xref: /openbmc/linux/include/drm/drm_of.h (revision 1c2dd16a)
1 #ifndef __DRM_OF_H__
2 #define __DRM_OF_H__
3 
4 #include <linux/of_graph.h>
5 
6 struct component_master_ops;
7 struct component_match;
8 struct device;
9 struct drm_device;
10 struct drm_encoder;
11 struct device_node;
12 
13 #ifdef CONFIG_OF
14 extern uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
15 					   struct device_node *port);
16 extern void drm_of_component_match_add(struct device *master,
17 				       struct component_match **matchptr,
18 				       int (*compare)(struct device *, void *),
19 				       struct device_node *node);
20 extern int drm_of_component_probe(struct device *dev,
21 				  int (*compare_of)(struct device *, void *),
22 				  const struct component_master_ops *m_ops);
23 extern int drm_of_encoder_active_endpoint(struct device_node *node,
24 					  struct drm_encoder *encoder,
25 					  struct of_endpoint *endpoint);
26 #else
27 static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
28 						  struct device_node *port)
29 {
30 	return 0;
31 }
32 
33 static inline void
34 drm_of_component_match_add(struct device *master,
35 			   struct component_match **matchptr,
36 			   int (*compare)(struct device *, void *),
37 			   struct device_node *node)
38 {
39 }
40 
41 static inline int
42 drm_of_component_probe(struct device *dev,
43 		       int (*compare_of)(struct device *, void *),
44 		       const struct component_master_ops *m_ops)
45 {
46 	return -EINVAL;
47 }
48 
49 static inline int drm_of_encoder_active_endpoint(struct device_node *node,
50 						 struct drm_encoder *encoder,
51 						 struct of_endpoint *endpoint)
52 {
53 	return -EINVAL;
54 }
55 #endif
56 
57 static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,
58 						    struct drm_encoder *encoder)
59 {
60 	struct of_endpoint endpoint;
61 	int ret = drm_of_encoder_active_endpoint(node, encoder,
62 						 &endpoint);
63 
64 	return ret ?: endpoint.id;
65 }
66 
67 static inline int drm_of_encoder_active_port_id(struct device_node *node,
68 						struct drm_encoder *encoder)
69 {
70 	struct of_endpoint endpoint;
71 	int ret = drm_of_encoder_active_endpoint(node, encoder,
72 						 &endpoint);
73 
74 	return ret ?: endpoint.port;
75 }
76 
77 #endif /* __DRM_OF_H__ */
78