[PATCH v6 11/23] phy: rockchip: usbdp: Support single-lane DP

[sashiko-bot at kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] The devicetree bindings schema for 'rockchip,dp-lane-mux' was not updated to allow single-item arrays, which will cause dtbs_check validation errors when using the newly added single-lane DP feature.
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commit 1f02bccf35aefcbe053f784a52330f63bbd49988
Author: Zhang Yubing <yubing.zhang at rock-chips.com>

phy: rockchip: usbdp: Support single-lane DP

This commit implements support for using a single DisplayPort lane in the
Rockchip USB/DP PHY driver. It updates the lane configuration and devicetree
parsing logic to handle single-lane setups.

> diff --git a/drivers/phy/rockchip/phy-rockchip-usbdp.c b/drivers/phy/rockchip/phy-rockchip-usbdp.c
> index 2ff05ef6eeacd..a87cb5c0596e7 100644
> --- a/drivers/phy/rockchip/phy-rockchip-usbdp.c
> +++ b/drivers/phy/rockchip/phy-rockchip-usbdp.c
[ ... ]
> @@ -897,7 +884,7 @@ static int rk_udphy_parse_lane_mux_data(struct rk_udphy *udphy)
>  		return 0;
>  	}
>  
> -	if (num_lanes != 2 && num_lanes != 4)
> +	if (num_lanes != 1 && num_lanes != 2 && num_lanes != 4)
>  		return dev_err_probe(udphy->dev, -EINVAL,
>  				     "invalid number of lane mux\n");

[Severity: Low]
Does this change also require an update to the devicetree bindings schema?

It looks like Documentation/devicetree/bindings/phy/phy-rockchip-usbdp.yaml
still restricts rockchip,dp-lane-mux to a minimum of 2 items:

  rockchip,dp-lane-mux:
    $ref: /schemas/types.yaml#/definitions/uint32-array
    minItems: 2
    maxItems: 4

Could this cause dtbs_check validation errors when valid device trees start
using the new 1-lane configuration?

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Sashiko AI review · https://sashiko.dev/#/patchset/20260619-rockchip-usbdp-cleanup-v6-0-3bb1f54b3f35@collabora.com?part=11