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