linux-kernel - [PATCH 05/18] media: rcar-isp: Move {enable|disable}

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Message-Id: <20250219-rcar-streams-v1-5-f1b93e370aab@ideasonboard.com>
Date: Wed, 19 Feb 2025 15:48:59 +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 05/18] media: rcar-isp: Move {enable|disable}_streams()
 calls

With multiple streams the operation to enable the ISP 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
risp_start() and risp_stop().

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
---
 drivers/media/platform/renesas/rcar-isp.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-isp.c b/drivers/media/platform/renesas/rcar-isp.c
index 46534a479201..8e222c9ec604 100644
--- a/drivers/media/platform/renesas/rcar-isp.c
+++ b/drivers/media/platform/renesas/rcar-isp.c
@@ -268,18 +268,11 @@ static int risp_start(struct rcar_isp *isp, struct v4l2_subdev_state *state)
 	/* Start ISP. */
 	risp_write(isp, ISPSTART_REG, ISPSTART_START);
 
-	ret = v4l2_subdev_enable_streams(isp->remote, isp->remote_pad,
-					 BIT_ULL(0));
-	if (ret)
-		risp_power_off(isp);
-
-	return ret;
+	return 0;
 }
 
 static void risp_stop(struct rcar_isp *isp)
 {
-	v4l2_subdev_disable_streams(isp->remote, isp->remote_pad, BIT_ULL(0));
-
 	/* Stop ISP. */
 	risp_write(isp, ISPSTART_REG, ISPSTART_STOP);
 
@@ -305,6 +298,13 @@ static int risp_enable_streams(struct v4l2_subdev *sd,
 			return ret;
 	}
 
+	ret = v4l2_subdev_enable_streams(isp->remote, isp->remote_pad,
+					 BIT_ULL(0));
+	if (ret) {
+		risp_stop(isp);
+		return ret;
+	}
+
 	isp->stream_count += 1;
 
 	return ret;
@@ -322,6 +322,8 @@ static int risp_disable_streams(struct v4l2_subdev *sd,
 	if (!isp->remote)
 		return -ENODEV;
 
+	v4l2_subdev_disable_streams(isp->remote, isp->remote_pad, BIT_ULL(0));
+
 	if (isp->stream_count == 1)
 		risp_stop(isp);
 

-- 
2.43.0