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From: Kaaira Gupta <kgupta@es.iitr.ac.in>
To: Helen Koike <helen.koike@collabora.com>,
	Shuah Khan <skhan@linuxfoundation.org>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	Kieran Bingham <kieran.bingham@ideasonboard.com>
Cc: Kaaira Gupta <kgupta@es.iitr.ac.in>
Subject: [PATCH v3 8/9] media: vimc: Join pipeline if one already exists
Date: Wed, 19 Aug 2020 23:34:41 +0530	[thread overview]
Message-ID: <20200819180442.11630-9-kgupta@es.iitr.ac.in> (raw)
In-Reply-To: <20200819180442.11630-1-kgupta@es.iitr.ac.in>

Start another capture, if one is already running, by checking for
existing pipe. If it exists already, don't fail to start second capture,
instead join it to the already running pipeline.
Use the same stream struct used by already running capture.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
---
 drivers/media/test-drivers/vimc/vimc-capture.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
index 73e5bdd17c57..4d20eda9335e 100644
--- a/drivers/media/test-drivers/vimc/vimc-capture.c
+++ b/drivers/media/test-drivers/vimc/vimc-capture.c
@@ -247,9 +247,15 @@ static int vimc_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
 	atomic_inc(&vcap->ved.use_count);
 	vcap->sequence = 0;
 
-	stream = kzalloc(sizeof(*stream), GFP_ATOMIC);
-	kref_init(&stream->refcount);
-	pipe = &stream->pipe;
+	if (vcap->ved.ent->pipe) {
+		pipe = vcap->ved.ent->pipe;
+		stream = container_of(pipe, struct vimc_stream, pipe);
+		kref_get(&stream->refcount);
+	} else {
+		stream = kzalloc(sizeof(*stream), GFP_ATOMIC);
+		kref_init(&stream->refcount);
+		pipe = &stream->pipe;
+	}
 
 	/* Start the media pipeline */
 	ret = media_pipeline_start(entity, pipe);
-- 
2.17.1


  parent reply	other threads:[~2020-08-19 18:05 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-19 18:04 [PATCH v3 0/9] media: vimc: Multiple stream support in vimc Kaaira Gupta
2020-08-19 18:04 ` [PATCH v3 1/9] media: vimc: Move get_source_entity to vimc-common Kaaira Gupta
2020-08-20 15:32   ` Kieran Bingham
2020-08-19 18:04 ` [PATCH v3 2/9] media: vimc: Add get_frame callback Kaaira Gupta
2020-08-20 15:36   ` Kieran Bingham
2020-09-12 10:01     ` Kaaira Gupta
2020-10-02 11:08     ` Dafna Hirschfeld
2020-08-19 18:04 ` [PATCH v3 3/9] media: vimc: Add usage count to subdevices Kaaira Gupta
2020-10-02 11:13   ` Dafna Hirschfeld
2020-08-19 18:04 ` [PATCH v3 4/9] media: vimc: Separate starting stream from pipeline initialisation Kaaira Gupta
2020-08-21 15:11   ` Dafna Hirschfeld
2020-08-21 21:01     ` Kaaira Gupta
2020-08-28 20:37       ` Dafna Hirschfeld
2020-09-02  9:56         ` Kieran Bingham
2020-09-12 10:21           ` Kaaira Gupta
2020-09-12 10:16         ` Kaaira Gupta
2020-08-19 18:04 ` [PATCH v3 5/9] media: vimc: Separate closing of stream and thread Kaaira Gupta
2020-09-02 10:13   ` Kieran Bingham
2020-09-12 10:28     ` Kaaira Gupta
2020-08-19 18:04 ` [PATCH v3 6/9] media: vimc: Serialize vimc_streamer_s_stream() Kaaira Gupta
2020-08-19 18:04 ` [PATCH v3 7/9] media: vimc: Dynamically allocate stream struct Kaaira Gupta
2020-09-02 10:29   ` Kieran Bingham
2020-09-12 10:39     ` Kaaira Gupta
2020-08-19 18:04 ` Kaaira Gupta [this message]
2020-09-02 10:40   ` [PATCH v3 8/9] media: vimc: Join pipeline if one already exists Kieran Bingham
2020-08-19 18:04 ` [PATCH v3 9/9] media: vimc: Run multiple captures on same thread Kaaira Gupta
2020-09-02 10:46   ` Kieran Bingham
2020-09-12 10:45     ` Kaaira Gupta
2020-09-02 10:51 ` [PATCH v3 0/9] media: vimc: Multiple stream support in vimc Kieran Bingham
2020-09-12 10:49   ` Kaaira Gupta

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