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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 | * based on exynos_drm_drv.c | |
6 | * | |
7 | * This software is licensed under the terms of the GNU General Public | |
8 | * License version 2, as published by the Free Software Foundation, and | |
9 | * may be copied, distributed, and modified under those terms. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <asm/dma-iommu.h> | |
18 | ||
19 | #include <drm/drmP.h> | |
20 | #include <drm/drm_crtc_helper.h> | |
21 | #include <drm/drm_fb_helper.h> | |
22 | #include <linux/dma-mapping.h> | |
23 | #include <linux/pm_runtime.h> | |
00fe6148 | 24 | #include <linux/module.h> |
2048e328 MY |
25 | #include <linux/of_graph.h> |
26 | #include <linux/component.h> | |
27 | ||
28 | #include "rockchip_drm_drv.h" | |
29 | #include "rockchip_drm_fb.h" | |
30 | #include "rockchip_drm_fbdev.h" | |
31 | #include "rockchip_drm_gem.h" | |
32 | ||
33 | #define DRIVER_NAME "rockchip" | |
34 | #define DRIVER_DESC "RockChip Soc DRM" | |
35 | #define DRIVER_DATE "20140818" | |
36 | #define DRIVER_MAJOR 1 | |
37 | #define DRIVER_MINOR 0 | |
38 | ||
39 | /* | |
40 | * Attach a (component) device to the shared drm dma mapping from master drm | |
41 | * device. This is used by the VOPs to map GEM buffers to a common DMA | |
42 | * mapping. | |
43 | */ | |
44 | int rockchip_drm_dma_attach_device(struct drm_device *drm_dev, | |
45 | struct device *dev) | |
46 | { | |
47 | struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping; | |
48 | int ret; | |
49 | ||
50 | ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); | |
51 | if (ret) | |
52 | return ret; | |
53 | ||
54 | dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); | |
55 | ||
56 | return arm_iommu_attach_device(dev, mapping); | |
57 | } | |
58 | EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device); | |
59 | ||
60 | void rockchip_drm_dma_detach_device(struct drm_device *drm_dev, | |
61 | struct device *dev) | |
62 | { | |
63 | arm_iommu_detach_device(dev); | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device); | |
66 | ||
67 | int rockchip_register_crtc_funcs(struct drm_device *dev, | |
68 | const struct rockchip_crtc_funcs *crtc_funcs, | |
69 | int pipe) | |
70 | { | |
71 | struct rockchip_drm_private *priv = dev->dev_private; | |
72 | ||
73 | if (pipe > ROCKCHIP_MAX_CRTC) | |
74 | return -EINVAL; | |
75 | ||
76 | priv->crtc_funcs[pipe] = crtc_funcs; | |
77 | ||
78 | return 0; | |
79 | } | |
80 | EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs); | |
81 | ||
82 | void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe) | |
83 | { | |
84 | struct rockchip_drm_private *priv = dev->dev_private; | |
85 | ||
86 | if (pipe > ROCKCHIP_MAX_CRTC) | |
87 | return; | |
88 | ||
89 | priv->crtc_funcs[pipe] = NULL; | |
90 | } | |
91 | EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs); | |
92 | ||
93 | static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm, | |
94 | int pipe) | |
95 | { | |
96 | struct drm_crtc *crtc; | |
97 | int i = 0; | |
98 | ||
99 | list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) | |
100 | if (i++ == pipe) | |
101 | return crtc; | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
106 | static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev, int pipe) | |
107 | { | |
108 | struct rockchip_drm_private *priv = dev->dev_private; | |
109 | struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe); | |
110 | ||
111 | if (crtc && priv->crtc_funcs[pipe] && | |
112 | priv->crtc_funcs[pipe]->enable_vblank) | |
113 | return priv->crtc_funcs[pipe]->enable_vblank(crtc); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev, int pipe) | |
119 | { | |
120 | struct rockchip_drm_private *priv = dev->dev_private; | |
121 | struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe); | |
122 | ||
123 | if (crtc && priv->crtc_funcs[pipe] && | |
124 | priv->crtc_funcs[pipe]->enable_vblank) | |
125 | priv->crtc_funcs[pipe]->disable_vblank(crtc); | |
126 | } | |
127 | ||
128 | static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags) | |
129 | { | |
130 | struct rockchip_drm_private *private; | |
131 | struct dma_iommu_mapping *mapping; | |
132 | struct device *dev = drm_dev->dev; | |
d3007dab | 133 | struct drm_connector *connector; |
2048e328 MY |
134 | int ret; |
135 | ||
136 | private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL); | |
137 | if (!private) | |
138 | return -ENOMEM; | |
139 | ||
140 | drm_dev->dev_private = private; | |
141 | ||
142 | drm_mode_config_init(drm_dev); | |
143 | ||
144 | rockchip_drm_mode_config_init(drm_dev); | |
145 | ||
146 | dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), | |
147 | GFP_KERNEL); | |
148 | if (!dev->dma_parms) { | |
149 | ret = -ENOMEM; | |
150 | goto err_config_cleanup; | |
151 | } | |
152 | ||
153 | /* TODO(djkurtz): fetch the mapping start/size from somewhere */ | |
154 | mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000, | |
155 | SZ_2G); | |
156 | if (IS_ERR(mapping)) { | |
157 | ret = PTR_ERR(mapping); | |
158 | goto err_config_cleanup; | |
159 | } | |
160 | ||
161 | ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); | |
162 | if (ret) | |
163 | goto err_release_mapping; | |
164 | ||
165 | dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); | |
166 | ||
167 | ret = arm_iommu_attach_device(dev, mapping); | |
168 | if (ret) | |
169 | goto err_release_mapping; | |
170 | ||
171 | /* Try to bind all sub drivers. */ | |
172 | ret = component_bind_all(dev, drm_dev); | |
173 | if (ret) | |
174 | goto err_detach_device; | |
175 | ||
d3007dab DK |
176 | /* |
177 | * All components are now added, we can publish the connector sysfs | |
178 | * entries to userspace. This will generate hotplug events and so | |
179 | * userspace will expect to be able to access DRM at this point. | |
180 | */ | |
181 | list_for_each_entry(connector, &drm_dev->mode_config.connector_list, | |
182 | head) { | |
183 | ret = drm_connector_register(connector); | |
184 | if (ret) { | |
185 | dev_err(drm_dev->dev, | |
186 | "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n", | |
187 | connector->base.id, | |
188 | connector->name, ret); | |
189 | goto err_unbind; | |
190 | } | |
191 | } | |
192 | ||
2048e328 MY |
193 | /* init kms poll for handling hpd */ |
194 | drm_kms_helper_poll_init(drm_dev); | |
195 | ||
196 | /* | |
197 | * enable drm irq mode. | |
198 | * - with irq_enabled = true, we can use the vblank feature. | |
199 | */ | |
200 | drm_dev->irq_enabled = true; | |
201 | ||
202 | ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC); | |
203 | if (ret) | |
204 | goto err_kms_helper_poll_fini; | |
205 | ||
206 | /* | |
207 | * with vblank_disable_allowed = true, vblank interrupt will be disabled | |
208 | * by drm timer once a current process gives up ownership of | |
209 | * vblank event.(after drm_vblank_put function is called) | |
210 | */ | |
211 | drm_dev->vblank_disable_allowed = true; | |
212 | ||
213 | ret = rockchip_drm_fbdev_init(drm_dev); | |
214 | if (ret) | |
215 | goto err_vblank_cleanup; | |
216 | ||
217 | return 0; | |
218 | err_vblank_cleanup: | |
219 | drm_vblank_cleanup(drm_dev); | |
220 | err_kms_helper_poll_fini: | |
221 | drm_kms_helper_poll_fini(drm_dev); | |
d3007dab | 222 | err_unbind: |
2048e328 MY |
223 | component_unbind_all(dev, drm_dev); |
224 | err_detach_device: | |
225 | arm_iommu_detach_device(dev); | |
226 | err_release_mapping: | |
227 | arm_iommu_release_mapping(dev->archdata.mapping); | |
228 | err_config_cleanup: | |
229 | drm_mode_config_cleanup(drm_dev); | |
230 | drm_dev->dev_private = NULL; | |
231 | return ret; | |
232 | } | |
233 | ||
234 | static int rockchip_drm_unload(struct drm_device *drm_dev) | |
235 | { | |
236 | struct device *dev = drm_dev->dev; | |
237 | ||
238 | rockchip_drm_fbdev_fini(drm_dev); | |
239 | drm_vblank_cleanup(drm_dev); | |
240 | drm_kms_helper_poll_fini(drm_dev); | |
241 | component_unbind_all(dev, drm_dev); | |
242 | arm_iommu_detach_device(dev); | |
243 | arm_iommu_release_mapping(dev->archdata.mapping); | |
244 | drm_mode_config_cleanup(drm_dev); | |
245 | drm_dev->dev_private = NULL; | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | void rockchip_drm_lastclose(struct drm_device *dev) | |
251 | { | |
252 | struct rockchip_drm_private *priv = dev->dev_private; | |
253 | ||
254 | drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper); | |
255 | } | |
256 | ||
257 | static const struct file_operations rockchip_drm_driver_fops = { | |
258 | .owner = THIS_MODULE, | |
259 | .open = drm_open, | |
260 | .mmap = rockchip_gem_mmap, | |
261 | .poll = drm_poll, | |
262 | .read = drm_read, | |
263 | .unlocked_ioctl = drm_ioctl, | |
264 | #ifdef CONFIG_COMPAT | |
265 | .compat_ioctl = drm_compat_ioctl, | |
266 | #endif | |
267 | .release = drm_release, | |
268 | }; | |
269 | ||
270 | const struct vm_operations_struct rockchip_drm_vm_ops = { | |
271 | .open = drm_gem_vm_open, | |
272 | .close = drm_gem_vm_close, | |
273 | }; | |
274 | ||
275 | static struct drm_driver rockchip_drm_driver = { | |
276 | .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, | |
277 | .load = rockchip_drm_load, | |
278 | .unload = rockchip_drm_unload, | |
279 | .lastclose = rockchip_drm_lastclose, | |
280 | .get_vblank_counter = drm_vblank_count, | |
281 | .enable_vblank = rockchip_drm_crtc_enable_vblank, | |
282 | .disable_vblank = rockchip_drm_crtc_disable_vblank, | |
283 | .gem_vm_ops = &rockchip_drm_vm_ops, | |
284 | .gem_free_object = rockchip_gem_free_object, | |
285 | .dumb_create = rockchip_gem_dumb_create, | |
286 | .dumb_map_offset = rockchip_gem_dumb_map_offset, | |
287 | .dumb_destroy = drm_gem_dumb_destroy, | |
288 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd, | |
289 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle, | |
290 | .gem_prime_import = drm_gem_prime_import, | |
291 | .gem_prime_export = drm_gem_prime_export, | |
292 | .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table, | |
293 | .gem_prime_vmap = rockchip_gem_prime_vmap, | |
294 | .gem_prime_vunmap = rockchip_gem_prime_vunmap, | |
295 | .gem_prime_mmap = rockchip_gem_mmap_buf, | |
296 | .fops = &rockchip_drm_driver_fops, | |
297 | .name = DRIVER_NAME, | |
298 | .desc = DRIVER_DESC, | |
299 | .date = DRIVER_DATE, | |
300 | .major = DRIVER_MAJOR, | |
301 | .minor = DRIVER_MINOR, | |
302 | }; | |
303 | ||
304 | #ifdef CONFIG_PM_SLEEP | |
305 | static int rockchip_drm_sys_suspend(struct device *dev) | |
306 | { | |
307 | struct drm_device *drm = dev_get_drvdata(dev); | |
308 | struct drm_connector *connector; | |
309 | ||
310 | if (!drm) | |
311 | return 0; | |
312 | ||
313 | drm_modeset_lock_all(drm); | |
314 | list_for_each_entry(connector, &drm->mode_config.connector_list, head) { | |
315 | int old_dpms = connector->dpms; | |
316 | ||
317 | if (connector->funcs->dpms) | |
318 | connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); | |
319 | ||
320 | /* Set the old mode back to the connector for resume */ | |
321 | connector->dpms = old_dpms; | |
322 | } | |
323 | drm_modeset_unlock_all(drm); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int rockchip_drm_sys_resume(struct device *dev) | |
329 | { | |
330 | struct drm_device *drm = dev_get_drvdata(dev); | |
331 | struct drm_connector *connector; | |
332 | enum drm_connector_status status; | |
333 | bool changed = false; | |
334 | ||
335 | if (!drm) | |
336 | return 0; | |
337 | ||
338 | drm_modeset_lock_all(drm); | |
339 | list_for_each_entry(connector, &drm->mode_config.connector_list, head) { | |
340 | int desired_mode = connector->dpms; | |
341 | ||
342 | /* | |
343 | * at suspend time, we save dpms to connector->dpms, | |
344 | * restore the old_dpms, and at current time, the connector | |
345 | * dpms status must be DRM_MODE_DPMS_OFF. | |
346 | */ | |
347 | connector->dpms = DRM_MODE_DPMS_OFF; | |
348 | ||
349 | /* | |
350 | * If the connector has been disconnected during suspend, | |
351 | * disconnect it from the encoder and leave it off. We'll notify | |
352 | * userspace at the end. | |
353 | */ | |
354 | if (desired_mode == DRM_MODE_DPMS_ON) { | |
355 | status = connector->funcs->detect(connector, true); | |
356 | if (status == connector_status_disconnected) { | |
357 | connector->encoder = NULL; | |
358 | connector->status = status; | |
359 | changed = true; | |
360 | continue; | |
361 | } | |
362 | } | |
363 | if (connector->funcs->dpms) | |
364 | connector->funcs->dpms(connector, desired_mode); | |
365 | } | |
366 | drm_modeset_unlock_all(drm); | |
367 | ||
368 | drm_helper_resume_force_mode(drm); | |
369 | ||
370 | if (changed) | |
371 | drm_kms_helper_hotplug_event(drm); | |
372 | ||
373 | return 0; | |
374 | } | |
375 | #endif | |
376 | ||
377 | static const struct dev_pm_ops rockchip_drm_pm_ops = { | |
378 | SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend, | |
379 | rockchip_drm_sys_resume) | |
380 | }; | |
381 | ||
382 | /* | |
383 | * @node: device tree node containing encoder input ports | |
384 | * @encoder: drm_encoder | |
385 | */ | |
386 | int rockchip_drm_encoder_get_mux_id(struct device_node *node, | |
387 | struct drm_encoder *encoder) | |
388 | { | |
ecaa4902 | 389 | struct device_node *ep; |
2048e328 MY |
390 | struct drm_crtc *crtc = encoder->crtc; |
391 | struct of_endpoint endpoint; | |
392 | struct device_node *port; | |
393 | int ret; | |
394 | ||
395 | if (!node || !crtc) | |
396 | return -EINVAL; | |
397 | ||
ecaa4902 | 398 | for_each_endpoint_of_node(node, ep) { |
2048e328 MY |
399 | port = of_graph_get_remote_port(ep); |
400 | of_node_put(port); | |
401 | if (port == crtc->port) { | |
402 | ret = of_graph_parse_endpoint(ep, &endpoint); | |
ecaa4902 | 403 | of_node_put(ep); |
2048e328 MY |
404 | return ret ?: endpoint.id; |
405 | } | |
ecaa4902 | 406 | } |
2048e328 MY |
407 | |
408 | return -EINVAL; | |
409 | } | |
f66a1627 | 410 | EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id); |
2048e328 MY |
411 | |
412 | static int compare_of(struct device *dev, void *data) | |
413 | { | |
414 | struct device_node *np = data; | |
415 | ||
416 | return dev->of_node == np; | |
417 | } | |
418 | ||
419 | static void rockchip_add_endpoints(struct device *dev, | |
420 | struct component_match **match, | |
421 | struct device_node *port) | |
422 | { | |
423 | struct device_node *ep, *remote; | |
424 | ||
425 | for_each_child_of_node(port, ep) { | |
426 | remote = of_graph_get_remote_port_parent(ep); | |
427 | if (!remote || !of_device_is_available(remote)) { | |
428 | of_node_put(remote); | |
429 | continue; | |
430 | } else if (!of_device_is_available(remote->parent)) { | |
431 | dev_warn(dev, "parent device of %s is not available\n", | |
432 | remote->full_name); | |
433 | of_node_put(remote); | |
434 | continue; | |
435 | } | |
436 | ||
437 | component_match_add(dev, match, compare_of, remote); | |
438 | of_node_put(remote); | |
439 | } | |
440 | } | |
441 | ||
442 | static int rockchip_drm_bind(struct device *dev) | |
443 | { | |
444 | struct drm_device *drm; | |
445 | int ret; | |
446 | ||
447 | drm = drm_dev_alloc(&rockchip_drm_driver, dev); | |
448 | if (!drm) | |
449 | return -ENOMEM; | |
450 | ||
451 | ret = drm_dev_set_unique(drm, "%s", dev_name(dev)); | |
452 | if (ret) | |
453 | goto err_free; | |
454 | ||
455 | ret = drm_dev_register(drm, 0); | |
456 | if (ret) | |
457 | goto err_free; | |
458 | ||
459 | dev_set_drvdata(dev, drm); | |
460 | ||
461 | return 0; | |
462 | ||
463 | err_free: | |
464 | drm_dev_unref(drm); | |
465 | return ret; | |
466 | } | |
467 | ||
468 | static void rockchip_drm_unbind(struct device *dev) | |
469 | { | |
470 | struct drm_device *drm = dev_get_drvdata(dev); | |
471 | ||
472 | drm_dev_unregister(drm); | |
473 | drm_dev_unref(drm); | |
474 | dev_set_drvdata(dev, NULL); | |
475 | } | |
476 | ||
477 | static const struct component_master_ops rockchip_drm_ops = { | |
478 | .bind = rockchip_drm_bind, | |
479 | .unbind = rockchip_drm_unbind, | |
480 | }; | |
481 | ||
482 | static int rockchip_drm_platform_probe(struct platform_device *pdev) | |
483 | { | |
484 | struct device *dev = &pdev->dev; | |
485 | struct component_match *match = NULL; | |
486 | struct device_node *np = dev->of_node; | |
487 | struct device_node *port; | |
488 | int i; | |
489 | ||
490 | if (!np) | |
491 | return -ENODEV; | |
492 | /* | |
493 | * Bind the crtc ports first, so that | |
494 | * drm_of_find_possible_crtcs called from encoder .bind callbacks | |
495 | * works as expected. | |
496 | */ | |
497 | for (i = 0;; i++) { | |
498 | port = of_parse_phandle(np, "ports", i); | |
499 | if (!port) | |
500 | break; | |
501 | ||
502 | if (!of_device_is_available(port->parent)) { | |
503 | of_node_put(port); | |
504 | continue; | |
505 | } | |
506 | ||
507 | component_match_add(dev, &match, compare_of, port->parent); | |
508 | of_node_put(port); | |
509 | } | |
510 | ||
511 | if (i == 0) { | |
512 | dev_err(dev, "missing 'ports' property\n"); | |
513 | return -ENODEV; | |
514 | } | |
515 | ||
516 | if (!match) { | |
517 | dev_err(dev, "No available vop found for display-subsystem.\n"); | |
518 | return -ENODEV; | |
519 | } | |
520 | /* | |
521 | * For each bound crtc, bind the encoders attached to its | |
522 | * remote endpoint. | |
523 | */ | |
524 | for (i = 0;; i++) { | |
525 | port = of_parse_phandle(np, "ports", i); | |
526 | if (!port) | |
527 | break; | |
528 | ||
529 | if (!of_device_is_available(port->parent)) { | |
530 | of_node_put(port); | |
531 | continue; | |
532 | } | |
533 | ||
534 | rockchip_add_endpoints(dev, &match, port); | |
535 | of_node_put(port); | |
536 | } | |
537 | ||
538 | return component_master_add_with_match(dev, &rockchip_drm_ops, match); | |
539 | } | |
540 | ||
541 | static int rockchip_drm_platform_remove(struct platform_device *pdev) | |
542 | { | |
543 | component_master_del(&pdev->dev, &rockchip_drm_ops); | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | static const struct of_device_id rockchip_drm_dt_ids[] = { | |
549 | { .compatible = "rockchip,display-subsystem", }, | |
550 | { /* sentinel */ }, | |
551 | }; | |
552 | MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids); | |
553 | ||
554 | static struct platform_driver rockchip_drm_platform_driver = { | |
555 | .probe = rockchip_drm_platform_probe, | |
556 | .remove = rockchip_drm_platform_remove, | |
557 | .driver = { | |
2048e328 MY |
558 | .name = "rockchip-drm", |
559 | .of_match_table = rockchip_drm_dt_ids, | |
560 | .pm = &rockchip_drm_pm_ops, | |
561 | }, | |
562 | }; | |
563 | ||
564 | module_platform_driver(rockchip_drm_platform_driver); | |
565 | ||
566 | MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>"); | |
567 | MODULE_DESCRIPTION("ROCKCHIP DRM Driver"); | |
568 | MODULE_LICENSE("GPL v2"); |