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

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Message-ID: <aK8WXIebmvo5lKRF@lizhi-Precision-Tower-5810>
Date: Wed, 27 Aug 2025 10:29:48 -0400
From: Frank Li <Frank.li@....com>
To: Guoniu Zhou <guoniu.zhou@....com>
Cc: 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>, linux-media@...r.kernel.org,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Alice Yuan <alice.yuan@....com>
Subject: Re: [PATCH 3/5] media: nxp: imx8-isi: Add parallel camera input
 support

On Wed, Aug 27, 2025 at 05:53:50PM +0800, Guoniu Zhou wrote:
> 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>
> ---

Reviewed-by: Frank Li <Frank.Li@....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
>