Re: [PATCH 2/6] drm/bridge: synopsys: Add DW DPTX Controller support library

[FUKAUMI Naoki]

Hi Andy,

On 2/23/25 20:30, Andy Yan wrote:
(snip)
> +struct dw_dp *dw_dp_bind(struct device *dev, struct drm_encoder *encoder,
> +			 const struct dw_dp_plat_data *plat_data)
> +{
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct dw_dp *dp;
> +	struct drm_bridge *bridge;
> +	void __iomem *res;
> +	int ret;
> +
> +	dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
> +	if (!dp)
> +		return ERR_PTR(-ENOMEM);
> +
> +	dp->dev = dev;
> +	dp->video.pixel_mode = DW_DP_MP_QUAD_PIXEL;
> +
> +	dp->plat_data = plat_data;
> +	bridge = &dp->bridge;
> +	mutex_init(&dp->irq_lock);
> +	INIT_WORK(&dp->hpd_work, dw_dp_hpd_work);
> +	init_completion(&dp->complete);
> +
> +	res = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(res))
> +		return ERR_CAST(res);
> +
> +	dp->regmap = devm_regmap_init_mmio(dev, res, &dw_dp_regmap_config);
> +	if (IS_ERR(dp->regmap)) {
> +		dev_err_probe(dev, PTR_ERR(dp->regmap), "failed to create regmap\n");
> +		return ERR_CAST(dp->regmap);
> +	}
> +
> +	dp->phy = devm_of_phy_get(dev, dev->of_node, NULL);
> +	if (IS_ERR(dp->phy)) {
> +		dev_err_probe(dev, PTR_ERR(dp->phy), "failed to get phy\n");
> +		return ERR_CAST(dp->phy);
> +	}
> +
> +	dp->apb_clk = devm_clk_get_enabled(dev, "apb");
> +	if (IS_ERR(dp->apb_clk)) {
> +		dev_err_probe(dev, PTR_ERR(dp->apb_clk), "failed to get apb clock\n");
> +		return ERR_CAST(dp->apb_clk);
> +	}
> +
> +	dp->aux_clk = devm_clk_get_enabled(dev, "aux");
> +	if (IS_ERR(dp->aux_clk)) {
> +		dev_err_probe(dev, PTR_ERR(dp->aux_clk), "failed to get aux clock\n");
> +		return ERR_CAST(dp->aux_clk);
> +	}
> +
> +	dp->i2s_clk = devm_clk_get(dev, "i2s");
> +	if (IS_ERR(dp->i2s_clk)) {
> +		dev_err_probe(dev, PTR_ERR(dp->i2s_clk), "failed to get i2s clock\n");
> +		return ERR_CAST(dp->i2s_clk);
> +	}
> +
> +	dp->spdif_clk = devm_clk_get(dev, "spdif");
> +	if (IS_ERR(dp->spdif_clk)) {
> +		dev_err_probe(dev, PTR_ERR(dp->spdif_clk), "failed to get spdif clock\n");
> +		return ERR_CAST(dp->spdif_clk);
> +	}
> +
> +	dp->hdcp_clk = devm_clk_get(dev, "hdcp");
> +	if (IS_ERR(dp->hdcp_clk)) {
> +		dev_err_probe(dev, PTR_ERR(dp->hdcp_clk), "failed to get hdcp clock\n");
> +		return ERR_CAST(dp->hdcp_clk);
> +	}
> +
> +	dp->rstc = devm_reset_control_get(dev, NULL);
> +	if (IS_ERR(dp->rstc)) {
> +		dev_err_probe(dev, PTR_ERR(dp->rstc), "failed to get reset control\n");
> +		return ERR_CAST(dp->rstc);
> +	}
> +
> +	dp->irq = platform_get_irq(pdev, 0);
> +	if (dp->irq < 0)
> +		return ERR_PTR(ret);
> +
> +	ret = devm_request_threaded_irq(dev, dp->irq, NULL, dw_dp_irq,
> +					IRQF_ONESHOT, dev_name(dev), dp);
> +	if (ret) {
> +		dev_err_probe(dev, ret, "failed to request irq\n");
> +		return ERR_PTR(ret);
> +	}
> +
> +	bridge->of_node = dev->of_node;
> +	bridge->funcs = &dw_dp_bridge_funcs;
> +	bridge->ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> +	bridge->type = DRM_MODE_CONNECTOR_DisplayPort;
> +	bridge->ycbcr_420_allowed = true;
> +	bridge->vendor = "Synopsys";
> +	bridge->product = "DW DP TX";
> +
> +	platform_set_drvdata(pdev, dp);
> +
> +	dp->aux.dev = dev;
> +	dp->aux.drm_dev = encoder->dev;
> +	dp->aux.name = dev_name(dev);
> +	dp->aux.transfer = dw_dp_aux_transfer;
> +	ret = drm_dp_aux_register(&dp->aux);
> +	if (ret) {
> +		dev_err_probe(dev, ret, "Aux register failed\n");
> +		return ERR_PTR(ret);
> +	}
> +
> +	ret = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
> +	if (ret)
> +		dev_err_probe(dev, ret, "Failed to attach bridge\n");
> +
> +	dw_dp_init_hw(dp);
> +
> +	return dp;
> +}

EXPORT_SYMBOL_GPL(dw_dp_bind);

is required to build it as a module.

Best regards,

--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.