linux-kernel - Re: [PATCH v2 3/5] media: nxp: imx8-isi: Add parallel camera input support

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Message-ID: <20250921221838.GC10540@pendragon.ideasonboard.com>
Date: Mon, 22 Sep 2025 01:18:38 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Guoniu Zhou <guoniu.zhou@....com>
Cc: 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>,
	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 v2 3/5] media: nxp: imx8-isi: Add parallel camera input
 support

Hi Guoniu,

Thank you for the patch.

The subject line should mention the i.MX93:

media: nxp: imx8-isi: Add parallel camera input support for i.MX93

On Fri, Sep 05, 2025 at 02:56:00PM +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>
> Reviewed-by: Frank Li <Frank.Li@....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 2f5e7299b537d612fb1fe6688c1b75bfd2d6049b..42b2ed2bbdf7259bc83d0678256343a3b606568a 100644
> --- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c
> +++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-gasket.c
> @@ -61,6 +61,7 @@ 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)

Let's spell this out fully to match the reference manual:

#define DISP_MIX_CAMERA_MUX_GASKET_SOURCE_TYPE  BIT(17)

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

>  static void mxc_imx93_gasket_enable(struct mxc_isi_dev *isi,
>  				    const struct v4l2_mbus_frame_desc *fd,
> @@ -71,6 +72,16 @@ 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);
>  }
>  

-- 
Regards,

Laurent Pinchart