msm: rpm-smd: call SMD API to mask/unmask SMD interrupt.
When the system goes to sleep, the power management code sends a sleep
set to RPM. The code executes with interrupts disabled so the power
management code polls for ack message from RPM. Since the SMD interrupt
is in a triggered state and irq handler hasn't had a chance to run, the
pending interrupt prevent the Core from entering a low power mode.
To prevent interrupt from waking the system up, disable/enable the RPM to
SMD interrupt while entering/exiting sleep mode, by calling into the SMD
API.
Change-Id: I38faa18e6b1d7f4cc92d72c3da4ac8ca29275444
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
diff --git a/arch/arm/mach-msm/lpm_levels.c b/arch/arm/mach-msm/lpm_levels.c
index ea368ae..be59d7c 100644
--- a/arch/arm/mach-msm/lpm_levels.c
+++ b/arch/arm/mach-msm/lpm_levels.c
@@ -20,6 +20,7 @@
#include <mach/mpm.h>
#include "lpm_resources.h"
#include "pm.h"
+#include "rpm-notifier.h"
static struct msm_rpmrs_level *msm_lpm_levels;
static int msm_lpm_level_count;
@@ -41,14 +42,22 @@
{
int ret = 0;
+ ret = msm_rpm_enter_sleep();
+ if (ret) {
+ pr_warn("%s(): RPM failed to enter sleep err:%d\n",
+ __func__, ret);
+ goto bail;
+ }
ret = msm_lpmrs_enter_sleep((struct msm_rpmrs_limits *)limits,
from_idle, notify_rpm);
+bail:
return ret;
}
static void msm_lpm_exit_sleep(void *limits, bool from_idle,
bool notify_rpm, bool collapsed)
{
+ msm_rpm_exit_sleep();
msm_lpmrs_exit_sleep((struct msm_rpmrs_limits *)limits,
from_idle, notify_rpm, collapsed);
}