linux-kernel - [PATCH v14 2/8] media: v4l2: Allow M2M job queuing w/o streaming CAP queue

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Message-Id: <20231108-wave5-v14-rebased-v14-2-0b4af1258656@collabora.com>
Date:   Wed, 08 Nov 2023 20:29:21 +0100
From:   Sebastian Fricke <sebastian.fricke@...labora.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Conor Dooley <conor+dt@...nel.org>,
        Nas Chung <nas.chung@...psnmedia.com>,
        Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jackson Lee <jackson.lee@...psnmedia.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Hans Verkuil <hverkuil@...all.nl>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Ivan Bornyakov <brnkv.i1@...il.com>,
        Deborah Brouwer <deborah.brouwer@...labora.com>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        devicetree@...r.kernel.org,
        Robert Beckett <bob.beckett@...labora.com>,
        Sebastian Fricke <sebastian.fricke@...labora.com>,
        linux-arm-kernel@...ts.infradead.org, kernel@...labora.com,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH v14 2/8] media: v4l2: Allow M2M job queuing w/o streaming CAP queue

Allow decoder drivers to enable set the ignore_streaming flag on their
CAPTURE queue, to allow queuing jobs to the M2M ready queue and perform
firmware sequence analysis with just a streaming OUTPUT queue and
available bitstream data.

Signed-off-by: Sebastian Fricke <sebastian.fricke@...labora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
---
 drivers/media/v4l2-core/v4l2-mem2mem.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 0cc30397fbad..9e983176542b 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -301,9 +301,12 @@ static void __v4l2_m2m_try_queue(struct v4l2_m2m_dev *m2m_dev,
 
 	dprintk("Trying to schedule a job for m2m_ctx: %p\n", m2m_ctx);
 
-	if (!m2m_ctx->out_q_ctx.q.streaming
-	    || !m2m_ctx->cap_q_ctx.q.streaming) {
-		dprintk("Streaming needs to be on for both queues\n");
+	if (!m2m_ctx->out_q_ctx.q.streaming ||
+	    (!m2m_ctx->cap_q_ctx.q.streaming && !m2m_ctx->ignore_cap_streaming)) {
+		if (!m2m_ctx->ignore_cap_streaming)
+			dprintk("Streaming needs to be on for both queues\n");
+		else
+			dprintk("Streaming needs to be on for the OUTPUT queue\n");
 		return;
 	}
 

-- 
2.25.1