qcacld-3.0: Allow suspend in Deep Sleep/Hibernate in wearables

Deep Sleep or Hibernate are system level mode power
modes wearable targets in which wlan firmware is shutdown
gracefully and linux kernel and platform are suspended.

Currently, wlan suspend and pm_suspend is not allowed if
firmware is down, with this change suspend is allowed if firmware
is down due to Deep Sleep or Hibernate low power state.

Change-Id: Ide7b8957d1cfe455d57769c30f0bb3d6e564cddc
CRs-Fixed: 3108081

core/hdd/src/wlan_hdd_driver_ops.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2015-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -1201,9 +1201,12 @@ static int __wlan_hdd_bus_suspend(struct wow_enable_params wow_params,
 	hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 
 	err = wlan_hdd_validate_context(hdd_ctx);
-	if (err)
-		return err;
-
+	if (0 != err) {
+		if (pld_is_low_power_mode(hdd_ctx->parent_dev))
+			hdd_debug("low power mode (Deep Sleep/Hibernate)");
+		else
+			return err;
+	}
 
 	/* If Wifi is off, return success for system suspend */
 	if (hdd_ctx->driver_status != DRIVER_MODULES_ENABLED) {
@@ -1897,8 +1900,13 @@ static int wlan_hdd_pld_suspend(struct device *dev,
 	hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 
 	errno = wlan_hdd_validate_context(hdd_ctx);
-	if (errno)
-		return errno;
+	if (0 != errno) {
+		if (pld_is_low_power_mode(hdd_ctx->parent_dev))
+			hdd_debug("low power mode (Deep Sleep/Hibernate)");
+		else
+			return errno;
+	}
+
 	/*
 	 * Flush the idle shutdown before ops start.This is done here to avoid
 	 * the deadlock as idle shutdown waits for the dsc ops

core/hdd/src/wlan_hdd_power.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2012-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -2732,8 +2732,12 @@ static int _wlan_hdd_cfg80211_suspend_wlan(struct wiphy *wiphy,
 	}
 
 	errno = wlan_hdd_validate_context(hdd_ctx);
-	if (errno)
-		return errno;
+	if (0 != errno) {
+		if (pld_is_low_power_mode(hdd_ctx->parent_dev))
+			hdd_debug("low power mode (Deep Sleep/Hibernate)");
+		else
+			return errno;
+	}
 
 	hif_ctx = cds_get_context(QDF_MODULE_ID_HIF);
 	if (!hif_ctx)
@@ -2760,8 +2764,12 @@ int wlan_hdd_cfg80211_suspend_wlan(struct wiphy *wiphy,
 	struct hdd_context *hdd_ctx = wiphy_priv(wiphy);
 
 	errno = wlan_hdd_validate_context(hdd_ctx);
-	if (0 != errno)
-		return errno;
+	if (0 != errno) {
+		if (pld_is_low_power_mode(hdd_ctx->parent_dev))
+			hdd_debug("low power mode (Deep Sleep/Hibernate)");
+		else
+			return errno;
+	}
 
 	/*
 	 * Flush the idle shutdown before ops start.This is done here to avoid