1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __DRM_OF_H__ 3 #define __DRM_OF_H__ 4 5 #include <linux/of_graph.h> 6 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE) 7 #include <drm/drm_bridge.h> 8 #endif 9 10 struct component_master_ops; 11 struct component_match; 12 struct device; 13 struct drm_device; 14 struct drm_encoder; 15 struct drm_panel; 16 struct drm_bridge; 17 struct device_node; 18 19 #ifdef CONFIG_OF 20 uint32_t drm_of_crtc_port_mask(struct drm_device *dev, 21 struct device_node *port); 22 uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, 23 struct device_node *port); 24 void drm_of_component_match_add(struct device *master, 25 struct component_match **matchptr, 26 int (*compare)(struct device *, void *), 27 struct device_node *node); 28 int drm_of_component_probe(struct device *dev, 29 int (*compare_of)(struct device *, void *), 30 const struct component_master_ops *m_ops); 31 int drm_of_encoder_active_endpoint(struct device_node *node, 32 struct drm_encoder *encoder, 33 struct of_endpoint *endpoint); 34 int drm_of_find_panel_or_bridge(const struct device_node *np, 35 int port, int endpoint, 36 struct drm_panel **panel, 37 struct drm_bridge **bridge); 38 #else 39 static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev, 40 struct device_node *port) 41 { 42 return 0; 43 } 44 45 static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, 46 struct device_node *port) 47 { 48 return 0; 49 } 50 51 static inline void 52 drm_of_component_match_add(struct device *master, 53 struct component_match **matchptr, 54 int (*compare)(struct device *, void *), 55 struct device_node *node) 56 { 57 } 58 59 static inline int 60 drm_of_component_probe(struct device *dev, 61 int (*compare_of)(struct device *, void *), 62 const struct component_master_ops *m_ops) 63 { 64 return -EINVAL; 65 } 66 67 static inline int drm_of_encoder_active_endpoint(struct device_node *node, 68 struct drm_encoder *encoder, 69 struct of_endpoint *endpoint) 70 { 71 return -EINVAL; 72 } 73 static inline int drm_of_find_panel_or_bridge(const struct device_node *np, 74 int port, int endpoint, 75 struct drm_panel **panel, 76 struct drm_bridge **bridge) 77 { 78 return -EINVAL; 79 } 80 #endif 81 82 /* 83 * drm_of_panel_bridge_remove - remove panel bridge 84 * @np: device tree node containing panel bridge output ports 85 * 86 * Remove the panel bridge of a given DT node's port and endpoint number 87 * 88 * Returns zero if successful, or one of the standard error codes if it fails. 89 */ 90 static inline int drm_of_panel_bridge_remove(const struct device_node *np, 91 int port, int endpoint) 92 { 93 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE) 94 struct drm_bridge *bridge; 95 struct device_node *remote; 96 97 remote = of_graph_get_remote_node(np, port, endpoint); 98 if (!remote) 99 return -ENODEV; 100 101 bridge = of_drm_find_bridge(remote); 102 drm_panel_bridge_remove(bridge); 103 104 return 0; 105 #else 106 return -EINVAL; 107 #endif 108 } 109 110 static inline int drm_of_encoder_active_endpoint_id(struct device_node *node, 111 struct drm_encoder *encoder) 112 { 113 struct of_endpoint endpoint; 114 int ret = drm_of_encoder_active_endpoint(node, encoder, 115 &endpoint); 116 117 return ret ?: endpoint.id; 118 } 119 120 static inline int drm_of_encoder_active_port_id(struct device_node *node, 121 struct drm_encoder *encoder) 122 { 123 struct of_endpoint endpoint; 124 int ret = drm_of_encoder_active_endpoint(node, encoder, 125 &endpoint); 126 127 return ret ?: endpoint.port; 128 } 129 130 #endif /* __DRM_OF_H__ */ 131