From: Changhuang Liang <changhuang.liang@starfivetech.com>
To: Mauro Carvalho Chehab <mchehab@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Jack Zhu <jack.zhu@starfivetech.com>,
Changhuang Liang <changhuang.liang@starfivetech.com>,
Dan Carpenter <dan.carpenter@linaro.org>,
Jayshri Pawar <jpawar@cadence.com>, Jai Luthra <j-luthra@ti.com>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-staging@lists.linux.dev
Subject: [PATCH v1 4/4] staging: media: starfive: Add suspend and resume support
Date: Mon, 25 Mar 2024 20:12:37 -0700 [thread overview]
Message-ID: <20240326031237.25331-5-changhuang.liang@starfivetech.com> (raw)
In-Reply-To: <20240326031237.25331-1-changhuang.liang@starfivetech.com>
This patch implements suspend and resume operation for StarFive Camera
Subsystem. It supports hibernation during streaming and resume streaming
when the system wake-up stage.
Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
.../staging/media/starfive/camss/stf-camss.c | 49 +++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/drivers/staging/media/starfive/camss/stf-camss.c b/drivers/staging/media/starfive/camss/stf-camss.c
index a587f860101a..9abd8ee405e2 100644
--- a/drivers/staging/media/starfive/camss/stf-camss.c
+++ b/drivers/staging/media/starfive/camss/stf-camss.c
@@ -412,10 +412,59 @@ static int __maybe_unused stfcamss_runtime_resume(struct device *dev)
return 0;
}
+static int __maybe_unused stfcamss_suspend(struct device *dev)
+{
+ struct stfcamss *stfcamss = dev_get_drvdata(dev);
+ struct stfcamss_video *video;
+ unsigned int i;
+
+ for (i = 0; i < STF_CAPTURE_NUM; ++i) {
+ video = &stfcamss->captures[i].video;
+ if (video->vb2_q.streaming) {
+ video->ops->stop_streaming(video);
+ video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
+ }
+ }
+
+ return pm_runtime_force_suspend(dev);
+}
+
+static int __maybe_unused stfcamss_resume(struct device *dev)
+{
+ struct stfcamss *stfcamss = dev_get_drvdata(dev);
+ struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;
+ struct v4l2_subdev_state *sd_state;
+ struct stfcamss_video *video;
+ unsigned int i;
+ int ret;
+
+ ret = pm_runtime_force_resume(dev);
+ if (ret < 0) {
+ dev_err(dev, "Failed to resume\n");
+ return ret;
+ }
+
+ sd_state = v4l2_subdev_lock_and_get_active_state(&isp_dev->subdev);
+
+ if (isp_dev->subdev.enabled_streams)
+ stf_isp_stream_on(isp_dev, sd_state);
+
+ v4l2_subdev_unlock_state(sd_state);
+
+ for (i = 0; i < STF_CAPTURE_NUM; ++i) {
+ video = &stfcamss->captures[i].video;
+ if (video->vb2_q.streaming)
+ video->ops->start_streaming(video);
+ }
+
+ return 0;
+}
+
static const struct dev_pm_ops stfcamss_pm_ops = {
SET_RUNTIME_PM_OPS(stfcamss_runtime_suspend,
stfcamss_runtime_resume,
NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(stfcamss_suspend, stfcamss_resume)
};
static struct platform_driver stfcamss_driver = {
--
2.25.1
prev parent reply other threads:[~2024-03-26 3:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-26 3:12 [PATCH v1 0/4] Add StarFive Camera Subsystem hibernation support Changhuang Liang
2024-03-26 3:12 ` [PATCH v1 1/4] media: cadence: csi2rx: Support runtime PM Changhuang Liang
2024-03-26 3:12 ` [PATCH v1 2/4] media: cadence: csi2rx: Add suspend and resume support Changhuang Liang
2024-03-26 3:12 ` [PATCH v1 3/4] staging: media: starfive: Extract the ISP stream on as a helper function Changhuang Liang
2024-03-26 3:12 ` Changhuang Liang [this message]
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