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