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[J-linux.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/err.h>
6 #include <linux/of_graph.h>
7 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)
8 #include <drm/drm_bridge.h>
9 #endif
10
11 struct component_master_ops;
12 struct component_match;
13 struct device;
14 struct drm_device;
15 struct drm_encoder;
16 struct drm_panel;
17 struct drm_bridge;
18 struct device_node;
19 struct mipi_dsi_device_info;
20 struct mipi_dsi_host;
21
22 /**
23  * enum drm_lvds_dual_link_pixels - Pixel order of an LVDS dual-link connection
24  * @DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS: Even pixels are expected to be generated
25  *    from the first port, odd pixels from the second port
26  * @DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS: Odd pixels are expected to be generated
27  *    from the first port, even pixels from the second port
28  */
29 enum drm_lvds_dual_link_pixels {
30         DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS = 0,
31         DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS = 1,
32 };
33
34 #ifdef CONFIG_OF
35 uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
36                             struct device_node *port);
37 uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
38                                     struct device_node *port);
39 void drm_of_component_match_add(struct device *master,
40                                 struct component_match **matchptr,
41                                 int (*compare)(struct device *, void *),
42                                 struct device_node *node);
43 int drm_of_component_probe(struct device *dev,
44                            int (*compare_of)(struct device *, void *),
45                            const struct component_master_ops *m_ops);
46 int drm_of_encoder_active_endpoint(struct device_node *node,
47                                    struct drm_encoder *encoder,
48                                    struct of_endpoint *endpoint);
49 int drm_of_find_panel_or_bridge(const struct device_node *np,
50                                 int port, int endpoint,
51                                 struct drm_panel **panel,
52                                 struct drm_bridge **bridge);
53 int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
54                                           const struct device_node *port2);
55 int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1,
56                                                struct device_node *port2);
57 int drm_of_lvds_get_data_mapping(const struct device_node *port);
58 int drm_of_get_data_lanes_count(const struct device_node *endpoint,
59                                 const unsigned int min, const unsigned int max);
60 int drm_of_get_data_lanes_count_ep(const struct device_node *port,
61                                    int port_reg, int reg,
62                                    const unsigned int min,
63                                    const unsigned int max);
64 #else
65 static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
66                                           struct device_node *port)
67 {
68         return 0;
69 }
70
71 static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
72                                                   struct device_node *port)
73 {
74         return 0;
75 }
76
77 static inline void
78 drm_of_component_match_add(struct device *master,
79                            struct component_match **matchptr,
80                            int (*compare)(struct device *, void *),
81                            struct device_node *node)
82 {
83 }
84
85 static inline int
86 drm_of_component_probe(struct device *dev,
87                        int (*compare_of)(struct device *, void *),
88                        const struct component_master_ops *m_ops)
89 {
90         return -EINVAL;
91 }
92
93 static inline int drm_of_encoder_active_endpoint(struct device_node *node,
94                                                  struct drm_encoder *encoder,
95                                                  struct of_endpoint *endpoint)
96 {
97         return -EINVAL;
98 }
99 static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
100                                               int port, int endpoint,
101                                               struct drm_panel **panel,
102                                               struct drm_bridge **bridge)
103 {
104         return -EINVAL;
105 }
106
107 static inline int
108 drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
109                                       const struct device_node *port2)
110 {
111         return -EINVAL;
112 }
113
114 static inline int
115 drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1,
116                                            struct device_node *port2)
117 {
118         return -EINVAL;
119 }
120
121 static inline int
122 drm_of_lvds_get_data_mapping(const struct device_node *port)
123 {
124         return -EINVAL;
125 }
126
127 static inline int
128 drm_of_get_data_lanes_count(const struct device_node *endpoint,
129                             const unsigned int min, const unsigned int max)
130 {
131         return -EINVAL;
132 }
133
134 static inline int
135 drm_of_get_data_lanes_count_ep(const struct device_node *port,
136                                int port_reg, int reg,
137                                const unsigned int min,
138                                const unsigned int max)
139 {
140         return -EINVAL;
141 }
142 #endif
143
144 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_MIPI_DSI)
145 struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev);
146 #else
147 static inline struct
148 mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev)
149 {
150         return ERR_PTR(-EINVAL);
151 }
152 #endif /* CONFIG_OF && CONFIG_DRM_MIPI_DSI */
153
154 /*
155  * drm_of_panel_bridge_remove - remove panel bridge
156  * @np: device tree node containing panel bridge output ports
157  *
158  * Remove the panel bridge of a given DT node's port and endpoint number
159  *
160  * Returns zero if successful, or one of the standard error codes if it fails.
161  */
162 static inline int drm_of_panel_bridge_remove(const struct device_node *np,
163                                              int port, int endpoint)
164 {
165 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)
166         struct drm_bridge *bridge;
167         struct device_node *remote;
168
169         remote = of_graph_get_remote_node(np, port, endpoint);
170         if (!remote)
171                 return -ENODEV;
172
173         bridge = of_drm_find_bridge(remote);
174         drm_panel_bridge_remove(bridge);
175
176         return 0;
177 #else
178         return -EINVAL;
179 #endif
180 }
181
182 static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,
183                                                     struct drm_encoder *encoder)
184 {
185         struct of_endpoint endpoint;
186         int ret = drm_of_encoder_active_endpoint(node, encoder,
187                                                  &endpoint);
188
189         return ret ?: endpoint.id;
190 }
191
192 static inline int drm_of_encoder_active_port_id(struct device_node *node,
193                                                 struct drm_encoder *encoder)
194 {
195         struct of_endpoint endpoint;
196         int ret = drm_of_encoder_active_endpoint(node, encoder,
197                                                  &endpoint);
198
199         return ret ?: endpoint.port;
200 }
201
202 #endif /* __DRM_OF_H__ */
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