linux-kernel - [PATCH 1/9] media: vim2m: Try to schedule a m2m device run on request submission

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Date:   Fri,  9 Mar 2018 11:09:25 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Cc:     Icenowy Zheng <icenowy@...c.xyz>,
        Florent Revest <revestflo@...il.com>,
        Alexandre Courbot <acourbot@...omium.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Thomas van Kleef <thomas@...sch.nl>,
        "Signed-off-by : Bob Ham" <rah@...trans.net>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: [PATCH 1/9] media: vim2m: Try to schedule a m2m device run on request submission

In the most basic use scenario, where only one output and one capture
buffers are queued and the request is submitted, there is no provision
to try to schedule a m2m device run.

This adds the appropriate call to the vim2m_request_submit so that it
can start in that scenario.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
---
 drivers/media/platform/vim2m.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c
index 02793dd9a330..578c9170083c 100644
--- a/drivers/media/platform/vim2m.c
+++ b/drivers/media/platform/vim2m.c
@@ -933,9 +933,20 @@ static int vim2m_request_submit(struct media_request *req,
 				struct media_request_entity_data *_data)
 {
 	struct v4l2_request_entity_data *data;
+	struct vim2m_ctx *ctx;
+	int rc;
 
 	data = to_v4l2_entity_data(_data);
-	return vb2_request_submit(data);
+
+	ctx = container_of(_data->entity, struct vim2m_ctx, req_entity.base);
+
+	rc = vb2_request_submit(data);
+	if (rc)
+		return rc;
+
+	v4l2_m2m_try_schedule(ctx->fh.m2m_ctx);
+
+	return 0;
 }
 
 static const struct media_request_entity_ops vim2m_request_entity_ops = {
-- 
2.16.2