include/drm/drm_of.h

   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__ */