From 4ffe79de7272234408a9179aa4c403ee1b67a362 Mon Sep 17 00:00:00 2001
From: Myy Miouyouyou <myy@miouyouyou.fr>
Date: Thu, 7 Dec 2017 21:27:52 +0100
Subject: [PATCH] soc: rockchip: power-domain: export idle request
We need to put the power status of HEVC/RKVDEC IP into IDLE
unless we can't reset that IP or the SoC would crash down.
rockchip_pmu_idle_request(dev, true)---> enter idle
rockchip_pmu_idle_request(dev, false)---> exit idle
Only the video codec drivers of rockchip platform would
request this patch currently.
I am not sure whether it is necessary to add a new function
at generic power domain. I want someone give me some advises
here.
Signed-off-by: Myy Miouyouyou <myy@miouyouyou.fr>
---
drivers/soc/rockchip/pm_domains.c | 23 +++++++++++++++++++++++
include/linux/rockchip_pmu.h | 15 +++++++++++++++
2 files changed, 38 insertions(+)
create mode 100644 include/linux/rockchip_pmu.h
diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 40b75748..0006ed53 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -180,6 +180,29 @@ static int rockchip_pmu_set_idle_request(struct rockchip_pm_domain *pd,
return 0;
}
+int rockchip_pmu_idle_request(struct device *dev, bool idle)
+{
+ struct generic_pm_domain *genpd;
+ struct rockchip_pm_domain *pd;
+ int ret;
+
+ if (IS_ERR_OR_NULL(dev))
+ return -EINVAL;
+
+ if (IS_ERR_OR_NULL(dev->pm_domain))
+ return -EINVAL;
+
+ genpd = pd_to_genpd(dev->pm_domain);
+ pd = to_rockchip_pd(genpd);
+
+ mutex_lock(&pd->pmu->mutex);
+ ret = rockchip_pmu_set_idle_request(pd, idle);
+ mutex_unlock(&pd->pmu->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(rockchip_pmu_idle_request);
+
static int rockchip_pmu_save_qos(struct rockchip_pm_domain *pd)
{
int i;
diff --git a/include/linux/rockchip_pmu.h b/include/linux/rockchip_pmu.h
new file mode 100644
index 00000000..720b3314
--- /dev/null
+++ b/include/linux/rockchip_pmu.h
@@ -0,0 +1,15 @@
+/*
+ * pm_domain.h - Definitions and headers related to device power domains.
+ *
+ * Copyright (C) 2017 Randy Li <ayaka@soulik.info>.
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef _LINUX_ROCKCHIP_PM_H
+#define _LINUX_ROCKCHIP_PM_H
+#include <linux/device.h>
+
+int rockchip_pmu_idle_request(struct device *dev, bool idle);
+
+#endif /* _LINUX_ROCKCHIP_PM_H */
--
2.14.1