Re: [PATCH 09/13] drm/msm/dcp: Register DCP display pipeline

[Krzysztof Kozlowski <krzk@kernel.org>]

On 15/10/2026 09:38, Jayant Shekhar wrote:
> The DCP firmware exposes display resources through capabilities rather than
> through host-visible display registers. The MSM DRM backend therefore needs
> to build its KMS objects from the firmware capabilities and device-tree
> display graph.


...

> +
> +		remote_np = of_graph_get_remote_port_parent(ep_np);
> +		of_node_put(ep_np);
> +		if (!remote_np)
> +			continue;
> +
> +		if (!of_device_is_available(remote_np)) {
> +			of_node_put(remote_np);
> +			continue;
> +		}
> +
> +		if (of_node_name_prefix(remote_np, "dsi")) {

Where did you document the ABI?

> +			if (dsi_idx >= ARRAY_SIZE(dpu_kms->dsi_bridge)) {
> +				dev_err(dev->dev, "too many DSI outputs\n");
> +				ret = -E2BIG;
> +				goto out;
> +			}

Best regards,
Krzysztof