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2fa91d15 JN |
1 | ============================= |
2 | Mode Setting Helper Functions | |
3 | ============================= | |
4 | ||
bcb32b69 DV |
5 | The DRM subsystem aims for a strong separation between core code and helper |
6 | libraries. Core code takes care of general setup and teardown and decoding | |
7 | userspace requests to kernel internal objects. Everything else is handled by a | |
8 | large set of helper libraries, which can be combined freely to pick and choose | |
9 | for each driver what fits, and avoid shared code where special behaviour is | |
10 | needed. | |
11 | ||
12 | This distinction between core code and helpers is especially strong in the | |
13 | modesetting code, where there's a shared userspace ABI for all drivers. This is | |
14 | in contrast to the render side, where pretty much everything (with very few | |
15 | exceptions) can be considered optional helper code. | |
16 | ||
17 | There are a few areas these helpers can grouped into: | |
18 | ||
19 | * Helpers to implement modesetting. The important ones here are the atomic | |
20 | helpers. Old drivers still often use the legacy CRTC helpers. They both share | |
21 | the same set of common helper vtables. For really simple drivers (anything | |
22 | that would have been a great fit in the deprecated fbdev subsystem) there's | |
23 | also the simple display pipe helpers. | |
24 | ||
25 | * There's a big pile of helpers for handling outputs. First the generic bridge | |
26 | helpers for handling encoder and transcoder IP blocks. Second the panel helpers | |
27 | for handling panel-related information and logic. Plus then a big set of | |
28 | helpers for the various sink standards (DisplayPort, HDMI, MIPI DSI). Finally | |
29 | there's also generic helpers for handling output probing, and for dealing with | |
30 | EDIDs. | |
31 | ||
32 | * The last group of helpers concerns itself with the frontend side of a display | |
33 | pipeline: Planes, handling rectangles for visibility checking and scissoring, | |
34 | flip queues and assorted bits. | |
35 | ||
36 | Modeset Helper Reference for Common Vtables | |
37 | =========================================== | |
38 | ||
39 | .. kernel-doc:: include/drm/drm_modeset_helper_vtables.h | |
1ea35768 | 40 | :doc: overview |
bcb32b69 DV |
41 | |
42 | .. kernel-doc:: include/drm/drm_modeset_helper_vtables.h | |
1ea35768 | 43 | :internal: |
2fa91d15 | 44 | |
4a8e2292 DV |
45 | .. _drm_atomic_helper: |
46 | ||
2fa91d15 JN |
47 | Atomic Modeset Helper Functions Reference |
48 | ========================================= | |
49 | ||
50 | Overview | |
51 | -------- | |
52 | ||
53 | .. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c | |
54 | :doc: overview | |
55 | ||
56 | Implementing Asynchronous Atomic Commit | |
57 | --------------------------------------- | |
58 | ||
59 | .. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c | |
60 | :doc: implementing nonblocking commit | |
61 | ||
62 | Atomic State Reset and Initialization | |
63 | ------------------------------------- | |
64 | ||
65 | .. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c | |
66 | :doc: atomic state reset and initialization | |
67 | ||
1ea0c02e DV |
68 | Helper Functions Reference |
69 | -------------------------- | |
70 | ||
2fa91d15 JN |
71 | .. kernel-doc:: include/drm/drm_atomic_helper.h |
72 | :internal: | |
73 | ||
74 | .. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c | |
75 | :export: | |
76 | ||
bcb32b69 DV |
77 | Simple KMS Helper Reference |
78 | =========================== | |
2fa91d15 | 79 | |
1ea35768 DV |
80 | .. kernel-doc:: drivers/gpu/drm/drm_simple_kms_helper.c |
81 | :doc: overview | |
82 | ||
bcb32b69 DV |
83 | .. kernel-doc:: include/drm/drm_simple_kms_helper.h |
84 | :internal: | |
2fa91d15 | 85 | |
bcb32b69 | 86 | .. kernel-doc:: drivers/gpu/drm/drm_simple_kms_helper.c |
2fa91d15 JN |
87 | :export: |
88 | ||
89 | fbdev Helper Functions Reference | |
90 | ================================ | |
91 | ||
92 | .. kernel-doc:: drivers/gpu/drm/drm_fb_helper.c | |
93 | :doc: fbdev helpers | |
94 | ||
2fa91d15 JN |
95 | .. kernel-doc:: include/drm/drm_fb_helper.h |
96 | :internal: | |
97 | ||
1ea35768 DV |
98 | .. kernel-doc:: drivers/gpu/drm/drm_fb_helper.c |
99 | :export: | |
100 | ||
2fa91d15 JN |
101 | Framebuffer CMA Helper Functions Reference |
102 | ========================================== | |
103 | ||
104 | .. kernel-doc:: drivers/gpu/drm/drm_fb_cma_helper.c | |
105 | :doc: framebuffer cma helper functions | |
106 | ||
107 | .. kernel-doc:: drivers/gpu/drm/drm_fb_cma_helper.c | |
108 | :export: | |
109 | ||
2564d0b0 DV |
110 | .. _drm_bridges: |
111 | ||
9bea6dd0 DV |
112 | Framebuffer GEM Helper Reference |
113 | ================================ | |
114 | ||
115 | .. kernel-doc:: drivers/gpu/drm/drm_gem_framebuffer_helper.c | |
116 | :doc: overview | |
117 | ||
118 | .. kernel-doc:: drivers/gpu/drm/drm_gem_framebuffer_helper.c | |
119 | :export: | |
120 | ||
bcb32b69 DV |
121 | Bridges |
122 | ======= | |
123 | ||
124 | Overview | |
125 | -------- | |
126 | ||
127 | .. kernel-doc:: drivers/gpu/drm/drm_bridge.c | |
128 | :doc: overview | |
129 | ||
130 | Default bridge callback sequence | |
131 | -------------------------------- | |
132 | ||
133 | .. kernel-doc:: drivers/gpu/drm/drm_bridge.c | |
134 | :doc: bridge callbacks | |
135 | ||
199e4e96 DV |
136 | |
137 | Bridge Helper Reference | |
138 | ------------------------- | |
139 | ||
140 | .. kernel-doc:: include/drm/drm_bridge.h | |
141 | :internal: | |
142 | ||
bcb32b69 DV |
143 | .. kernel-doc:: drivers/gpu/drm/drm_bridge.c |
144 | :export: | |
145 | ||
13dfc054 EA |
146 | Panel-Bridge Helper Reference |
147 | ----------------------------- | |
148 | ||
149 | .. kernel-doc:: drivers/gpu/drm/bridge/panel.c | |
150 | :export: | |
151 | ||
2564d0b0 DV |
152 | .. _drm_panel_helper: |
153 | ||
bcb32b69 DV |
154 | Panel Helper Reference |
155 | ====================== | |
156 | ||
1ea35768 DV |
157 | .. kernel-doc:: drivers/gpu/drm/drm_panel.c |
158 | :doc: drm panel | |
159 | ||
bcb32b69 DV |
160 | .. kernel-doc:: include/drm/drm_panel.h |
161 | :internal: | |
162 | ||
163 | .. kernel-doc:: drivers/gpu/drm/drm_panel.c | |
164 | :export: | |
165 | ||
404d1a3e HG |
166 | .. kernel-doc:: drivers/gpu/drm/drm_panel_orientation_quirks.c |
167 | :export: | |
168 | ||
2fa91d15 JN |
169 | Display Port Helper Functions Reference |
170 | ======================================= | |
171 | ||
172 | .. kernel-doc:: drivers/gpu/drm/drm_dp_helper.c | |
173 | :doc: dp helpers | |
174 | ||
175 | .. kernel-doc:: include/drm/drm_dp_helper.h | |
176 | :internal: | |
177 | ||
178 | .. kernel-doc:: drivers/gpu/drm/drm_dp_helper.c | |
179 | :export: | |
180 | ||
d2e2d265 HV |
181 | Display Port CEC Helper Functions Reference |
182 | =========================================== | |
183 | ||
184 | .. kernel-doc:: drivers/gpu/drm/drm_dp_cec.c | |
185 | :doc: dp cec helpers | |
186 | ||
187 | .. kernel-doc:: drivers/gpu/drm/drm_dp_cec.c | |
188 | :export: | |
189 | ||
2fa91d15 JN |
190 | Display Port Dual Mode Adaptor Helper Functions Reference |
191 | ========================================================= | |
192 | ||
193 | .. kernel-doc:: drivers/gpu/drm/drm_dp_dual_mode_helper.c | |
194 | :doc: dp dual mode helpers | |
195 | ||
196 | .. kernel-doc:: include/drm/drm_dp_dual_mode_helper.h | |
197 | :internal: | |
198 | ||
199 | .. kernel-doc:: drivers/gpu/drm/drm_dp_dual_mode_helper.c | |
200 | :export: | |
201 | ||
202 | Display Port MST Helper Functions Reference | |
203 | =========================================== | |
204 | ||
205 | .. kernel-doc:: drivers/gpu/drm/drm_dp_mst_topology.c | |
206 | :doc: dp mst helper | |
207 | ||
208 | .. kernel-doc:: include/drm/drm_dp_mst_helper.h | |
209 | :internal: | |
210 | ||
211 | .. kernel-doc:: drivers/gpu/drm/drm_dp_mst_topology.c | |
212 | :export: | |
213 | ||
214 | MIPI DSI Helper Functions Reference | |
215 | =================================== | |
216 | ||
217 | .. kernel-doc:: drivers/gpu/drm/drm_mipi_dsi.c | |
218 | :doc: dsi helpers | |
219 | ||
220 | .. kernel-doc:: include/drm/drm_mipi_dsi.h | |
221 | :internal: | |
222 | ||
223 | .. kernel-doc:: drivers/gpu/drm/drm_mipi_dsi.c | |
224 | :export: | |
225 | ||
bcb32b69 DV |
226 | Output Probing Helper Functions Reference |
227 | ========================================= | |
228 | ||
229 | .. kernel-doc:: drivers/gpu/drm/drm_probe_helper.c | |
230 | :doc: output probing helper overview | |
231 | ||
232 | .. kernel-doc:: drivers/gpu/drm/drm_probe_helper.c | |
233 | :export: | |
234 | ||
2fa91d15 JN |
235 | EDID Helper Functions Reference |
236 | =============================== | |
237 | ||
cdc3d09f DV |
238 | .. kernel-doc:: include/drm/drm_edid.h |
239 | :internal: | |
240 | ||
2fa91d15 JN |
241 | .. kernel-doc:: drivers/gpu/drm/drm_edid.c |
242 | :export: | |
243 | ||
3ad33ae2 TR |
244 | SCDC Helper Functions Reference |
245 | =============================== | |
246 | ||
247 | .. kernel-doc:: drivers/gpu/drm/drm_scdc_helper.c | |
248 | :doc: scdc helpers | |
249 | ||
250 | .. kernel-doc:: include/drm/drm_scdc_helper.h | |
251 | :internal: | |
252 | ||
253 | .. kernel-doc:: drivers/gpu/drm/drm_scdc_helper.c | |
254 | :export: | |
255 | ||
2fa91d15 JN |
256 | Rectangle Utilities Reference |
257 | ============================= | |
258 | ||
259 | .. kernel-doc:: include/drm/drm_rect.h | |
260 | :doc: rect utils | |
261 | ||
262 | .. kernel-doc:: include/drm/drm_rect.h | |
263 | :internal: | |
264 | ||
265 | .. kernel-doc:: drivers/gpu/drm/drm_rect.c | |
266 | :export: | |
267 | ||
2fa91d15 JN |
268 | HDMI Infoframes Helper Reference |
269 | ================================ | |
270 | ||
271 | Strictly speaking this is not a DRM helper library but generally useable | |
272 | by any driver interfacing with HDMI outputs like v4l or alsa drivers. | |
273 | But it nicely fits into the overall topic of mode setting helper | |
274 | libraries and hence is also included here. | |
275 | ||
276 | .. kernel-doc:: include/linux/hdmi.h | |
277 | :internal: | |
278 | ||
279 | .. kernel-doc:: drivers/video/hdmi.c | |
280 | :export: | |
281 | ||
bcb32b69 DV |
282 | Flip-work Helper Reference |
283 | ========================== | |
2fa91d15 | 284 | |
bcb32b69 DV |
285 | .. kernel-doc:: include/drm/drm_flip_work.h |
286 | :doc: flip utils | |
2fa91d15 | 287 | |
bcb32b69 DV |
288 | .. kernel-doc:: include/drm/drm_flip_work.h |
289 | :internal: | |
2fa91d15 | 290 | |
bcb32b69 | 291 | .. kernel-doc:: drivers/gpu/drm/drm_flip_work.c |
2fa91d15 JN |
292 | :export: |
293 | ||
1de72faf DV |
294 | Auxiliary Modeset Helpers |
295 | ========================= | |
296 | ||
297 | .. kernel-doc:: drivers/gpu/drm/drm_modeset_helper.c | |
298 | :doc: aux kms helpers | |
299 | ||
300 | .. kernel-doc:: drivers/gpu/drm/drm_modeset_helper.c | |
301 | :export: | |
4c3dbb2c | 302 | |
7f9e7ec9 DV |
303 | OF/DT Helpers |
304 | ============= | |
305 | ||
306 | .. kernel-doc:: drivers/gpu/drm/drm_of.c | |
307 | :doc: overview | |
308 | ||
309 | .. kernel-doc:: drivers/gpu/drm/drm_of.c | |
310 | :export: | |
311 | ||
5fca5ece DV |
312 | Legacy Plane Helper Reference |
313 | ============================= | |
314 | ||
315 | .. kernel-doc:: drivers/gpu/drm/drm_plane_helper.c | |
316 | :doc: overview | |
317 | ||
318 | .. kernel-doc:: drivers/gpu/drm/drm_plane_helper.c | |
319 | :export: | |
320 | ||
321 | Legacy CRTC/Modeset Helper Functions Reference | |
322 | ============================================== | |
323 | ||
324 | .. kernel-doc:: drivers/gpu/drm/drm_crtc_helper.c | |
325 | :doc: overview | |
326 | ||
327 | .. kernel-doc:: drivers/gpu/drm/drm_crtc_helper.c | |
328 | :export: |