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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#ifdef CONFIG_OF
20uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
21 struct device_node *port);
22uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
23 struct device_node *port);
24void drm_of_component_match_add(struct device *master,
25 struct component_match **matchptr,
26 int (*compare)(struct device *, void *),
27 struct device_node *node);
28int drm_of_component_probe(struct device *dev,
29 int (*compare_of)(struct device *, void *),
30 const struct component_master_ops *m_ops);
31int drm_of_encoder_active_endpoint(struct device_node *node,
32 struct drm_encoder *encoder,
33 struct of_endpoint *endpoint);
34int 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
39static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
40 struct device_node *port)
41{
42 return 0;
43}
44
45static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
46 struct device_node *port)
47{
48 return 0;
49}
50
51static inline void
52drm_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
59static inline int
60drm_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
67static 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}
73static 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 */
90static 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
110static 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
120static 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__ */