From: Jerry-ch Chen <Jerry-Ch.chen@mediatek.com>
To: <hans.verkuil@cisco.com>,
<laurent.pinchart+renesas@ideasonboard.com>, <tfiga@chromium.org>,
<matthias.bgg@gmail.com>, <mchehab@kernel.org>
Cc: <pihsun@chromium.org>, <yuzhao@chromium.org>,
<zwisler@chromium.org>, <linux-mediatek@lists.infradead.org>,
<linux-arm-kernel@lists.infradead.org>, <Sean.Cheng@mediatek.com>,
<sj.huang@mediatek.com>, <christie.yu@mediatek.com>,
<frederic.chen@mediatek.com>, <Jerry-ch.Chen@mediatek.com>,
<jungo.lin@mediatek.com>, <Rynn.Wu@mediatek.com>,
<linux-media@vger.kernel.org>, <srv_heupstream@mediatek.com>,
<devicetree@vger.kernel.org>,
Jerry-ch Chen <jerry-ch.chen@mediatek.corp-partner.google.com>
Subject: [RFC PATCH V4 1/4] media: v4l2-mem2mem: add v4l2_m2m_suspend, v4l2_m2m_resume
Date: Wed, 4 Dec 2019 20:47:29 +0800 [thread overview]
Message-ID: <20191204124732.10932-2-Jerry-Ch.chen@mediatek.com> (raw)
In-Reply-To: <20191204124732.10932-1-Jerry-Ch.chen@mediatek.com>
From: Pi-Hsun Shih <pihsun@chromium.org>
Add two functions that can be used to stop new jobs from being queued /
continue running queued job. This can be used while a driver using m2m
helper is going to suspend / wake up from resume, and can ensure that
there's no job running in suspend process.
BUG=b:143046833
TEST=build
Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: Jerry-ch Chen <jerry-ch.chen@mediatek.corp-partner.google.com>
---
drivers/media/v4l2-core/v4l2-mem2mem.c | 40 ++++++++++++++++++++++++++
include/media/v4l2-mem2mem.h | 22 ++++++++++++++
2 files changed, 62 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 5bbdec55b7d7..76ba203e0035 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -47,6 +47,10 @@ module_param(debug, bool, 0644);
#define TRANS_ABORT (1 << 2)
+/* The job queue is not running new jobs */
+#define QUEUE_PAUSED (1 << 0)
+
+
/* Offset base for buffers on the destination queue - used to distinguish
* between source and destination buffers when mmapping - they receive the same
* offsets but for different queues */
@@ -88,6 +92,7 @@ static const char * const m2m_entity_name[] = {
* @job_queue: instances queued to run
* @job_spinlock: protects job_queue
* @job_work: worker to run queued jobs.
+ * @job_queue_flags: flags of the queue status, %QUEUE_PAUSED.
* @m2m_ops: driver callbacks
*/
struct v4l2_m2m_dev {
@@ -105,6 +110,7 @@ struct v4l2_m2m_dev {
struct list_head job_queue;
spinlock_t job_spinlock;
struct work_struct job_work;
+ unsigned long job_queue_flags;
const struct v4l2_m2m_ops *m2m_ops;
};
@@ -267,6 +273,12 @@ static void v4l2_m2m_try_run(struct v4l2_m2m_dev *m2m_dev)
return;
}
+ if (m2m_dev->job_queue_flags & QUEUE_PAUSED) {
+ spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+ dprintk("Running new jobs is paused\n");
+ return;
+ }
+
m2m_dev->curr_ctx = list_first_entry(&m2m_dev->job_queue,
struct v4l2_m2m_ctx, queue);
m2m_dev->curr_ctx->job_flags |= TRANS_RUNNING;
@@ -447,6 +459,34 @@ void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev,
}
EXPORT_SYMBOL(v4l2_m2m_job_finish);
+void v4l2_m2m_suspend(struct v4l2_m2m_dev *m2m_dev)
+{
+ unsigned long flags;
+ struct v4l2_m2m_ctx *curr_ctx;
+
+ spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+ m2m_dev->job_queue_flags |= QUEUE_PAUSED;
+ curr_ctx = m2m_dev->curr_ctx;
+ spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+ if (curr_ctx)
+ wait_event(curr_ctx->finished,
+ !(curr_ctx->job_flags & TRANS_RUNNING));
+}
+EXPORT_SYMBOL(v4l2_m2m_suspend);
+
+void v4l2_m2m_resume(struct v4l2_m2m_dev *m2m_dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+ m2m_dev->job_queue_flags &= ~QUEUE_PAUSED;
+ spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+ v4l2_m2m_try_run(m2m_dev);
+}
+EXPORT_SYMBOL(v4l2_m2m_resume);
+
int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_requestbuffers *reqbufs)
{
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
index 5467264771ec..119a195da390 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -183,6 +183,28 @@ v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state)
vb2_buffer_done(&buf->vb2_buf, state);
}
+/**
+ * v4l2_m2m_suspend() - stop new jobs from being run and wait for current job
+ * to finish
+ *
+ * @m2m_dev: opaque pointer to the internal data to handle M2M context
+ *
+ * Called by a driver in the suspend hook. Stop new jobs from being run, and
+ * wait for current running job to finish.
+ */
+void v4l2_m2m_suspend(struct v4l2_m2m_dev *m2m_dev);
+
+/**
+ * v4l2_m2m_resume() - resume job running and try to run a queued job
+ *
+ * @m2m_dev: opaque pointer to the internal data to handle M2M context
+ *
+ * Called by a driver in the resume hook. This reverts the operation of
+ * v4l2_m2m_suspend() and allows job to be run. Also try to run a queued job if
+ * there is any.
+ */
+void v4l2_m2m_resume(struct v4l2_m2m_dev *m2m_dev);
+
/**
* v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer
*
--
2.18.0
next prev parent reply other threads:[~2019-12-04 12:47 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-04 12:47 [RFC PATCH V4 0/4] media: platform: Add support for Face Detection (FD) on mt8183 SoC Jerry-ch Chen
2019-12-04 12:47 ` Jerry-ch Chen [this message]
2020-05-21 17:11 ` [RFC PATCH V4 1/4] media: v4l2-mem2mem: add v4l2_m2m_suspend, v4l2_m2m_resume Tomasz Figa
2020-05-22 6:01 ` Jerry-ch Chen
2020-06-10 10:28 ` Hans Verkuil
2020-06-10 10:32 ` Tomasz Figa
2020-06-10 18:52 ` Ezequiel Garcia
2020-06-10 19:03 ` Tomasz Figa
2020-06-10 19:14 ` Ezequiel Garcia
2020-06-10 19:26 ` Tomasz Figa
2020-06-14 22:43 ` Ezequiel Garcia
2019-12-04 12:47 ` [RFC PATCH V4 2/4] dt-bindings: mt8183: Added FD dt-bindings Jerry-ch Chen
2019-12-04 18:58 ` Rob Herring
2020-05-06 8:41 ` Jerry-ch Chen
2019-12-04 12:47 ` [RFC PATCH V4 3/4] dts: arm64: mt8183: Add FD nodes Jerry-ch Chen
2019-12-04 12:47 ` [RFC PATCH V4 4/4] platform: mtk-isp: Add Mediatek FD driver Jerry-ch Chen
2020-05-21 18:28 ` Tomasz Figa
2020-05-22 14:10 ` Jerry-ch Chen
2020-05-25 12:24 ` Tomasz Figa
2020-05-29 12:26 ` Jerry-ch Chen
2020-05-29 12:59 ` Tomasz Figa
2020-06-01 10:37 ` Jerry-ch Chen
2020-05-08 2:02 ` [RFC PATCH V4 0/4] media: platform: Add support for Face Detection (FD) on mt8183 SoC Jerry-ch Chen
2020-05-13 21:45 ` Tomasz Figa
2020-05-21 18:38 ` Tomasz Figa
2020-06-30 14:10 ` Jerry-ch Chen
2020-06-30 17:19 ` Tomasz Figa
2020-11-11 11:51 ` Jerry-ch Chen
2020-11-12 4:26 ` Tomasz Figa
2020-11-12 12:05 ` Jerry-ch Chen
2020-12-28 17:02 ` Jerry-ch Chen
2021-01-06 6:30 ` Tomasz Figa
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