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
drm_of_crtc_port_mask(struct drm_device * dev,struct device_node * port)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 
drm_of_find_possible_crtcs(struct drm_device * dev,struct device_node * port)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
drm_of_component_match_add(struct device * master,struct component_match ** matchptr,int (* compare)(struct device *,void *),struct device_node * node)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
drm_of_component_probe(struct device * dev,int (* compare_of)(struct device *,void *),const struct component_master_ops * m_ops)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 
drm_of_encoder_active_endpoint(struct device_node * node,struct drm_encoder * encoder,struct of_endpoint * endpoint)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 }
drm_of_find_panel_or_bridge(const struct device_node * np,int port,int endpoint,struct drm_panel ** panel,struct drm_bridge ** bridge)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  */
drm_of_panel_bridge_remove(const struct device_node * np,int port,int endpoint)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 
drm_of_encoder_active_endpoint_id(struct device_node * node,struct drm_encoder * encoder)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 
drm_of_encoder_active_port_id(struct device_node * node,struct drm_encoder * encoder)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