GNU Linux-libre 4.19.211-gnu1
[releases.git] / 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__ */