1 // SPDX-License-Identifier: GPL-2.0-only
60 	struct drm_bridge bridge;  member
64 static inline struct mchp_lvds *bridge_to_lvds(struct drm_bridge *bridge)  in bridge_to_lvds()  argument
66 	return container_of(bridge, struct mchp_lvds, bridge);  in bridge_to_lvds()
71 	return readl_relaxed(lvds->regs + offset);  in lvds_readl()
76 	writel_relaxed(val, lvds->regs + offset);  in lvds_writel()
90 			dev_err(lvds->dev, "%s: timeout error\n", __func__);  in lvds_serialiser_on()
102 	/* Enable the LVDS serializer */  in lvds_serialiser_on()
106 static int mchp_lvds_attach(struct drm_bridge *bridge,  in mchp_lvds_attach()  argument
109 	struct mchp_lvds *lvds = bridge_to_lvds(bridge);  in mchp_lvds_attach()
111 	return drm_bridge_attach(bridge->encoder, lvds->panel_bridge,  in mchp_lvds_attach()
112 				 bridge, flags);  in mchp_lvds_attach()
115 static void mchp_lvds_enable(struct drm_bridge *bridge)  in mchp_lvds_enable()  argument
117 	struct mchp_lvds *lvds = bridge_to_lvds(bridge);  in mchp_lvds_enable()
120 	ret = clk_prepare_enable(lvds->pclk);  in mchp_lvds_enable()
122 		dev_err(lvds->dev, "failed to enable lvds pclk %d\n", ret);  in mchp_lvds_enable()
126 	ret = pm_runtime_get_sync(lvds->dev);  in mchp_lvds_enable()
128 		dev_err(lvds->dev, "failed to get pm runtime: %d\n", ret);  in mchp_lvds_enable()
135 static void mchp_lvds_disable(struct drm_bridge *bridge)  in mchp_lvds_disable()  argument
137 	struct mchp_lvds *lvds = bridge_to_lvds(bridge);  in mchp_lvds_disable()
139 	pm_runtime_put(lvds->dev);  in mchp_lvds_disable()
140 	clk_disable_unprepare(lvds->pclk);  in mchp_lvds_disable()
145 	.enable = mchp_lvds_enable,
151 	struct device *dev = &pdev->dev;  in mchp_lvds_probe()
156 	if (!dev->of_node)  in mchp_lvds_probe()
157 		return -ENODEV;  in mchp_lvds_probe()
159 	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);  in mchp_lvds_probe()
161 		return -ENOMEM;  in mchp_lvds_probe()
163 	lvds->dev = dev;  in mchp_lvds_probe()
165 	lvds->regs = devm_platform_ioremap_resource(pdev, 0);  in mchp_lvds_probe()
166 	if (IS_ERR(lvds->regs))  in mchp_lvds_probe()
167 		return PTR_ERR(lvds->regs);  in mchp_lvds_probe()
169 	lvds->pclk = devm_clk_get(lvds->dev, "pclk");  in mchp_lvds_probe()
170 	if (IS_ERR(lvds->pclk))  in mchp_lvds_probe()
171 		return dev_err_probe(lvds->dev, PTR_ERR(lvds->pclk),  in mchp_lvds_probe()
174 	port = of_graph_get_remote_node(dev->of_node, 1, 0);  in mchp_lvds_probe()
178 		return -ENODEV;  in mchp_lvds_probe()
181 	lvds->panel = of_drm_find_panel(port);  in mchp_lvds_probe()
184 	if (IS_ERR(lvds->panel))  in mchp_lvds_probe()
185 		return -EPROBE_DEFER;  in mchp_lvds_probe()
187 	lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);  in mchp_lvds_probe()
189 	if (IS_ERR(lvds->panel_bridge))  in mchp_lvds_probe()
190 		return PTR_ERR(lvds->panel_bridge);  in mchp_lvds_probe()
192 	lvds->bridge.of_node = dev->of_node;  in mchp_lvds_probe()
193 	lvds->bridge.type = DRM_MODE_CONNECTOR_LVDS;  in mchp_lvds_probe()
194 	lvds->bridge.funcs = &mchp_lvds_bridge_funcs;  in mchp_lvds_probe()
199 		dev_err(lvds->dev, "failed to enable pm runtime: %d\n", ret);  in mchp_lvds_probe()
203 	drm_bridge_add(&lvds->bridge);  in mchp_lvds_probe()
210 		.compatible = "microchip,sam9x75-lvds",
219 		   .name = "microchip-lvds",