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 | |
13 | struct drm_dp_aux; |
14 | |
15 | struct drm_device; |
16 | |
17 | struct drm_atomic_state; |
18 | struct drm_dp_tunnel_mgr; |
19 | struct drm_dp_tunnel_state; |
20 | |
21 | struct ref_tracker; |
22 | |
23 | struct 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 | |
30 | struct drm_dp_tunnel * |
31 | drm_dp_tunnel_get(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker); |
32 | |
33 | void |
34 | drm_dp_tunnel_put(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker); |
35 | |
36 | static 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 | |
42 | static 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 | |
48 | struct drm_dp_tunnel * |
49 | drm_dp_tunnel_detect(struct drm_dp_tunnel_mgr *mgr, |
50 | struct drm_dp_aux *aux); |
51 | int drm_dp_tunnel_destroy(struct drm_dp_tunnel *tunnel); |
52 | |
53 | int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel); |
54 | int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel); |
55 | bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel *tunnel); |
56 | int drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw); |
57 | int drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel); |
58 | int drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel); |
59 | |
60 | void drm_dp_tunnel_set_io_error(struct drm_dp_tunnel *tunnel); |
61 | |
62 | int drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr *mgr, |
63 | struct drm_dp_aux *aux); |
64 | |
65 | int drm_dp_tunnel_max_dprx_rate(const struct drm_dp_tunnel *tunnel); |
66 | int drm_dp_tunnel_max_dprx_lane_count(const struct drm_dp_tunnel *tunnel); |
67 | int drm_dp_tunnel_available_bw(const struct drm_dp_tunnel *tunnel); |
68 | |
69 | const char *drm_dp_tunnel_name(const struct drm_dp_tunnel *tunnel); |
70 | |
71 | struct drm_dp_tunnel_state * |
72 | drm_dp_tunnel_atomic_get_state(struct drm_atomic_state *state, |
73 | struct drm_dp_tunnel *tunnel); |
74 | |
75 | struct drm_dp_tunnel_state * |
76 | drm_dp_tunnel_atomic_get_old_state(struct drm_atomic_state *state, |
77 | const struct drm_dp_tunnel *tunnel); |
78 | |
79 | struct drm_dp_tunnel_state * |
80 | drm_dp_tunnel_atomic_get_new_state(struct drm_atomic_state *state, |
81 | const struct drm_dp_tunnel *tunnel); |
82 | |
83 | int drm_dp_tunnel_atomic_set_stream_bw(struct drm_atomic_state *state, |
84 | struct drm_dp_tunnel *tunnel, |
85 | u8 stream_id, int bw); |
86 | int 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 | |
90 | int drm_dp_tunnel_atomic_check_stream_bws(struct drm_atomic_state *state, |
91 | u32 *failed_stream_mask); |
92 | |
93 | int drm_dp_tunnel_atomic_get_required_bw(const struct drm_dp_tunnel_state *tunnel_state); |
94 | |
95 | struct drm_dp_tunnel_mgr * |
96 | drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count); |
97 | void drm_dp_tunnel_mgr_destroy(struct drm_dp_tunnel_mgr *mgr); |
98 | |
99 | #else |
100 | |
101 | static inline struct drm_dp_tunnel * |
102 | drm_dp_tunnel_get(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker) |
103 | { |
104 | return NULL; |
105 | } |
106 | |
107 | static inline void |
108 | drm_dp_tunnel_put(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker) {} |
109 | |
110 | static inline void drm_dp_tunnel_ref_get(struct drm_dp_tunnel *tunnel, |
111 | struct drm_dp_tunnel_ref *tunnel_ref) {} |
112 | |
113 | static inline void drm_dp_tunnel_ref_put(struct drm_dp_tunnel_ref *tunnel_ref) {} |
114 | |
115 | static inline struct drm_dp_tunnel * |
116 | drm_dp_tunnel_detect(struct drm_dp_tunnel_mgr *mgr, |
117 | struct drm_dp_aux *aux) |
118 | { |
119 | return ERR_PTR(-EOPNOTSUPP); |
120 | } |
121 | |
122 | static inline int |
123 | drm_dp_tunnel_destroy(struct drm_dp_tunnel *tunnel) |
124 | { |
125 | return 0; |
126 | } |
127 | |
128 | static inline int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel) |
129 | { |
130 | return -EOPNOTSUPP; |
131 | } |
132 | |
133 | static inline int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel) |
134 | { |
135 | return -EOPNOTSUPP; |
136 | } |
137 | |
138 | static inline bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel *tunnel) |
139 | { |
140 | return false; |
141 | } |
142 | |
143 | static inline int |
144 | drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw) |
145 | { |
146 | return -EOPNOTSUPP; |
147 | } |
148 | |
149 | static inline int |
150 | drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel) |
151 | { |
152 | return -1; |
153 | } |
154 | |
155 | static inline int |
156 | drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel) |
157 | { |
158 | return -EOPNOTSUPP; |
159 | } |
160 | |
161 | static inline void drm_dp_tunnel_set_io_error(struct drm_dp_tunnel *tunnel) {} |
162 | |
163 | static inline int |
164 | drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr *mgr, |
165 | struct drm_dp_aux *aux) |
166 | { |
167 | return -EOPNOTSUPP; |
168 | } |
169 | |
170 | static inline int |
171 | drm_dp_tunnel_max_dprx_rate(const struct drm_dp_tunnel *tunnel) |
172 | { |
173 | return 0; |
174 | } |
175 | |
176 | static inline int |
177 | drm_dp_tunnel_max_dprx_lane_count(const struct drm_dp_tunnel *tunnel) |
178 | { |
179 | return 0; |
180 | } |
181 | |
182 | static inline int |
183 | drm_dp_tunnel_available_bw(const struct drm_dp_tunnel *tunnel) |
184 | { |
185 | return -1; |
186 | } |
187 | |
188 | static inline const char * |
189 | drm_dp_tunnel_name(const struct drm_dp_tunnel *tunnel) |
190 | { |
191 | return NULL; |
192 | } |
193 | |
194 | static inline struct drm_dp_tunnel_state * |
195 | drm_dp_tunnel_atomic_get_state(struct drm_atomic_state *state, |
196 | struct drm_dp_tunnel *tunnel) |
197 | { |
198 | return ERR_PTR(-EOPNOTSUPP); |
199 | } |
200 | |
201 | static inline struct drm_dp_tunnel_state * |
202 | drm_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 | |
208 | static inline int |
209 | drm_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 | |
216 | static inline int |
217 | drm_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 | |
224 | static inline int |
225 | drm_dp_tunnel_atomic_check_stream_bws(struct drm_atomic_state *state, |
226 | u32 *failed_stream_mask) |
227 | { |
228 | return -EOPNOTSUPP; |
229 | } |
230 | |
231 | static inline int |
232 | drm_dp_tunnel_atomic_get_required_bw(const struct drm_dp_tunnel_state *tunnel_state) |
233 | { |
234 | return 0; |
235 | } |
236 | |
237 | static inline struct drm_dp_tunnel_mgr * |
238 | drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count) |
239 | { |
240 | return ERR_PTR(-EOPNOTSUPP); |
241 | } |
242 | |
243 | static inline |
244 | void 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 | |