linux-kernel - [PATCH RESEND v9 07/18] media: platform: Improve the implementation of the system PM ops

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Date:   Thu, 4 Jun 2020 17:05:42 +0800
From:   Xia Jiang <xia.jiang@...iatek.com>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rick Chang <rick.chang@...iatek.com>
CC:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tfiga@...omium.org>,
        <srv_heupstream@...iatek.com>, <senozhatsky@...omium.org>,
        <mojahsu@...omium.org>, <drinkcat@...omium.org>,
        <maoguang.meng@...iatek.com>, <sj.huang@...iatek.com>,
        Xia Jiang <xia.jiang@...iatek.com>
Subject: [PATCH RESEND v9 07/18] media: platform: Improve the implementation of the system PM ops

Add v4l2_m2m_suspend() function call in mtk_jpeg_suspend() to make sure
that the current frame is processed completely before suspend.
Add v4l2_m2m_resume() function call in mtk_jpeg_resume() to unblock the
driver from scheduling next frame.

Signed-off-by: Xia Jiang <xia.jiang@...iatek.com>
---
v9: use v4l2_m2m_suspend() and v4l2_m2m_resume() to improve the
    implemention of the system PM ops
---
 drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index 7f74597262fc..49bdbf1c435f 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -1208,10 +1208,13 @@ static __maybe_unused int mtk_jpeg_pm_resume(struct device *dev)
 static __maybe_unused int mtk_jpeg_suspend(struct device *dev)
 {
 	int ret;
+	struct mtk_jpeg_dev *jpeg = dev_get_drvdata(dev);
 
 	if (pm_runtime_suspended(dev))
 		return 0;
 
+	v4l2_m2m_suspend(jpeg->m2m_dev);
+
 	ret = mtk_jpeg_pm_suspend(dev);
 	return ret;
 }
@@ -1219,12 +1222,15 @@ static __maybe_unused int mtk_jpeg_suspend(struct device *dev)
 static __maybe_unused int mtk_jpeg_resume(struct device *dev)
 {
 	int ret;
+	struct mtk_jpeg_dev *jpeg = dev_get_drvdata(dev);
 
 	if (pm_runtime_suspended(dev))
 		return 0;
 
 	ret = mtk_jpeg_pm_resume(dev);
 
+	v4l2_m2m_resume(jpeg->m2m_dev);
+
 	return ret;
 }
 
-- 
2.18.0