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9#include <drm/drmP.h>
10#include <drm/drm_fb_helper.h>
11#include <drm/drm_gem_cma_helper.h>
12#include <drm/drm_of.h>
13#include <drm/drm_probe_helper.h>
14#include <linux/dma-mapping.h>
15#include <linux/dma-iommu.h>
16#include <linux/pm_runtime.h>
17#include <linux/module.h>
18#include <linux/of_graph.h>
19#include <linux/of_platform.h>
20#include <linux/component.h>
21#include <linux/console.h>
22#include <linux/iommu.h>
23
24#include "rockchip_drm_drv.h"
25#include "rockchip_drm_fb.h"
26#include "rockchip_drm_fbdev.h"
27#include "rockchip_drm_gem.h"
28
29#define DRIVER_NAME "rockchip"
30#define DRIVER_DESC "RockChip Soc DRM"
31#define DRIVER_DATE "20140818"
32#define DRIVER_MAJOR 1
33#define DRIVER_MINOR 0
34
35static bool is_support_iommu = true;
36static struct drm_driver rockchip_drm_driver;
37
38
39
40
41
42
43int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
44 struct device *dev)
45{
46 struct rockchip_drm_private *private = drm_dev->dev_private;
47 int ret;
48
49 if (!is_support_iommu)
50 return 0;
51
52 ret = iommu_attach_device(private->domain, dev);
53 if (ret) {
54 DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
55 return ret;
56 }
57
58 return 0;
59}
60
61void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
62 struct device *dev)
63{
64 struct rockchip_drm_private *private = drm_dev->dev_private;
65 struct iommu_domain *domain = private->domain;
66
67 if (!is_support_iommu)
68 return;
69
70 iommu_detach_device(domain, dev);
71}
72
73static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
74{
75 struct rockchip_drm_private *private = drm_dev->dev_private;
76 struct iommu_domain_geometry *geometry;
77 u64 start, end;
78
79 if (!is_support_iommu)
80 return 0;
81
82 private->domain = iommu_domain_alloc(&platform_bus_type);
83 if (!private->domain)
84 return -ENOMEM;
85
86 geometry = &private->domain->geometry;
87 start = geometry->aperture_start;
88 end = geometry->aperture_end;
89
90 DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
91 start, end);
92 drm_mm_init(&private->mm, start, end - start + 1);
93 mutex_init(&private->mm_lock);
94
95 return 0;
96}
97
98static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
99{
100 struct rockchip_drm_private *private = drm_dev->dev_private;
101
102 if (!is_support_iommu)
103 return;
104
105 drm_mm_takedown(&private->mm);
106 iommu_domain_free(private->domain);
107}
108
109static int rockchip_drm_bind(struct device *dev)
110{
111 struct drm_device *drm_dev;
112 struct rockchip_drm_private *private;
113 int ret;
114
115 drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
116 if (IS_ERR(drm_dev))
117 return PTR_ERR(drm_dev);
118
119 dev_set_drvdata(dev, drm_dev);
120
121 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
122 if (!private) {
123 ret = -ENOMEM;
124 goto err_free;
125 }
126
127 drm_dev->dev_private = private;
128
129 INIT_LIST_HEAD(&private->psr_list);
130 mutex_init(&private->psr_list_lock);
131
132 ret = rockchip_drm_init_iommu(drm_dev);
133 if (ret)
134 goto err_free;
135
136 drm_mode_config_init(drm_dev);
137
138 rockchip_drm_mode_config_init(drm_dev);
139
140
141 ret = component_bind_all(dev, drm_dev);
142 if (ret)
143 goto err_mode_config_cleanup;
144
145 ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
146 if (ret)
147 goto err_unbind_all;
148
149 drm_mode_config_reset(drm_dev);
150
151
152
153
154
155 drm_dev->irq_enabled = true;
156
157 ret = rockchip_drm_fbdev_init(drm_dev);
158 if (ret)
159 goto err_unbind_all;
160
161
162 drm_kms_helper_poll_init(drm_dev);
163
164 ret = drm_dev_register(drm_dev, 0);
165 if (ret)
166 goto err_kms_helper_poll_fini;
167
168 return 0;
169err_kms_helper_poll_fini:
170 drm_kms_helper_poll_fini(drm_dev);
171 rockchip_drm_fbdev_fini(drm_dev);
172err_unbind_all:
173 component_unbind_all(dev, drm_dev);
174err_mode_config_cleanup:
175 drm_mode_config_cleanup(drm_dev);
176 rockchip_iommu_cleanup(drm_dev);
177err_free:
178 drm_dev->dev_private = NULL;
179 dev_set_drvdata(dev, NULL);
180 drm_dev_put(drm_dev);
181 return ret;
182}
183
184static void rockchip_drm_unbind(struct device *dev)
185{
186 struct drm_device *drm_dev = dev_get_drvdata(dev);
187
188 drm_dev_unregister(drm_dev);
189
190 rockchip_drm_fbdev_fini(drm_dev);
191 drm_kms_helper_poll_fini(drm_dev);
192
193 drm_atomic_helper_shutdown(drm_dev);
194 component_unbind_all(dev, drm_dev);
195 drm_mode_config_cleanup(drm_dev);
196 rockchip_iommu_cleanup(drm_dev);
197
198 drm_dev->dev_private = NULL;
199 dev_set_drvdata(dev, NULL);
200 drm_dev_put(drm_dev);
201}
202
203static const struct file_operations rockchip_drm_driver_fops = {
204 .owner = THIS_MODULE,
205 .open = drm_open,
206 .mmap = rockchip_gem_mmap,
207 .poll = drm_poll,
208 .read = drm_read,
209 .unlocked_ioctl = drm_ioctl,
210 .compat_ioctl = drm_compat_ioctl,
211 .release = drm_release,
212};
213
214static struct drm_driver rockchip_drm_driver = {
215 .driver_features = DRIVER_MODESET | DRIVER_GEM |
216 DRIVER_PRIME | DRIVER_ATOMIC,
217 .lastclose = drm_fb_helper_lastclose,
218 .gem_vm_ops = &drm_gem_cma_vm_ops,
219 .gem_free_object_unlocked = rockchip_gem_free_object,
220 .dumb_create = rockchip_gem_dumb_create,
221 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
222 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
223 .gem_prime_import = drm_gem_prime_import,
224 .gem_prime_export = drm_gem_prime_export,
225 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
226 .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
227 .gem_prime_vmap = rockchip_gem_prime_vmap,
228 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
229 .gem_prime_mmap = rockchip_gem_mmap_buf,
230 .fops = &rockchip_drm_driver_fops,
231 .name = DRIVER_NAME,
232 .desc = DRIVER_DESC,
233 .date = DRIVER_DATE,
234 .major = DRIVER_MAJOR,
235 .minor = DRIVER_MINOR,
236};
237
238#ifdef CONFIG_PM_SLEEP
239static int rockchip_drm_sys_suspend(struct device *dev)
240{
241 struct drm_device *drm = dev_get_drvdata(dev);
242
243 return drm_mode_config_helper_suspend(drm);
244}
245
246static int rockchip_drm_sys_resume(struct device *dev)
247{
248 struct drm_device *drm = dev_get_drvdata(dev);
249
250 return drm_mode_config_helper_resume(drm);
251}
252#endif
253
254static const struct dev_pm_ops rockchip_drm_pm_ops = {
255 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
256 rockchip_drm_sys_resume)
257};
258
259#define MAX_ROCKCHIP_SUB_DRIVERS 16
260static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
261static int num_rockchip_sub_drivers;
262
263
264
265
266
267
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269
270
271
272
273int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
274{
275 struct device_node *node = of_graph_get_remote_port_parent(ep);
276 struct platform_device *pdev;
277 struct device_driver *drv;
278 int i;
279
280 if (!node)
281 return -ENODEV;
282
283
284 pdev = of_find_device_by_node(node);
285 of_node_put(node);
286 if (!pdev)
287 return -ENODEV;
288
289
290
291
292
293 drv = pdev->dev.driver;
294 if (!drv) {
295 platform_device_put(pdev);
296 return false;
297 }
298
299 for (i = 0; i < num_rockchip_sub_drivers; i++) {
300 if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
301 platform_device_put(pdev);
302 return true;
303 }
304 }
305
306 platform_device_put(pdev);
307 return false;
308}
309
310static int compare_dev(struct device *dev, void *data)
311{
312 return dev == (struct device *)data;
313}
314
315static void rockchip_drm_match_remove(struct device *dev)
316{
317 struct device_link *link;
318
319 list_for_each_entry(link, &dev->links.consumers, s_node)
320 device_link_del(link);
321}
322
323static struct component_match *rockchip_drm_match_add(struct device *dev)
324{
325 struct component_match *match = NULL;
326 int i;
327
328 for (i = 0; i < num_rockchip_sub_drivers; i++) {
329 struct platform_driver *drv = rockchip_sub_drivers[i];
330 struct device *p = NULL, *d;
331
332 do {
333 d = bus_find_device(&platform_bus_type, p, &drv->driver,
334 (void *)platform_bus_type.match);
335 put_device(p);
336 p = d;
337
338 if (!d)
339 break;
340
341 device_link_add(dev, d, DL_FLAG_STATELESS);
342 component_match_add(dev, &match, compare_dev, d);
343 } while (true);
344 }
345
346 if (IS_ERR(match))
347 rockchip_drm_match_remove(dev);
348
349 return match ?: ERR_PTR(-ENODEV);
350}
351
352static const struct component_master_ops rockchip_drm_ops = {
353 .bind = rockchip_drm_bind,
354 .unbind = rockchip_drm_unbind,
355};
356
357static int rockchip_drm_platform_of_probe(struct device *dev)
358{
359 struct device_node *np = dev->of_node;
360 struct device_node *port;
361 bool found = false;
362 int i;
363
364 if (!np)
365 return -ENODEV;
366
367 for (i = 0;; i++) {
368 struct device_node *iommu;
369
370 port = of_parse_phandle(np, "ports", i);
371 if (!port)
372 break;
373
374 if (!of_device_is_available(port->parent)) {
375 of_node_put(port);
376 continue;
377 }
378
379 iommu = of_parse_phandle(port->parent, "iommus", 0);
380 if (!iommu || !of_device_is_available(iommu->parent)) {
381 DRM_DEV_DEBUG(dev,
382 "no iommu attached for %pOF, using non-iommu buffers\n",
383 port->parent);
384
385
386
387
388 is_support_iommu = false;
389 }
390
391 found = true;
392
393 of_node_put(iommu);
394 of_node_put(port);
395 }
396
397 if (i == 0) {
398 DRM_DEV_ERROR(dev, "missing 'ports' property\n");
399 return -ENODEV;
400 }
401
402 if (!found) {
403 DRM_DEV_ERROR(dev,
404 "No available vop found for display-subsystem.\n");
405 return -ENODEV;
406 }
407
408 return 0;
409}
410
411static int rockchip_drm_platform_probe(struct platform_device *pdev)
412{
413 struct device *dev = &pdev->dev;
414 struct component_match *match = NULL;
415 int ret;
416
417 ret = rockchip_drm_platform_of_probe(dev);
418 if (ret)
419 return ret;
420
421 match = rockchip_drm_match_add(dev);
422 if (IS_ERR(match))
423 return PTR_ERR(match);
424
425 ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
426 if (ret < 0) {
427 rockchip_drm_match_remove(dev);
428 return ret;
429 }
430
431 return 0;
432}
433
434static int rockchip_drm_platform_remove(struct platform_device *pdev)
435{
436 component_master_del(&pdev->dev, &rockchip_drm_ops);
437
438 rockchip_drm_match_remove(&pdev->dev);
439
440 return 0;
441}
442
443static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
444{
445 struct drm_device *drm = platform_get_drvdata(pdev);
446
447 if (drm)
448 drm_atomic_helper_shutdown(drm);
449}
450
451static const struct of_device_id rockchip_drm_dt_ids[] = {
452 { .compatible = "rockchip,display-subsystem", },
453 { },
454};
455MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
456
457static struct platform_driver rockchip_drm_platform_driver = {
458 .probe = rockchip_drm_platform_probe,
459 .remove = rockchip_drm_platform_remove,
460 .shutdown = rockchip_drm_platform_shutdown,
461 .driver = {
462 .name = "rockchip-drm",
463 .of_match_table = rockchip_drm_dt_ids,
464 .pm = &rockchip_drm_pm_ops,
465 },
466};
467
468#define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
469 if (IS_ENABLED(cond) && \
470 !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
471 rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
472}
473
474static int __init rockchip_drm_init(void)
475{
476 int ret;
477
478 num_rockchip_sub_drivers = 0;
479 ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_DRM_ROCKCHIP);
480 ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
481 CONFIG_ROCKCHIP_LVDS);
482 ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
483 CONFIG_ROCKCHIP_ANALOGIX_DP);
484 ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
485 ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
486 CONFIG_ROCKCHIP_DW_HDMI);
487 ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
488 CONFIG_ROCKCHIP_DW_MIPI_DSI);
489 ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
490 ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
491 CONFIG_ROCKCHIP_RK3066_HDMI);
492
493 ret = platform_register_drivers(rockchip_sub_drivers,
494 num_rockchip_sub_drivers);
495 if (ret)
496 return ret;
497
498 ret = platform_driver_register(&rockchip_drm_platform_driver);
499 if (ret)
500 goto err_unreg_drivers;
501
502 return 0;
503
504err_unreg_drivers:
505 platform_unregister_drivers(rockchip_sub_drivers,
506 num_rockchip_sub_drivers);
507 return ret;
508}
509
510static void __exit rockchip_drm_fini(void)
511{
512 platform_driver_unregister(&rockchip_drm_platform_driver);
513
514 platform_unregister_drivers(rockchip_sub_drivers,
515 num_rockchip_sub_drivers);
516}
517
518module_init(rockchip_drm_init);
519module_exit(rockchip_drm_fini);
520
521MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
522MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
523MODULE_LICENSE("GPL v2");
524
