Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To:     linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev
Cc:     Yong Deng <yong.deng@magewell.com>,
        Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Samuel Holland <samuel@sholland.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: [PATCH v6 13/43] media: sun6i-csi: Add media ops with link notify callback
Date:   Fri, 26 Aug 2022 20:32:10 +0200
Message-Id: <20220826183240.604834-14-paul.kocialkowski@bootlin.com>
In-Reply-To: <20220826183240.604834-1-paul.kocialkowski@bootlin.com>
References: <20220826183240.604834-1-paul.kocialkowski@bootlin.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

In order to keep the power use count fields balanced when link changes
happen between v4l2_pipeline_pm_get/set calls (in open/close),
the link_notify media operation callback needs to be registered.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index d74eaa3132d6..8b99c17e8403 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
@@ -23,6 +23,7 @@
 #include <linux/sched.h>
 #include <linux/sizes.h>
 #include <linux/slab.h>
+#include <media/v4l2-mc.h>
 
 #include "sun6i_csi.h"
 #include "sun6i_csi_reg.h"
@@ -574,6 +575,12 @@ void sun6i_csi_set_stream(struct sun6i_csi_device *csi_dev, bool enable)
 			   CSI_CAP_CH0_VCAP_ON);
 }
 
+/* Media */
+
+static const struct media_device_ops sun6i_csi_media_ops = {
+	.link_notify = v4l2_pipeline_link_notify,
+};
+
 /* V4L2 */
 
 static int sun6i_csi_link_entity(struct sun6i_csi_device *csi_dev,
@@ -681,6 +688,7 @@ static int sun6i_csi_v4l2_setup(struct sun6i_csi_device *csi_dev)
 	strscpy(media_dev->model, SUN6I_CSI_DESCRIPTION,
 		sizeof(media_dev->model));
 	media_dev->hw_revision = 0;
+	media_dev->ops = &sun6i_csi_media_ops;
 	media_dev->dev = dev;
 
 	media_device_init(media_dev);
-- 
2.37.1