linux-kernel - Re: [PATCH v2 2/3] media: rockchip: add driver for the rockchip mipi csi-2 receiver

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Message-ID: <aRzub5Ak6DZpO5f/@lizhi-Precision-Tower-5810>
Date: Tue, 18 Nov 2025 17:08:47 -0500
From: Frank Li <Frank.li@....com>
To: Michael Riesch <michael.riesch@...labora.com>
Cc: Mehdi Djait <mehdi.djait@...ux.intel.com>,
	Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Hans Verkuil <hverkuil@...nel.org>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Sebastian Reichel <sebastian.reichel@...labora.com>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>,
	Collabora Kernel Team <kernel@...labora.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	linux-media@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] media: rockchip: add driver for the rockchip mipi
 csi-2 receiver

On Tue, Nov 18, 2025 at 07:59:14PM +0100, Michael Riesch wrote:
> Hi Frank,
>
> On 11/18/25 18:15, Frank Li wrote:
> > On Tue, Nov 18, 2025 at 12:12:26PM +0100, Michael Riesch via B4 Relay wrote:
> >> From: Michael Riesch <michael.riesch@...labora.com>
> >>
> >>[...]
> >> +#define CSI2HOST_N_LANES     0x04
> >> +#define CSI2HOST_CSI2_RESETN 0x10
> >> +#define CSI2HOST_PHY_STATE   0x14
> >> +#define CSI2HOST_ERR1	     0x20
> >> +#define CSI2HOST_ERR2	     0x24
> >> +#define CSI2HOST_MSK1	     0x28
> >> +#define CSI2HOST_MSK2	     0x2c
> >> +#define CSI2HOST_CONTROL     0x40
> >
> > Look like that is designware CSI2 controller, can we build common library
> > for all dwc csi2 controller, instead of every vendor create individual one.
> >
> > First try at
> > https://lore.kernel.org/linux-media/20250821-95_cam-v3-21-c9286fbb34b9@nxp.com/
> >
> > Toshiba have similar patch
> > https://lore.kernel.org/linux-media/aPZd39riAxqfw3mT@lizhi-Precision-Tower-5810/
> >
> > Frank
>
> This has been discussed already a while ago:
> https://lore.kernel.org/all/20250507083837.GA11152@pendragon.ideasonboard.com/

https://lore.kernel.org/all/20250702093806.GF16835@pendragon.ideasonboard.com/

Laurent Pinchart prevent imx93 DWC CSI2 driver at Jul, your discussion at
May, I think Laurent Pinchart change the mind.

We can choose not base on imx6, but we should create a standard dwc2 under
drivers/media/platform/synopsys/

Laurent Pinchart:

	Can you provide direction?

Frank

>
> Bottom line from Laurent:
>
> "Let's keep this driver Rockchip-specific then. Thanks for checking."
>
> >  [...]
> Best regards,
> Michael