linux-kernel - [PATCH 1/3] media: rzg2l-cru: Skip ICnMC configuration when ICnSVC is used

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Message-ID: <b9aeabb34829b8e97559610a3d00ef67399a300c.1767114395.git.tommaso.merciai.xr@bp.renesas.com>
Date: Tue, 30 Dec 2025 18:09:15 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Hans Verkuil <hverkuil@...nel.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Daniel Scally <dan.scally+renesas@...asonboard.com>,
	Jacopo Mondi <jacopo.mondi@...asonboard.com>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH 1/3] media: rzg2l-cru: Skip ICnMC configuration when ICnSVC is used

When the CRU is configured to use ICnSVC for virtual channel mapping,
as on the RZ/{G3E, V2H/P} SoC, the ICnMC register must not be
programmed.

Return early after setting up ICnSVC to avoid overriding the ICnMC
register, which is not applicable in this mode.

This prevents unintended register programming when ICnSVC is enabled.

Fixes: 3c5ca0a48bb0 ("media: rzg2l-cru: Drop function pointer to configure CSI")
Cc: stable@...r.kernel.org
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
 drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
index 162e2ace6931..480e9b5dbcfe 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
@@ -268,6 +268,8 @@ static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru,
 		rzg2l_cru_write(cru, ICnSVCNUM, csi_vc);
 		rzg2l_cru_write(cru, ICnSVC, ICnSVC_SVC0(0) | ICnSVC_SVC1(1) |
 				ICnSVC_SVC2(2) | ICnSVC_SVC3(3));
+
+		return;
 	}
 
 	icnmc |= rzg2l_cru_read(cru, info->image_conv) & ~ICnMC_INF_MASK;
-- 
2.43.0