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Commit 8834c35b authored by Murali Nalajala's avatar Murali Nalajala Committed by Maulik Shah
Browse files

lpm-levels: Do not disable non-sec interrupts in suspend 



When the system suspend is happening, last core disables the non-sec
interrupts at QGIC by setting the GRPEN1_EL1_NS to ZERO. This prevents
the core from detecting  any non-sec interrupts and that would result
in the system not waking up from any of interrupts. Do not modify
GRPEN1_EL1_NS register when the system is going into suspend.

Change-Id: I7d6c5047fb4743df187fe49fba18b64db3179bc9
Signed-off-by: default avatarMurali Nalajala <mnalajal@codeaurora.org>
Signed-off-by: default avatarMahesh Sivasubramanian <msivasub@codeaurora.org>
parent 364475ab

drivers/irqchip/irq-gic-common.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -27,6 +27,7 @@ struct gic_quirk { 
	u32 iidr;

	u32 iidr;

	u32 mask;

	u32 mask;

};

};

extern bool from_suspend;





#ifdef CONFIG_QCOM_SHOW_RESUME_IRQ

#ifdef CONFIG_QCOM_SHOW_RESUME_IRQ

extern int msm_show_resume_irq_mask;

extern int msm_show_resume_irq_mask;

drivers/irqchip/irq-gic-v3.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -894,6 +894,9 @@ static bool gic_dist_security_disabled(void) 
static int gic_cpu_pm_notifier(struct notifier_block *self,

static int gic_cpu_pm_notifier(struct notifier_block *self,

			       unsigned long cmd, void *v)

			       unsigned long cmd, void *v)

{

{

	if (from_suspend)

		return NOTIFY_OK;



	if (cmd == CPU_PM_EXIT) {

	if (cmd == CPU_PM_EXIT) {

		if (gic_dist_security_disabled())

		if (gic_dist_security_disabled())

			gic_enable_redist(true);

			gic_enable_redist(true);

kernel/cpu_pm.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include <linux/spinlock.h>

#include <linux/spinlock.h>

#include <linux/syscore_ops.h>

#include <linux/syscore_ops.h>





bool from_suspend;



static ATOMIC_NOTIFIER_HEAD(cpu_pm_notifier_chain);

static ATOMIC_NOTIFIER_HEAD(cpu_pm_notifier_chain);





static int cpu_pm_notify(enum cpu_pm_event event, int nr_to_call, int *nr_calls)

static int cpu_pm_notify(enum cpu_pm_event event, int nr_to_call, int *nr_calls)
@@ -181,6 +183,7 @@ static int cpu_pm_suspend(void) 
{

{

	int ret;

	int ret;





	from_suspend = true;

	ret = cpu_pm_enter();

	ret = cpu_pm_enter();

	if (ret)

	if (ret)

		return ret;

		return ret;
@@ -191,6 +194,7 @@ static int cpu_pm_suspend(void) 




static void cpu_pm_resume(void)

static void cpu_pm_resume(void)

{

{

	from_suspend = false;

	cpu_cluster_pm_exit();

	cpu_cluster_pm_exit();

	cpu_pm_exit();

	cpu_pm_exit();

}

}