1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#ifndef __DRM_DP_TUNNEL_H__
7#define __DRM_DP_TUNNEL_H__
8
9#include <linux/err.h>
10#include <linux/errno.h>
11#include <linux/types.h>
12
13struct drm_dp_aux;
14
15struct drm_device;
16
17struct drm_atomic_state;
18struct drm_dp_tunnel_mgr;
19struct drm_dp_tunnel_state;
20
21struct ref_tracker;
22
23struct drm_dp_tunnel_ref {
24 struct drm_dp_tunnel *tunnel;
25 struct ref_tracker *tracker;
26};
27
28#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL
29
30struct drm_dp_tunnel *
31drm_dp_tunnel_get(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker);
32
33void
34drm_dp_tunnel_put(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker);
35
36static inline void drm_dp_tunnel_ref_get(struct drm_dp_tunnel *tunnel,
37 struct drm_dp_tunnel_ref *tunnel_ref)
38{
39 tunnel_ref->tunnel = drm_dp_tunnel_get(tunnel, tracker: &tunnel_ref->tracker);
40}
41
42static inline void drm_dp_tunnel_ref_put(struct drm_dp_tunnel_ref *tunnel_ref)
43{
44 drm_dp_tunnel_put(tunnel: tunnel_ref->tunnel, tracker: &tunnel_ref->tracker);
45 tunnel_ref->tunnel = NULL;
46}
47
48struct drm_dp_tunnel *
49drm_dp_tunnel_detect(struct drm_dp_tunnel_mgr *mgr,
50 struct drm_dp_aux *aux);
51int drm_dp_tunnel_destroy(struct drm_dp_tunnel *tunnel);
52
53int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel);
54int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel);
55bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel *tunnel);
56int drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw);
57int drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel);
58int drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel);
59
60void drm_dp_tunnel_set_io_error(struct drm_dp_tunnel *tunnel);
61
62int drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr *mgr,
63 struct drm_dp_aux *aux);
64
65int drm_dp_tunnel_max_dprx_rate(const struct drm_dp_tunnel *tunnel);
66int drm_dp_tunnel_max_dprx_lane_count(const struct drm_dp_tunnel *tunnel);
67int drm_dp_tunnel_available_bw(const struct drm_dp_tunnel *tunnel);
68
69const char *drm_dp_tunnel_name(const struct drm_dp_tunnel *tunnel);
70
71struct drm_dp_tunnel_state *
72drm_dp_tunnel_atomic_get_state(struct drm_atomic_state *state,
73 struct drm_dp_tunnel *tunnel);
74
75struct drm_dp_tunnel_state *
76drm_dp_tunnel_atomic_get_old_state(struct drm_atomic_state *state,
77 const struct drm_dp_tunnel *tunnel);
78
79struct drm_dp_tunnel_state *
80drm_dp_tunnel_atomic_get_new_state(struct drm_atomic_state *state,
81 const struct drm_dp_tunnel *tunnel);
82
83int drm_dp_tunnel_atomic_set_stream_bw(struct drm_atomic_state *state,
84 struct drm_dp_tunnel *tunnel,
85 u8 stream_id, int bw);
86int drm_dp_tunnel_atomic_get_group_streams_in_state(struct drm_atomic_state *state,
87 const struct drm_dp_tunnel *tunnel,
88 u32 *stream_mask);
89
90int drm_dp_tunnel_atomic_check_stream_bws(struct drm_atomic_state *state,
91 u32 *failed_stream_mask);
92
93int drm_dp_tunnel_atomic_get_required_bw(const struct drm_dp_tunnel_state *tunnel_state);
94
95struct drm_dp_tunnel_mgr *
96drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count);
97void drm_dp_tunnel_mgr_destroy(struct drm_dp_tunnel_mgr *mgr);
98
99#else
100
101static inline struct drm_dp_tunnel *
102drm_dp_tunnel_get(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker)
103{
104 return NULL;
105}
106
107static inline void
108drm_dp_tunnel_put(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker) {}
109
110static inline void drm_dp_tunnel_ref_get(struct drm_dp_tunnel *tunnel,
111 struct drm_dp_tunnel_ref *tunnel_ref) {}
112
113static inline void drm_dp_tunnel_ref_put(struct drm_dp_tunnel_ref *tunnel_ref) {}
114
115static inline struct drm_dp_tunnel *
116drm_dp_tunnel_detect(struct drm_dp_tunnel_mgr *mgr,
117 struct drm_dp_aux *aux)
118{
119 return ERR_PTR(-EOPNOTSUPP);
120}
121
122static inline int
123drm_dp_tunnel_destroy(struct drm_dp_tunnel *tunnel)
124{
125 return 0;
126}
127
128static inline int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel)
129{
130 return -EOPNOTSUPP;
131}
132
133static inline int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel)
134{
135 return -EOPNOTSUPP;
136}
137
138static inline bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel *tunnel)
139{
140 return false;
141}
142
143static inline int
144drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw)
145{
146 return -EOPNOTSUPP;
147}
148
149static inline int
150drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel)
151{
152 return -1;
153}
154
155static inline int
156drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel)
157{
158 return -EOPNOTSUPP;
159}
160
161static inline void drm_dp_tunnel_set_io_error(struct drm_dp_tunnel *tunnel) {}
162
163static inline int
164drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr *mgr,
165 struct drm_dp_aux *aux)
166{
167 return -EOPNOTSUPP;
168}
169
170static inline int
171drm_dp_tunnel_max_dprx_rate(const struct drm_dp_tunnel *tunnel)
172{
173 return 0;
174}
175
176static inline int
177drm_dp_tunnel_max_dprx_lane_count(const struct drm_dp_tunnel *tunnel)
178{
179 return 0;
180}
181
182static inline int
183drm_dp_tunnel_available_bw(const struct drm_dp_tunnel *tunnel)
184{
185 return -1;
186}
187
188static inline const char *
189drm_dp_tunnel_name(const struct drm_dp_tunnel *tunnel)
190{
191 return NULL;
192}
193
194static inline struct drm_dp_tunnel_state *
195drm_dp_tunnel_atomic_get_state(struct drm_atomic_state *state,
196 struct drm_dp_tunnel *tunnel)
197{
198 return ERR_PTR(-EOPNOTSUPP);
199}
200
201static inline struct drm_dp_tunnel_state *
202drm_dp_tunnel_atomic_get_new_state(struct drm_atomic_state *state,
203 const struct drm_dp_tunnel *tunnel)
204{
205 return ERR_PTR(-EOPNOTSUPP);
206}
207
208static inline int
209drm_dp_tunnel_atomic_set_stream_bw(struct drm_atomic_state *state,
210 struct drm_dp_tunnel *tunnel,
211 u8 stream_id, int bw)
212{
213 return -EOPNOTSUPP;
214}
215
216static inline int
217drm_dp_tunnel_atomic_get_group_streams_in_state(struct drm_atomic_state *state,
218 const struct drm_dp_tunnel *tunnel,
219 u32 *stream_mask)
220{
221 return -EOPNOTSUPP;
222}
223
224static inline int
225drm_dp_tunnel_atomic_check_stream_bws(struct drm_atomic_state *state,
226 u32 *failed_stream_mask)
227{
228 return -EOPNOTSUPP;
229}
230
231static inline int
232drm_dp_tunnel_atomic_get_required_bw(const struct drm_dp_tunnel_state *tunnel_state)
233{
234 return 0;
235}
236
237static inline struct drm_dp_tunnel_mgr *
238drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count)
239{
240 return ERR_PTR(-EOPNOTSUPP);
241}
242
243static inline
244void drm_dp_tunnel_mgr_destroy(struct drm_dp_tunnel_mgr *mgr) {}
245
246#endif /* CONFIG_DRM_DISPLAY_DP_TUNNEL */
247
248#endif /* __DRM_DP_TUNNEL_H__ */
249

source code of linux/include/drm/display/drm_dp_tunnel.h