icnss2: Add Low power mode to icnss driver state

Deep Sleep is a system wide low power mode during which
Modem would be brought down and DDR would be in self
refresh mode (suspend-to-RAM) thus platform driver on
receiving deep sleep indication goes to a state similar
to SSR apart from the fact that FW is not crashed but
deliberately brought down.

In msm-5.15, there are no seperate notifications used
for deep sleep, notifications used for hibernate like
BEFORE_SHUTDOWN, AFTER_SHUTDOWN, BEFORE_POWERUP and
AFTER_POWERUP are used for deep sleep also.

In this commit add only low power mode state to
icnss driver state.

Change-Id: I4b12c5a8841e3cfc3e5e44ab6d9dff141e472876
CRs-Fixed: 3394501

icnss2/debug.c

@@ -422,6 +422,9 @@ static int icnss_stats_show_state(struct seq_file *s, struct icnss_priv *priv)
 			continue;
 		case ICNSS_SLATE_UP:
 			seq_puts(s, "ICNSS SLATE UP");
+			continue;
+		case ICNSS_LOW_POWER:
+			seq_puts(s, "ICNSS LOW POWER");
 		}
 
 		seq_printf(s, "UNKNOWN-%d", i);

icnss2/main.c

@@ -519,6 +519,15 @@ static int icnss_send_smp2p(struct icnss_priv *priv,
 	return ret;
 }
 
+bool icnss_is_low_power(void)
+{
+	if (!penv)
+		return false;
+	else
+		return test_bit(ICNSS_LOW_POWER, &penv->state);
+}
+EXPORT_SYMBOL(icnss_is_low_power);
+
 static irqreturn_t fw_error_fatal_handler(int irq, void *ctx)
 {
 	struct icnss_priv *priv = ctx;
@@ -1092,6 +1101,7 @@ static int icnss_pd_restart_complete(struct icnss_priv *priv)
 	clear_bit(ICNSS_PDR, &priv->state);
 	clear_bit(ICNSS_REJUVENATE, &priv->state);
 	clear_bit(ICNSS_PD_RESTART, &priv->state);
+	clear_bit(ICNSS_LOW_POWER, &priv->state);
 	priv->early_crash_ind = false;
 	priv->is_ssr = false;
 
@@ -2159,14 +2169,16 @@ static int icnss_modem_notifier_nb(struct notifier_block *nb,
 	icnss_pr_vdbg("Modem-Notify: event %s(%lu)\n",
 		      icnss_qcom_ssr_notify_state_to_str(code), code);
 
-	if (code == QCOM_SSR_AFTER_SHUTDOWN) {
+	switch (code) {
+	case QCOM_SSR_BEFORE_SHUTDOWN:
+		break;
+	case QCOM_SSR_AFTER_SHUTDOWN:
 		icnss_pr_info("Collecting msa0 segment dump\n");
 		icnss_msa0_ramdump(priv);
 		goto out;
-	}
-
-	if (code != QCOM_SSR_BEFORE_SHUTDOWN)
+	default:
 		goto out;
+	}
 
 	priv->is_ssr = true;
 

icnss2/main.h

@@ -128,6 +128,7 @@ enum icnss_driver_state {
 	ICNSS_QMI_DMS_CONNECTED,
 	ICNSS_SLATE_SSR_REGISTERED,
 	ICNSS_SLATE_UP,
+	ICNSS_LOW_POWER,
 };
 
 struct ce_irq_list {

inc/icnss2.h

@@ -177,6 +177,7 @@ extern unsigned int icnss_socinfo_get_serial_number(struct device *dev);
 extern bool icnss_is_qmi_disable(struct device *dev);
 extern bool icnss_is_fw_ready(void);
 extern bool icnss_is_fw_down(void);
+extern bool icnss_is_low_power(void);
 extern bool icnss_is_rejuvenate(void);
 extern int icnss_trigger_recovery(struct device *dev);
 extern void icnss_block_shutdown(bool status);