[PATCH 8/8] drm/arm/malidp: Added the late system pm functions

[Ayan Kumar Halder <ayan.halder@arm.com>]

malidp_pm_suspend_late checks if the runtime status is not suspended
and if so, invokes malidp_runtime_pm_suspend which disables the
display engine/core interrupts and the clocks. It sets the runtime status
as suspended. Subsequently, malidp_pm_resume_early will invoke
malidp_runtime_pm_resume which enables the clocks and the interrupts
(previously disabled) and sets the runtime status as active.

Signed-off-by: Ayan Kumar Halder <ayan.halder@arm.com>
Change-Id: I5f8c3d28f076314a1c9da2a46760a9c37039ccda
---
 drivers/gpu/drm/arm/malidp_drv.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index bd44a6d..f6124d8 100644
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -766,8 +766,25 @@ static int __maybe_unused malidp_pm_resume(struct device *dev)
 	return 0;
 }
 
+static int __maybe_unused malidp_pm_suspend_late(struct device *dev)
+{
+	if (!pm_runtime_status_suspended(dev)) {
+		malidp_runtime_pm_suspend(dev);
+		pm_runtime_set_suspended(dev);
+	}
+	return 0;
+}
+
+static int __maybe_unused malidp_pm_resume_early(struct device *dev)
+{
+	malidp_runtime_pm_resume(dev);
+	pm_runtime_set_active(dev);
+	return 0;
+}
+
 static const struct dev_pm_ops malidp_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend_late, malidp_pm_resume_early) \
 	SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL)
 };
 
-- 
2.7.4