linux-kernel - [PATCH 3/5] media: nxp: imx8-isi: Add parallel camera input support

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Message-Id: <20250827-isi_imx93-v1-3-83e6b4b50c4d@nxp.com>
Date: Wed, 27 Aug 2025 17:53:50 +0800
From: Guoniu Zhou <guoniu.zhou@....com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Frank Li <frank.li@....com>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Guoniu Zhou <guoniu.zhou@....com>, 
 Alice Yuan <alice.yuan@....com>
Subject: [PATCH 3/5] media: nxp: imx8-isi: Add parallel camera input
 support

From: Alice Yuan <alice.yuan@....com>

The ISI module on i.MX93 implements one camera input which can be
connected to either of MIPI CSI-2 or parallel camera. The source
type can be selected by setting camera mux control register.

Signed-off-by: Alice Yuan <alice.yuan@....com>
Signed-off-by: Guoniu Zhou <guoniu.zhou@....com>
---
 drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c
index c05e26798032367813c8730550a7eec2f237b4eb..139226c46cf96d4086716f9f20a876b20eb0e22a 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c
@@ -59,6 +59,7 @@ const struct mxc_gasket_ops mxc_imx8_gasket_ops = {
 #define DISP_MIX_CAMERA_MUX                     0x30
 #define DISP_MIX_CAMERA_MUX_DATA_TYPE(x)        FIELD_PREP(GENMASK(8, 3), (x))
 #define DISP_MIX_CAMERA_MUX_GASKET_ENABLE       BIT(16)
+#define DISP_MIX_CAMERA_MUX_GASKET_SRC          BIT(17)
 
 static void mxc_imx93_gasket_enable(struct mxc_isi_dev *isi,
 				    const struct v4l2_mbus_frame_desc *fd,
@@ -69,6 +70,16 @@ static void mxc_imx93_gasket_enable(struct mxc_isi_dev *isi,
 
 	val = DISP_MIX_CAMERA_MUX_DATA_TYPE(fd->entry[0].bus.csi2.dt);
 	val |= DISP_MIX_CAMERA_MUX_GASKET_ENABLE;
+
+	/*
+	 * CAMERA MUX
+	 * - [17]:	Selects source input to gasket
+	 *		0: Data from MIPI CSI
+	 *		1: Data from parallel camera
+	 */
+	if (fd->type == V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL)
+		val |= DISP_MIX_CAMERA_MUX_GASKET_SRC;
+
 	regmap_write(isi->gasket, DISP_MIX_CAMERA_MUX, val);
 }
 

-- 
2.34.1