linux-kernel - [PATCH 06/18] media: rcar-csi2: Move {enable|disable}

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Message-Id: <20250219-rcar-streams-v1-6-f1b93e370aab@ideasonboard.com>
Date: Wed, 19 Feb 2025 15:49:00 +0200
From: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
To: Niklas Söderlund <niklas.soderlund@...natech.se>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Niklas Söderlund <niklas.soderlund+renesas@...natech.se>, 
 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Jacopo Mondi <jacopo.mondi@...asonboard.com>, 
 Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
Subject: [PATCH 06/18] media: rcar-csi2: Move {enable|disable}_streams()
 calls

With multiple streams the operation to enable the CSI-2 hardware and to
call {enable|disable}_streams() on upstream subdev will need to be
handled separately.

Prepare for that by moving {enable|disable}_streams() calls out from
rcsi2_start() and rcsi2_stop().

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
---
 drivers/media/platform/renesas/rcar-csi2.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index 9979de4f6ef1..845fb3e155f1 100644
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -1571,20 +1571,12 @@ static int rcsi2_start(struct rcar_csi2 *priv, struct v4l2_subdev_state *state)
 		return ret;
 	}
 
-	ret = v4l2_subdev_enable_streams(priv->remote, priv->remote_pad,
-					 BIT_ULL(0));
-	if (ret) {
-		rcsi2_enter_standby(priv);
-		return ret;
-	}
-
 	return 0;
 }
 
 static void rcsi2_stop(struct rcar_csi2 *priv)
 {
 	rcsi2_enter_standby(priv);
-	v4l2_subdev_disable_streams(priv->remote, priv->remote_pad, BIT_ULL(0));
 }
 
 static int rcsi2_enable_streams(struct v4l2_subdev *sd,
@@ -1606,6 +1598,13 @@ static int rcsi2_enable_streams(struct v4l2_subdev *sd,
 			return ret;
 	}
 
+	ret = v4l2_subdev_enable_streams(priv->remote, priv->remote_pad,
+					 BIT_ULL(0));
+	if (ret) {
+		rcsi2_stop(priv);
+		return ret;
+	}
+
 	priv->stream_count += 1;
 
 	return ret;
@@ -1627,6 +1626,8 @@ static int rcsi2_disable_streams(struct v4l2_subdev *sd,
 	if (priv->stream_count == 1)
 		rcsi2_stop(priv);
 
+	v4l2_subdev_disable_streams(priv->remote, priv->remote_pad, BIT_ULL(0));
+
 	priv->stream_count -= 1;
 
 	return ret;

-- 
2.43.0