linux-kernel - Re: [PATCH v10 07/13] media: rockchip: add driver for mipi csi-2 receiver

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Message-ID: <c5d8d527ca6194b606b5627e51abbb82ab6dd76c.camel@pengutronix.de>
Date: Mon, 25 Aug 2025 12:37:14 +0200
From: Philipp Zabel <p.zabel@...gutronix.de>
To: michael.riesch@...labora.com, Mehdi Djait <mehdi.djait@...ux.intel.com>,
  Maxime Chevallier <maxime.chevallier@...tlin.com>, Théo
 Lebrun <theo.lebrun@...tlin.com>,  Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, Gerald Loacker
 <gerald.loacker@...fvision.net>, Bryan O'Donoghue
 <bryan.odonoghue@...aro.org>, Markus Elfring <Markus.Elfring@....de>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, Mauro Carvalho Chehab
 <mchehab@...nel.org>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner
 <heiko@...ech.de>, Kever Yang <kever.yang@...k-chips.com>, Nicolas Dufresne
 <nicolas.dufresne@...labora.com>,  Sebastian Reichel
 <sebastian.reichel@...labora.com>, Collabora Kernel Team
 <kernel@...labora.com>, Paul Kocialkowski <paulk@...-base.io>, Alexander
 Shiyan <eagle.alexander923@...il.com>, Val Packett <val@...kett.cool>, Rob
 Herring <robh@...nel.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v10 07/13] media: rockchip: add driver for mipi csi-2
 receiver

On Di, 2025-08-19 at 01:25 +0200, Michael Riesch via B4 Relay wrote:
> From: Michael Riesch <michael.riesch@...labora.com>
> 
> The Rockchip RK3568 MIPI CSI-2 Receiver is a CSI-2 bridge with one
> input port and one output port. It receives the data with the help
> of an external MIPI PHY (C-PHY or D-PHY) and passes it to the
> Rockchip RK3568 Video Capture (VICAP) block.
> 
> Add a V4L2 subdevice driver for this unit.
> 
> Signed-off-by: Michael Riesch <michael.riesch@...fvision.net>
> Signed-off-by: Michael Riesch <michael.riesch@...labora.com>
> ---
>  MAINTAINERS                                    |   1 +
>  drivers/media/platform/rockchip/Kconfig        |   1 +
>  drivers/media/platform/rockchip/Makefile       |   1 +
>  drivers/media/platform/rockchip/rkcsi/Kconfig  |  16 +
>  drivers/media/platform/rockchip/rkcsi/Makefile |   3 +
>  drivers/media/platform/rockchip/rkcsi/rkcsi.c  | 741 +++++++++++++++++++++++++
>  6 files changed, 763 insertions(+)
> 
[...]
> diff --git a/drivers/media/platform/rockchip/rkcsi/rkcsi.c b/drivers/media/platform/rockchip/rkcsi/rkcsi.c
> new file mode 100644
> index 000000000000..5658ffb60769
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/rkcsi/rkcsi.c
> @@ -0,0 +1,741 @@
[...]
> +static int rkcsi_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct rkcsi_device *csi_dev;
> +	int ret;
> +
> +	csi_dev = devm_kzalloc(dev, sizeof(*csi_dev), GFP_KERNEL);
> +	if (!csi_dev)
> +		return -ENOMEM;
> +	csi_dev->dev = dev;
> +	dev_set_drvdata(dev, csi_dev);
> +
> +	csi_dev->base_addr = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(csi_dev->base_addr))
> +		return PTR_ERR(csi_dev->base_addr);
> +
> +	ret = devm_clk_bulk_get_all(dev, &csi_dev->clks);
> +	if (ret != RKCSI_CLKS_MAX)
> +		return dev_err_probe(dev, -ENODEV, "failed to get clocks\n");
> +	csi_dev->clks_num = ret;
> +
> +	csi_dev->phy = devm_phy_get(dev, NULL);
> +	if (IS_ERR(csi_dev->phy))
> +		return dev_err_probe(dev, PTR_ERR(csi_dev->phy),
> +				     "failed to get MIPI CSI PHY\n");
> +
> +	csi_dev->reset = devm_reset_control_array_get_exclusive(dev);

Why array? rockchip,rk3568-mipi-csi bindings specify a single reset.

regards
Philipp