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 /** 20 * enum drm_lvds_dual_link_pixels - Pixel order of an LVDS dual-link connection 21 * @DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS: Even pixels are expected to be generated 22 * from the first port, odd pixels from the second port 23 * @DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS: Odd pixels are expected to be generated 24 * from the first port, even pixels from the second port 25 */ 26 enum drm_lvds_dual_link_pixels { 27 DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS = 0, 28 DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS = 1, 29 }; 30 31 #ifdef CONFIG_OF 32 uint32_t drm_of_crtc_port_mask(struct drm_device *dev, 33 struct device_node *port); 34 uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, 35 struct device_node *port); 36 void drm_of_component_match_add(struct device *master, 37 struct component_match **matchptr, 38 int (*compare)(struct device *, void *), 39 struct device_node *node); 40 int drm_of_component_probe(struct device *dev, 41 int (*compare_of)(struct device *, void *), 42 const struct component_master_ops *m_ops); 43 int drm_of_encoder_active_endpoint(struct device_node *node, 44 struct drm_encoder *encoder, 45 struct of_endpoint *endpoint); 46 int drm_of_find_panel_or_bridge(const struct device_node *np, 47 int port, int endpoint, 48 struct drm_panel **panel, 49 struct drm_bridge **bridge); 50 int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, 51 const struct device_node *port2); 52 int drm_of_lvds_get_data_mapping(const struct device_node *port); 53 #else 54 static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev, 55 struct device_node *port) 56 { 57 return 0; 58 } 59 60 static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, 61 struct device_node *port) 62 { 63 return 0; 64 } 65 66 static inline void 67 drm_of_component_match_add(struct device *master, 68 struct component_match **matchptr, 69 int (*compare)(struct device *, void *), 70 struct device_node *node) 71 { 72 } 73 74 static inline int 75 drm_of_component_probe(struct device *dev, 76 int (*compare_of)(struct device *, void *), 77 const struct component_master_ops *m_ops) 78 { 79 return -EINVAL; 80 } 81 82 static inline int drm_of_encoder_active_endpoint(struct device_node *node, 83 struct drm_encoder *encoder, 84 struct of_endpoint *endpoint) 85 { 86 return -EINVAL; 87 } 88 static inline int drm_of_find_panel_or_bridge(const struct device_node *np, 89 int port, int endpoint, 90 struct drm_panel **panel, 91 struct drm_bridge **bridge) 92 { 93 return -EINVAL; 94 } 95 96 static inline int 97 drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, 98 const struct device_node *port2) 99 { 100 return -EINVAL; 101 } 102 103 static inline int 104 drm_of_lvds_get_data_mapping(const struct device_node *port) 105 { 106 return -EINVAL; 107 } 108 #endif 109 110 /* 111 * drm_of_panel_bridge_remove - remove panel bridge 112 * @np: device tree node containing panel bridge output ports 113 * 114 * Remove the panel bridge of a given DT node's port and endpoint number 115 * 116 * Returns zero if successful, or one of the standard error codes if it fails. 117 */ 118 static inline int drm_of_panel_bridge_remove(const struct device_node *np, 119 int port, int endpoint) 120 { 121 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE) 122 struct drm_bridge *bridge; 123 struct device_node *remote; 124 125 remote = of_graph_get_remote_node(np, port, endpoint); 126 if (!remote) 127 return -ENODEV; 128 129 bridge = of_drm_find_bridge(remote); 130 drm_panel_bridge_remove(bridge); 131 132 return 0; 133 #else 134 return -EINVAL; 135 #endif 136 } 137 138 static inline int drm_of_encoder_active_endpoint_id(struct device_node *node, 139 struct drm_encoder *encoder) 140 { 141 struct of_endpoint endpoint; 142 int ret = drm_of_encoder_active_endpoint(node, encoder, 143 &endpoint); 144 145 return ret ?: endpoint.id; 146 } 147 148 static inline int drm_of_encoder_active_port_id(struct device_node *node, 149 struct drm_encoder *encoder) 150 { 151 struct of_endpoint endpoint; 152 int ret = drm_of_encoder_active_endpoint(node, encoder, 153 &endpoint); 154 155 return ret ?: endpoint.port; 156 } 157 158 #endif /* __DRM_OF_H__ */ 159