* [PATCH] memory: mtk-smi: Add PM suspend and resume ops
@ 2019-10-09 11:59 Yong Wu
2019-10-15 12:30 ` Joerg Roedel
0 siblings, 1 reply; 2+ messages in thread
From: Yong Wu @ 2019-10-09 11:59 UTC (permalink / raw)
To: Matthias Brugger, Joerg Roedel
Cc: Will Deacon, Evan Green, Robin Murphy, Tomasz Figa,
linux-mediatek, srv_heupstream, linux-kernel, linux-arm-kernel,
iommu, yong.wu, youlin.pei, Nicolas Boichat, anan.sun,
ming-fan.chen
In the commit 4f0a1a1ae351 ("memory: mtk-smi: Invoke pm runtime_callback
to enable clocks"), we use pm_runtime callback to enable/disable the smi
larb clocks. It will cause the larb's clock may not be disabled when
suspend. That is because device_prepare will call pm_runtime_get_noresume
which will keep the larb's PM runtime status still is active when suspend,
then it won't enter our pm_runtime suspend callback to disable the
corresponding clocks.
This patch adds suspend pm_ops to force disable the clocks, Use "LATE" to
make sure it disable the larb's clocks after the multimedia devices.
Fixes: 4f0a1a1ae351 ("memory: mtk-smi: Invoke pm runtime_callback to enable clocks")
Signed-off-by: Anan Sun <anan.sun@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
base on v5.4-rc1.
---
drivers/memory/mtk-smi.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 439d7d8..a113e81 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -366,6 +366,8 @@ static int __maybe_unused mtk_smi_larb_suspend(struct device *dev)
static const struct dev_pm_ops smi_larb_pm_ops = {
SET_RUNTIME_PM_OPS(mtk_smi_larb_suspend, mtk_smi_larb_resume, NULL)
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
};
static struct platform_driver mtk_smi_larb_driver = {
@@ -507,6 +509,8 @@ static int __maybe_unused mtk_smi_common_suspend(struct device *dev)
static const struct dev_pm_ops smi_common_pm_ops = {
SET_RUNTIME_PM_OPS(mtk_smi_common_suspend, mtk_smi_common_resume, NULL)
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
};
static struct platform_driver mtk_smi_common_driver = {
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] memory: mtk-smi: Add PM suspend and resume ops
2019-10-09 11:59 [PATCH] memory: mtk-smi: Add PM suspend and resume ops Yong Wu
@ 2019-10-15 12:30 ` Joerg Roedel
0 siblings, 0 replies; 2+ messages in thread
From: Joerg Roedel @ 2019-10-15 12:30 UTC (permalink / raw)
To: Yong Wu
Cc: Matthias Brugger, Will Deacon, Evan Green, Robin Murphy,
Tomasz Figa, linux-mediatek, srv_heupstream, linux-kernel,
linux-arm-kernel, iommu, youlin.pei, Nicolas Boichat, anan.sun,
ming-fan.chen
On Wed, Oct 09, 2019 at 07:59:33PM +0800, Yong Wu wrote:
> In the commit 4f0a1a1ae351 ("memory: mtk-smi: Invoke pm runtime_callback
> to enable clocks"), we use pm_runtime callback to enable/disable the smi
> larb clocks. It will cause the larb's clock may not be disabled when
> suspend. That is because device_prepare will call pm_runtime_get_noresume
> which will keep the larb's PM runtime status still is active when suspend,
> then it won't enter our pm_runtime suspend callback to disable the
> corresponding clocks.
>
> This patch adds suspend pm_ops to force disable the clocks, Use "LATE" to
> make sure it disable the larb's clocks after the multimedia devices.
>
> Fixes: 4f0a1a1ae351 ("memory: mtk-smi: Invoke pm runtime_callback to enable clocks")
> Signed-off-by: Anan Sun <anan.sun@mediatek.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> base on v5.4-rc1.
> ---
> drivers/memory/mtk-smi.c | 4 ++++
> 1 file changed, 4 insertions(+)
Applied, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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