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 | } | |
42 | EXPORT_SYMBOL_GPL(rockchip_fb_get_gem_obj); | |
43 | ||
44 | static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb) | |
45 | { | |
46 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
47 | struct drm_gem_object *obj; | |
48 | int i; | |
49 | ||
50 | for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) { | |
51 | obj = rockchip_fb->obj[i]; | |
52 | if (obj) | |
53 | drm_gem_object_unreference_unlocked(obj); | |
54 | } | |
55 | ||
56 | drm_framebuffer_cleanup(fb); | |
57 | kfree(rockchip_fb); | |
58 | } | |
59 | ||
60 | static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, | |
61 | struct drm_file *file_priv, | |
62 | unsigned int *handle) | |
63 | { | |
64 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
65 | ||
66 | return drm_gem_handle_create(file_priv, | |
67 | rockchip_fb->obj[0], handle); | |
68 | } | |
69 | ||
28c508ec | 70 | static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { |
2048e328 MY |
71 | .destroy = rockchip_drm_fb_destroy, |
72 | .create_handle = rockchip_drm_fb_create_handle, | |
73 | }; | |
74 | ||
75 | static struct rockchip_drm_fb * | |
1eb83451 | 76 | rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
77 | struct drm_gem_object **obj, unsigned int num_planes) |
78 | { | |
79 | struct rockchip_drm_fb *rockchip_fb; | |
80 | int ret; | |
81 | int i; | |
82 | ||
83 | rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL); | |
84 | if (!rockchip_fb) | |
85 | return ERR_PTR(-ENOMEM); | |
86 | ||
87 | drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd); | |
88 | ||
89 | for (i = 0; i < num_planes; i++) | |
90 | rockchip_fb->obj[i] = obj[i]; | |
91 | ||
92 | ret = drm_framebuffer_init(dev, &rockchip_fb->fb, | |
93 | &rockchip_drm_fb_funcs); | |
94 | if (ret) { | |
95 | dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", | |
96 | ret); | |
97 | kfree(rockchip_fb); | |
98 | return ERR_PTR(ret); | |
99 | } | |
100 | ||
101 | return rockchip_fb; | |
102 | } | |
103 | ||
104 | static struct drm_framebuffer * | |
105 | rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, | |
1eb83451 | 106 | const struct drm_mode_fb_cmd2 *mode_cmd) |
2048e328 MY |
107 | { |
108 | struct rockchip_drm_fb *rockchip_fb; | |
109 | struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; | |
110 | struct drm_gem_object *obj; | |
111 | unsigned int hsub; | |
112 | unsigned int vsub; | |
113 | int num_planes; | |
114 | int ret; | |
115 | int i; | |
116 | ||
117 | hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); | |
118 | vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); | |
119 | num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), | |
120 | ROCKCHIP_MAX_FB_BUFFER); | |
121 | ||
122 | for (i = 0; i < num_planes; i++) { | |
123 | unsigned int width = mode_cmd->width / (i ? hsub : 1); | |
124 | unsigned int height = mode_cmd->height / (i ? vsub : 1); | |
125 | unsigned int min_size; | |
126 | ||
127 | obj = drm_gem_object_lookup(dev, file_priv, | |
128 | mode_cmd->handles[i]); | |
129 | if (!obj) { | |
130 | dev_err(dev->dev, "Failed to lookup GEM object\n"); | |
131 | ret = -ENXIO; | |
132 | goto err_gem_object_unreference; | |
133 | } | |
134 | ||
135 | min_size = (height - 1) * mode_cmd->pitches[i] + | |
136 | mode_cmd->offsets[i] + | |
137 | width * drm_format_plane_cpp(mode_cmd->pixel_format, i); | |
138 | ||
139 | if (obj->size < min_size) { | |
140 | drm_gem_object_unreference_unlocked(obj); | |
141 | ret = -EINVAL; | |
142 | goto err_gem_object_unreference; | |
143 | } | |
144 | objs[i] = obj; | |
145 | } | |
146 | ||
147 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); | |
148 | if (IS_ERR(rockchip_fb)) { | |
149 | ret = PTR_ERR(rockchip_fb); | |
150 | goto err_gem_object_unreference; | |
151 | } | |
152 | ||
153 | return &rockchip_fb->fb; | |
154 | ||
155 | err_gem_object_unreference: | |
156 | for (i--; i >= 0; i--) | |
157 | drm_gem_object_unreference_unlocked(objs[i]); | |
158 | return ERR_PTR(ret); | |
159 | } | |
160 | ||
161 | static void rockchip_drm_output_poll_changed(struct drm_device *dev) | |
162 | { | |
163 | struct rockchip_drm_private *private = dev->dev_private; | |
164 | struct drm_fb_helper *fb_helper = &private->fbdev_helper; | |
165 | ||
765c35bb HS |
166 | if (fb_helper) |
167 | drm_fb_helper_hotplug_event(fb_helper); | |
2048e328 MY |
168 | } |
169 | ||
63ebb9fa MY |
170 | static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc) |
171 | { | |
172 | struct rockchip_drm_private *priv = crtc->dev->dev_private; | |
173 | int pipe = drm_crtc_index(crtc); | |
174 | const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe]; | |
175 | ||
176 | if (crtc_funcs && crtc_funcs->wait_for_update) | |
177 | crtc_funcs->wait_for_update(crtc); | |
178 | } | |
179 | ||
180 | static void | |
181 | rockchip_atomic_wait_for_complete(struct drm_atomic_state *old_state) | |
182 | { | |
183 | struct drm_crtc_state *old_crtc_state; | |
184 | struct drm_crtc *crtc; | |
185 | int i, ret; | |
186 | ||
187 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { | |
188 | /* No one cares about the old state, so abuse it for tracking | |
189 | * and store whether we hold a vblank reference (and should do a | |
190 | * vblank wait) in the ->enable boolean. | |
191 | */ | |
192 | old_crtc_state->enable = false; | |
193 | ||
194 | if (!crtc->state->active) | |
195 | continue; | |
196 | ||
197 | ret = drm_crtc_vblank_get(crtc); | |
198 | if (ret != 0) | |
199 | continue; | |
200 | ||
201 | old_crtc_state->enable = true; | |
202 | } | |
203 | ||
204 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { | |
205 | if (!old_crtc_state->enable) | |
206 | continue; | |
207 | ||
208 | rockchip_crtc_wait_for_update(crtc); | |
209 | drm_crtc_vblank_put(crtc); | |
210 | } | |
211 | } | |
212 | ||
f32fad51 MY |
213 | static void |
214 | rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit) | |
63ebb9fa | 215 | { |
f32fad51 MY |
216 | struct drm_atomic_state *state = commit->state; |
217 | struct drm_device *dev = commit->dev; | |
63ebb9fa MY |
218 | |
219 | /* | |
220 | * TODO: do fence wait here. | |
221 | */ | |
222 | ||
223 | /* | |
224 | * Rockchip crtc support runtime PM, can't update display planes | |
225 | * when crtc is disabled. | |
226 | * | |
227 | * drm_atomic_helper_commit comments detail that: | |
228 | * For drivers supporting runtime PM the recommended sequence is | |
229 | * | |
230 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
231 | * | |
232 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
233 | * | |
234 | * drm_atomic_helper_commit_planes(dev, state, true); | |
235 | * | |
236 | * See the kerneldoc entries for these three functions for more details. | |
237 | */ | |
238 | drm_atomic_helper_commit_modeset_disables(dev, state); | |
239 | ||
240 | drm_atomic_helper_commit_modeset_enables(dev, state); | |
241 | ||
242 | drm_atomic_helper_commit_planes(dev, state, true); | |
243 | ||
244 | rockchip_atomic_wait_for_complete(state); | |
245 | ||
246 | drm_atomic_helper_cleanup_planes(dev, state); | |
247 | ||
248 | drm_atomic_state_free(state); | |
f32fad51 MY |
249 | } |
250 | ||
251 | void rockchip_drm_atomic_work(struct work_struct *work) | |
252 | { | |
253 | struct rockchip_atomic_commit *commit = container_of(work, | |
254 | struct rockchip_atomic_commit, work); | |
255 | ||
256 | rockchip_atomic_commit_complete(commit); | |
257 | } | |
258 | ||
259 | int rockchip_drm_atomic_commit(struct drm_device *dev, | |
260 | struct drm_atomic_state *state, | |
261 | bool async) | |
262 | { | |
263 | struct rockchip_drm_private *private = dev->dev_private; | |
264 | struct rockchip_atomic_commit *commit = &private->commit; | |
265 | int ret; | |
266 | ||
267 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
268 | if (ret) | |
269 | return ret; | |
270 | ||
271 | /* serialize outstanding asynchronous commits */ | |
272 | mutex_lock(&commit->lock); | |
273 | flush_work(&commit->work); | |
274 | ||
275 | drm_atomic_helper_swap_state(dev, state); | |
276 | ||
277 | commit->dev = dev; | |
278 | commit->state = state; | |
279 | ||
280 | if (async) | |
281 | schedule_work(&commit->work); | |
282 | else | |
283 | rockchip_atomic_commit_complete(commit); | |
284 | ||
285 | mutex_unlock(&commit->lock); | |
63ebb9fa MY |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
2048e328 MY |
290 | static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { |
291 | .fb_create = rockchip_user_fb_create, | |
292 | .output_poll_changed = rockchip_drm_output_poll_changed, | |
63ebb9fa MY |
293 | .atomic_check = drm_atomic_helper_check, |
294 | .atomic_commit = rockchip_drm_atomic_commit, | |
2048e328 MY |
295 | }; |
296 | ||
297 | struct drm_framebuffer * | |
298 | rockchip_drm_framebuffer_init(struct drm_device *dev, | |
1eb83451 | 299 | const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
300 | struct drm_gem_object *obj) |
301 | { | |
302 | struct rockchip_drm_fb *rockchip_fb; | |
303 | ||
304 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); | |
305 | if (IS_ERR(rockchip_fb)) | |
306 | return NULL; | |
307 | ||
308 | return &rockchip_fb->fb; | |
309 | } | |
310 | ||
311 | void rockchip_drm_mode_config_init(struct drm_device *dev) | |
312 | { | |
313 | dev->mode_config.min_width = 0; | |
314 | dev->mode_config.min_height = 0; | |
315 | ||
316 | /* | |
317 | * set max width and height as default value(4096x4096). | |
318 | * this value would be used to check framebuffer size limitation | |
319 | * at drm_mode_addfb(). | |
320 | */ | |
321 | dev->mode_config.max_width = 4096; | |
322 | dev->mode_config.max_height = 4096; | |
323 | ||
324 | dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; | |
325 | } |