linux-kernel - [PATCH v11 07/28] media: platform: Improve the implementation of the system PM ops

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Date:   Tue, 4 Aug 2020 11:40:41 +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>, Xia Jiang <xia.jiang@...iatek.com>
Subject: [PATCH v11 07/28] 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.

Reviewed-by: Tomasz Figa <tfiga@...omium.org>
Signed-off-by: Xia Jiang <xia.jiang@...iatek.com>
---
v11: no changes
---
 .../media/platform/mtk-jpeg/mtk_jpeg_core.c    | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index 7f74597262fc..ee4aaf618551 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -1207,24 +1207,22 @@ static __maybe_unused int mtk_jpeg_pm_resume(struct device *dev)
 
 static __maybe_unused int mtk_jpeg_suspend(struct device *dev)
 {
-	int ret;
-
-	if (pm_runtime_suspended(dev))
-		return 0;
+	struct mtk_jpeg_dev *jpeg = dev_get_drvdata(dev);
 
-	ret = mtk_jpeg_pm_suspend(dev);
-	return ret;
+	v4l2_m2m_suspend(jpeg->m2m_dev);
+	return pm_runtime_force_suspend(dev);
 }
 
 static __maybe_unused int mtk_jpeg_resume(struct device *dev)
 {
+	struct mtk_jpeg_dev *jpeg = dev_get_drvdata(dev);
 	int ret;
 
-	if (pm_runtime_suspended(dev))
-		return 0;
-
-	ret = mtk_jpeg_pm_resume(dev);
+	ret = pm_runtime_force_resume(dev);
+	if (ret < 0)
+		return ret;
 
+	v4l2_m2m_resume(jpeg->m2m_dev);
 	return ret;
 }
 
-- 
2.18.0