systems.
++		 */
++		pr_info("%s: no useful wakeup sources on Baikal-M", __func__);
++		return false;
++	}
++#endif
+ 	return state == PM_SUSPEND_TO_IDLE || (suspend_ops && suspend_ops->enter);
+ }
+ 
+-- 
+2.31.1
+

kernel.spec

@@ -377,6 +377,7 @@ Patch0628: 0628-drm-panfrost-Trim-affinity-for-Mali-T620.patch
 Patch0629: 0629-baikal_vdu_drm-_plane_atomic_check-actually-re-enabl.patch
 Patch0630: 0630-baikal_vdu-figure-out-LVDS-endpoint-count.patch
 Patch0631: 0631-panfrost-disable-devfreq-on-BE-M1000-SoC.patch
+Patch0633: 0632-pm-disable-all-sleep-states-on-BE-M1000-based-boards.patch
 
 # Disable AutoReq
 AutoReq: 	0