sys/dev/drm/include/drm/drm_of.h

   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 device;
   8 struct drm_device;
   9 struct drm_encoder;
  10 struct device_node;
  11
  12 #ifdef CONFIG_OF
  13 extern uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
  14                                            struct device_node *port);
  15 extern int drm_of_component_probe(struct device *dev,
  16                                   int (*compare_of)(struct device *, void *),
  17                                   const struct component_master_ops *m_ops);
  18 extern int drm_of_encoder_active_endpoint(struct device_node *node,
  19                                           struct drm_encoder *encoder,
  20                                           struct of_endpoint *endpoint);
  21 #else
  22 static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
  23                                                   struct device_node *port)
  24 {
  25         return 0;
  26 }
  27
  28 static inline int
  29 drm_of_component_probe(struct device *dev,
  30                        int (*compare_of)(struct device *, void *),
  31                        const struct component_master_ops *m_ops)
  32 {
  33         return -EINVAL;
  34 }
  35
  36 static inline int drm_of_encoder_active_endpoint(struct device_node *node,
  37                                                  struct drm_encoder *encoder,
  38                                                  struct of_endpoint *endpoint)
  39 {
  40         return -EINVAL;
  41 }
  42 #endif
  43
  44 static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,
  45                                                     struct drm_encoder *encoder)
  46 {
  47         struct of_endpoint endpoint;
  48         int ret = drm_of_encoder_active_endpoint(node, encoder,
  49                                                  &endpoint);
  50
  51         return ret ?: endpoint.id;
  52 }
  53
  54 static inline int drm_of_encoder_active_port_id(struct device_node *node,
  55                                                 struct drm_encoder *encoder)
  56 {
  57         struct of_endpoint endpoint;
  58         int ret = drm_of_encoder_active_endpoint(node, encoder,
  59                                                  &endpoint);
  60
  61         return ret ?: endpoint.port;
  62 }
  63
  64 #endif /* __DRM_OF_H__ */