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