Commit | Line | Data |
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2048e328 MY |
1 | /* |
2 | * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd | |
3 | * Author:Mark Yao <mark.yao@rock-chips.com> | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <drm/drm.h> | |
17 | #include <drm/drmP.h> | |
63ebb9fa | 18 | #include <drm/drm_atomic.h> |
2048e328 MY |
19 | #include <drm/drm_fb_helper.h> |
20 | #include <drm/drm_crtc_helper.h> | |
21 | ||
22 | #include "rockchip_drm_drv.h" | |
23 | #include "rockchip_drm_gem.h" | |
24 | ||
25 | #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) | |
26 | ||
27 | struct rockchip_drm_fb { | |
28 | struct drm_framebuffer fb; | |
29 | struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER]; | |
30 | }; | |
31 | ||
32 | struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb, | |
33 | unsigned int plane) | |
34 | { | |
35 | struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb); | |
36 | ||
37 | if (plane >= ROCKCHIP_MAX_FB_BUFFER) | |
38 | return NULL; | |
39 | ||
40 | return rk_fb->obj[plane]; | |
41 | } | |
2048e328 MY |
42 | |
43 | static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb) | |
44 | { | |
45 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
46 | struct drm_gem_object *obj; | |
47 | int i; | |
48 | ||
49 | for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) { | |
50 | obj = rockchip_fb->obj[i]; | |
51 | if (obj) | |
52 | drm_gem_object_unreference_unlocked(obj); | |
53 | } | |
54 | ||
55 | drm_framebuffer_cleanup(fb); | |
56 | kfree(rockchip_fb); | |
57 | } | |
58 | ||
59 | static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, | |
60 | struct drm_file *file_priv, | |
61 | unsigned int *handle) | |
62 | { | |
63 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
64 | ||
65 | return drm_gem_handle_create(file_priv, | |
66 | rockchip_fb->obj[0], handle); | |
67 | } | |
68 | ||
28c508ec | 69 | static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { |
2048e328 MY |
70 | .destroy = rockchip_drm_fb_destroy, |
71 | .create_handle = rockchip_drm_fb_create_handle, | |
72 | }; | |
73 | ||
74 | static struct rockchip_drm_fb * | |
1eb83451 | 75 | rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
76 | struct drm_gem_object **obj, unsigned int num_planes) |
77 | { | |
78 | struct rockchip_drm_fb *rockchip_fb; | |
79 | int ret; | |
80 | int i; | |
81 | ||
82 | rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL); | |
83 | if (!rockchip_fb) | |
84 | return ERR_PTR(-ENOMEM); | |
85 | ||
86 | drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd); | |
87 | ||
88 | for (i = 0; i < num_planes; i++) | |
89 | rockchip_fb->obj[i] = obj[i]; | |
90 | ||
91 | ret = drm_framebuffer_init(dev, &rockchip_fb->fb, | |
92 | &rockchip_drm_fb_funcs); | |
93 | if (ret) { | |
94 | dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", | |
95 | ret); | |
96 | kfree(rockchip_fb); | |
97 | return ERR_PTR(ret); | |
98 | } | |
99 | ||
100 | return rockchip_fb; | |
101 | } | |
102 | ||
103 | static struct drm_framebuffer * | |
104 | rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, | |
1eb83451 | 105 | const struct drm_mode_fb_cmd2 *mode_cmd) |
2048e328 MY |
106 | { |
107 | struct rockchip_drm_fb *rockchip_fb; | |
108 | struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; | |
109 | struct drm_gem_object *obj; | |
110 | unsigned int hsub; | |
111 | unsigned int vsub; | |
112 | int num_planes; | |
113 | int ret; | |
114 | int i; | |
115 | ||
116 | hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); | |
117 | vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); | |
118 | num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), | |
119 | ROCKCHIP_MAX_FB_BUFFER); | |
120 | ||
121 | for (i = 0; i < num_planes; i++) { | |
122 | unsigned int width = mode_cmd->width / (i ? hsub : 1); | |
123 | unsigned int height = mode_cmd->height / (i ? vsub : 1); | |
124 | unsigned int min_size; | |
125 | ||
126 | obj = drm_gem_object_lookup(dev, file_priv, | |
127 | mode_cmd->handles[i]); | |
128 | if (!obj) { | |
129 | dev_err(dev->dev, "Failed to lookup GEM object\n"); | |
130 | ret = -ENXIO; | |
131 | goto err_gem_object_unreference; | |
132 | } | |
133 | ||
134 | min_size = (height - 1) * mode_cmd->pitches[i] + | |
135 | mode_cmd->offsets[i] + | |
136 | width * drm_format_plane_cpp(mode_cmd->pixel_format, i); | |
137 | ||
138 | if (obj->size < min_size) { | |
139 | drm_gem_object_unreference_unlocked(obj); | |
140 | ret = -EINVAL; | |
141 | goto err_gem_object_unreference; | |
142 | } | |
143 | objs[i] = obj; | |
144 | } | |
145 | ||
146 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); | |
147 | if (IS_ERR(rockchip_fb)) { | |
148 | ret = PTR_ERR(rockchip_fb); | |
149 | goto err_gem_object_unreference; | |
150 | } | |
151 | ||
152 | return &rockchip_fb->fb; | |
153 | ||
154 | err_gem_object_unreference: | |
155 | for (i--; i >= 0; i--) | |
156 | drm_gem_object_unreference_unlocked(objs[i]); | |
157 | return ERR_PTR(ret); | |
158 | } | |
159 | ||
160 | static void rockchip_drm_output_poll_changed(struct drm_device *dev) | |
161 | { | |
162 | struct rockchip_drm_private *private = dev->dev_private; | |
163 | struct drm_fb_helper *fb_helper = &private->fbdev_helper; | |
164 | ||
765c35bb HS |
165 | if (fb_helper) |
166 | drm_fb_helper_hotplug_event(fb_helper); | |
2048e328 MY |
167 | } |
168 | ||
63ebb9fa MY |
169 | static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc) |
170 | { | |
171 | struct rockchip_drm_private *priv = crtc->dev->dev_private; | |
172 | int pipe = drm_crtc_index(crtc); | |
173 | const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe]; | |
174 | ||
175 | if (crtc_funcs && crtc_funcs->wait_for_update) | |
176 | crtc_funcs->wait_for_update(crtc); | |
177 | } | |
178 | ||
c9ad1d99 JK |
179 | /* |
180 | * We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066 | |
181 | * have hardware counters for neither vblanks nor scanlines, which results in | |
182 | * a race where: | |
183 | * | <-- HW vsync irq and reg take effect | |
184 | * plane_commit --> | | |
185 | * get_vblank and wait --> | | |
186 | * | <-- handle_vblank, vblank->count + 1 | |
187 | * cleanup_fb --> | | |
188 | * iommu crash --> | | |
189 | * | <-- HW vsync irq and reg take effect | |
190 | * | |
191 | * This function is equivalent but uses rockchip_crtc_wait_for_update() instead | |
192 | * of waiting for vblank_count to change. | |
193 | */ | |
63ebb9fa | 194 | static void |
f2227f46 | 195 | rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state) |
63ebb9fa MY |
196 | { |
197 | struct drm_crtc_state *old_crtc_state; | |
198 | struct drm_crtc *crtc; | |
199 | int i, ret; | |
200 | ||
201 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { | |
202 | /* No one cares about the old state, so abuse it for tracking | |
203 | * and store whether we hold a vblank reference (and should do a | |
204 | * vblank wait) in the ->enable boolean. | |
205 | */ | |
206 | old_crtc_state->enable = false; | |
207 | ||
208 | if (!crtc->state->active) | |
209 | continue; | |
210 | ||
f2227f46 JK |
211 | if (!drm_atomic_helper_framebuffer_changed(dev, |
212 | old_state, crtc)) | |
213 | continue; | |
214 | ||
63ebb9fa MY |
215 | ret = drm_crtc_vblank_get(crtc); |
216 | if (ret != 0) | |
217 | continue; | |
218 | ||
219 | old_crtc_state->enable = true; | |
220 | } | |
221 | ||
222 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { | |
223 | if (!old_crtc_state->enable) | |
224 | continue; | |
225 | ||
226 | rockchip_crtc_wait_for_update(crtc); | |
227 | drm_crtc_vblank_put(crtc); | |
228 | } | |
229 | } | |
230 | ||
f32fad51 MY |
231 | static void |
232 | rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit) | |
63ebb9fa | 233 | { |
f32fad51 MY |
234 | struct drm_atomic_state *state = commit->state; |
235 | struct drm_device *dev = commit->dev; | |
63ebb9fa MY |
236 | |
237 | /* | |
238 | * TODO: do fence wait here. | |
239 | */ | |
240 | ||
241 | /* | |
242 | * Rockchip crtc support runtime PM, can't update display planes | |
243 | * when crtc is disabled. | |
244 | * | |
245 | * drm_atomic_helper_commit comments detail that: | |
246 | * For drivers supporting runtime PM the recommended sequence is | |
247 | * | |
248 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
249 | * | |
250 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
251 | * | |
252 | * drm_atomic_helper_commit_planes(dev, state, true); | |
253 | * | |
254 | * See the kerneldoc entries for these three functions for more details. | |
255 | */ | |
256 | drm_atomic_helper_commit_modeset_disables(dev, state); | |
257 | ||
258 | drm_atomic_helper_commit_modeset_enables(dev, state); | |
259 | ||
260 | drm_atomic_helper_commit_planes(dev, state, true); | |
261 | ||
f2227f46 | 262 | rockchip_atomic_wait_for_complete(dev, state); |
63ebb9fa MY |
263 | |
264 | drm_atomic_helper_cleanup_planes(dev, state); | |
265 | ||
266 | drm_atomic_state_free(state); | |
f32fad51 MY |
267 | } |
268 | ||
269 | void rockchip_drm_atomic_work(struct work_struct *work) | |
270 | { | |
271 | struct rockchip_atomic_commit *commit = container_of(work, | |
272 | struct rockchip_atomic_commit, work); | |
273 | ||
274 | rockchip_atomic_commit_complete(commit); | |
275 | } | |
276 | ||
277 | int rockchip_drm_atomic_commit(struct drm_device *dev, | |
278 | struct drm_atomic_state *state, | |
279 | bool async) | |
280 | { | |
281 | struct rockchip_drm_private *private = dev->dev_private; | |
282 | struct rockchip_atomic_commit *commit = &private->commit; | |
283 | int ret; | |
284 | ||
285 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
286 | if (ret) | |
287 | return ret; | |
288 | ||
289 | /* serialize outstanding asynchronous commits */ | |
290 | mutex_lock(&commit->lock); | |
291 | flush_work(&commit->work); | |
292 | ||
293 | drm_atomic_helper_swap_state(dev, state); | |
294 | ||
295 | commit->dev = dev; | |
296 | commit->state = state; | |
297 | ||
298 | if (async) | |
299 | schedule_work(&commit->work); | |
300 | else | |
301 | rockchip_atomic_commit_complete(commit); | |
302 | ||
303 | mutex_unlock(&commit->lock); | |
63ebb9fa MY |
304 | |
305 | return 0; | |
306 | } | |
307 | ||
2048e328 MY |
308 | static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { |
309 | .fb_create = rockchip_user_fb_create, | |
310 | .output_poll_changed = rockchip_drm_output_poll_changed, | |
63ebb9fa MY |
311 | .atomic_check = drm_atomic_helper_check, |
312 | .atomic_commit = rockchip_drm_atomic_commit, | |
2048e328 MY |
313 | }; |
314 | ||
315 | struct drm_framebuffer * | |
316 | rockchip_drm_framebuffer_init(struct drm_device *dev, | |
1eb83451 | 317 | const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
318 | struct drm_gem_object *obj) |
319 | { | |
320 | struct rockchip_drm_fb *rockchip_fb; | |
321 | ||
322 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); | |
323 | if (IS_ERR(rockchip_fb)) | |
324 | return NULL; | |
325 | ||
326 | return &rockchip_fb->fb; | |
327 | } | |
328 | ||
329 | void rockchip_drm_mode_config_init(struct drm_device *dev) | |
330 | { | |
331 | dev->mode_config.min_width = 0; | |
332 | dev->mode_config.min_height = 0; | |
333 | ||
334 | /* | |
335 | * set max width and height as default value(4096x4096). | |
336 | * this value would be used to check framebuffer size limitation | |
337 | * at drm_mode_addfb(). | |
338 | */ | |
339 | dev->mode_config.max_width = 4096; | |
340 | dev->mode_config.max_height = 4096; | |
341 | ||
342 | dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; | |
343 | } |