1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * Authors:
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
8 */
9
10 #include <linux/component.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/platform_device.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/uaccess.h>
15
16 #include <drm/drm_atomic.h>
17 #include <drm/drm_atomic_helper.h>
18 #include <drm/drm_drv.h>
19 #include <drm/drm_fb_helper.h>
20 #include <drm/drm_file.h>
21 #include <drm/drm_fourcc.h>
22 #include <drm/drm_ioctl.h>
23 #include <drm/drm_probe_helper.h>
24 #include <drm/drm_vblank.h>
25 #include <drm/exynos_drm.h>
26
27 #include "exynos_drm_drv.h"
28 #include "exynos_drm_fb.h"
29 #include "exynos_drm_fbdev.h"
30 #include "exynos_drm_g2d.h"
31 #include "exynos_drm_gem.h"
32 #include "exynos_drm_ipp.h"
33 #include "exynos_drm_plane.h"
34 #include "exynos_drm_vidi.h"
35
36 #define DRIVER_NAME "exynos"
37 #define DRIVER_DESC "Samsung SoC DRM"
38 #define DRIVER_DATE "20180330"
39
40 /*
41 * Interface history:
42 *
43 * 1.0 - Original version
44 * 1.1 - Upgrade IPP driver to version 2.0
45 */
46 #define DRIVER_MAJOR 1
47 #define DRIVER_MINOR 1
48
exynos_drm_open(struct drm_device * dev,struct drm_file * file)49 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
50 {
51 struct drm_exynos_file_private *file_priv;
52 int ret;
53
54 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
55 if (!file_priv)
56 return -ENOMEM;
57
58 file->driver_priv = file_priv;
59 ret = g2d_open(dev, file);
60 if (ret)
61 goto err_file_priv_free;
62
63 return ret;
64
65 err_file_priv_free:
66 kfree(file_priv);
67 file->driver_priv = NULL;
68 return ret;
69 }
70
exynos_drm_postclose(struct drm_device * dev,struct drm_file * file)71 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
72 {
73 g2d_close(dev, file);
74 kfree(file->driver_priv);
75 file->driver_priv = NULL;
76 }
77
78 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
79 .open = drm_gem_vm_open,
80 .close = drm_gem_vm_close,
81 };
82
83 static const struct drm_ioctl_desc exynos_ioctls[] = {
84 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
85 DRM_RENDER_ALLOW),
86 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
87 DRM_RENDER_ALLOW),
88 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
89 DRM_RENDER_ALLOW),
90 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
91 DRM_AUTH),
92 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
93 DRM_RENDER_ALLOW),
94 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
95 DRM_RENDER_ALLOW),
96 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
97 DRM_RENDER_ALLOW),
98 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
99 exynos_drm_ipp_get_res_ioctl,
100 DRM_RENDER_ALLOW),
101 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
102 DRM_RENDER_ALLOW),
103 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
104 exynos_drm_ipp_get_limits_ioctl,
105 DRM_RENDER_ALLOW),
106 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
107 DRM_RENDER_ALLOW),
108 };
109
110 static const struct file_operations exynos_drm_driver_fops = {
111 .owner = THIS_MODULE,
112 .open = drm_open,
113 .mmap = exynos_drm_gem_mmap,
114 .poll = drm_poll,
115 .read = drm_read,
116 .unlocked_ioctl = drm_ioctl,
117 .compat_ioctl = drm_compat_ioctl,
118 .release = drm_release,
119 };
120
121 static struct drm_driver exynos_drm_driver = {
122 .driver_features = DRIVER_MODESET | DRIVER_GEM
123 | DRIVER_ATOMIC | DRIVER_RENDER,
124 .open = exynos_drm_open,
125 .lastclose = drm_fb_helper_lastclose,
126 .postclose = exynos_drm_postclose,
127 .gem_free_object_unlocked = exynos_drm_gem_free_object,
128 .gem_vm_ops = &exynos_drm_gem_vm_ops,
129 .dumb_create = exynos_drm_gem_dumb_create,
130 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
131 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
132 .gem_prime_import = exynos_drm_gem_prime_import,
133 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
134 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
135 .gem_prime_vmap = exynos_drm_gem_prime_vmap,
136 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap,
137 .gem_prime_mmap = exynos_drm_gem_prime_mmap,
138 .ioctls = exynos_ioctls,
139 .num_ioctls = ARRAY_SIZE(exynos_ioctls),
140 .fops = &exynos_drm_driver_fops,
141 .name = DRIVER_NAME,
142 .desc = DRIVER_DESC,
143 .date = DRIVER_DATE,
144 .major = DRIVER_MAJOR,
145 .minor = DRIVER_MINOR,
146 };
147
exynos_drm_suspend(struct device * dev)148 static int exynos_drm_suspend(struct device *dev)
149 {
150 struct drm_device *drm_dev = dev_get_drvdata(dev);
151
152 return drm_mode_config_helper_suspend(drm_dev);
153 }
154
exynos_drm_resume(struct device * dev)155 static void exynos_drm_resume(struct device *dev)
156 {
157 struct drm_device *drm_dev = dev_get_drvdata(dev);
158
159 drm_mode_config_helper_resume(drm_dev);
160 }
161
162 static const struct dev_pm_ops exynos_drm_pm_ops = {
163 .prepare = exynos_drm_suspend,
164 .complete = exynos_drm_resume,
165 };
166
167 /* forward declaration */
168 static struct platform_driver exynos_drm_platform_driver;
169
170 struct exynos_drm_driver_info {
171 struct platform_driver *driver;
172 unsigned int flags;
173 };
174
175 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */
176 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */
177 #define DRM_FIMC_DEVICE BIT(2) /* devices shared with V4L2 subsystem */
178
179 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
180
181 /*
182 * Connector drivers should not be placed before associated crtc drivers,
183 * because connector requires pipe number of its crtc during initialization.
184 */
185 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
186 {
187 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
188 DRM_COMPONENT_DRIVER
189 }, {
190 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
191 DRM_COMPONENT_DRIVER
192 }, {
193 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
194 DRM_COMPONENT_DRIVER
195 }, {
196 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
197 DRM_COMPONENT_DRIVER
198 }, {
199 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
200 DRM_COMPONENT_DRIVER
201 }, {
202 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
203 DRM_COMPONENT_DRIVER
204 }, {
205 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
206 DRM_COMPONENT_DRIVER
207 }, {
208 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
209 DRM_COMPONENT_DRIVER
210 }, {
211 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
212 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
213 }, {
214 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
215 DRM_COMPONENT_DRIVER
216 }, {
217 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
218 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
219 }, {
220 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
221 DRM_COMPONENT_DRIVER
222 }, {
223 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
224 DRM_COMPONENT_DRIVER
225 }, {
226 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
227 DRM_COMPONENT_DRIVER
228 }, {
229 &exynos_drm_platform_driver,
230 DRM_VIRTUAL_DEVICE
231 }
232 };
233
compare_dev(struct device * dev,void * data)234 static int compare_dev(struct device *dev, void *data)
235 {
236 return dev == (struct device *)data;
237 }
238
exynos_drm_match_add(struct device * dev)239 static struct component_match *exynos_drm_match_add(struct device *dev)
240 {
241 struct component_match *match = NULL;
242 int i;
243
244 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
245 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
246 struct device *p = NULL, *d;
247
248 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
249 continue;
250
251 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
252 put_device(p);
253
254 if (!(info->flags & DRM_FIMC_DEVICE) ||
255 exynos_drm_check_fimc_device(d) == 0)
256 component_match_add(dev, &match,
257 compare_dev, d);
258 p = d;
259 }
260 put_device(p);
261 }
262
263 return match ?: ERR_PTR(-ENODEV);
264 }
265
exynos_drm_bind(struct device * dev)266 static int exynos_drm_bind(struct device *dev)
267 {
268 struct exynos_drm_private *private;
269 struct drm_encoder *encoder;
270 struct drm_device *drm;
271 unsigned int clone_mask;
272 int ret;
273
274 drm = drm_dev_alloc(&exynos_drm_driver, dev);
275 if (IS_ERR(drm))
276 return PTR_ERR(drm);
277
278 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
279 if (!private) {
280 ret = -ENOMEM;
281 goto err_free_drm;
282 }
283
284 init_waitqueue_head(&private->wait);
285 spin_lock_init(&private->lock);
286
287 dev_set_drvdata(dev, drm);
288 drm->dev_private = (void *)private;
289
290 drm_mode_config_init(drm);
291
292 exynos_drm_mode_config_init(drm);
293
294 /* setup possible_clones. */
295 clone_mask = 0;
296 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
297 clone_mask |= drm_encoder_mask(encoder);
298
299 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
300 encoder->possible_clones = clone_mask;
301
302 /* Try to bind all sub drivers. */
303 ret = component_bind_all(drm->dev, drm);
304 if (ret)
305 goto err_mode_config_cleanup;
306
307 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
308 if (ret)
309 goto err_unbind_all;
310
311 drm_mode_config_reset(drm);
312
313 /*
314 * enable drm irq mode.
315 * - with irq_enabled = true, we can use the vblank feature.
316 *
317 * P.S. note that we wouldn't use drm irq handler but
318 * just specific driver own one instead because
319 * drm framework supports only one irq handler.
320 */
321 drm->irq_enabled = true;
322
323 /* init kms poll for handling hpd */
324 drm_kms_helper_poll_init(drm);
325
326 ret = exynos_drm_fbdev_init(drm);
327 if (ret)
328 goto err_cleanup_poll;
329
330 /* register the DRM device */
331 ret = drm_dev_register(drm, 0);
332 if (ret < 0)
333 goto err_cleanup_fbdev;
334
335 return 0;
336
337 err_cleanup_fbdev:
338 exynos_drm_fbdev_fini(drm);
339 err_cleanup_poll:
340 drm_kms_helper_poll_fini(drm);
341 err_unbind_all:
342 component_unbind_all(drm->dev, drm);
343 err_mode_config_cleanup:
344 drm_mode_config_cleanup(drm);
345 exynos_drm_cleanup_dma(drm);
346 kfree(private);
347 dev_set_drvdata(dev, NULL);
348 err_free_drm:
349 drm_dev_put(drm);
350
351 return ret;
352 }
353
exynos_drm_unbind(struct device * dev)354 static void exynos_drm_unbind(struct device *dev)
355 {
356 struct drm_device *drm = dev_get_drvdata(dev);
357
358 drm_dev_unregister(drm);
359
360 exynos_drm_fbdev_fini(drm);
361 drm_kms_helper_poll_fini(drm);
362 drm_atomic_helper_shutdown(drm);
363
364 component_unbind_all(drm->dev, drm);
365 drm_mode_config_cleanup(drm);
366 exynos_drm_cleanup_dma(drm);
367
368 kfree(drm->dev_private);
369 drm->dev_private = NULL;
370 dev_set_drvdata(dev, NULL);
371
372 drm_dev_put(drm);
373 }
374
375 static const struct component_master_ops exynos_drm_ops = {
376 .bind = exynos_drm_bind,
377 .unbind = exynos_drm_unbind,
378 };
379
exynos_drm_platform_probe(struct platform_device * pdev)380 static int exynos_drm_platform_probe(struct platform_device *pdev)
381 {
382 struct component_match *match;
383
384 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
385
386 match = exynos_drm_match_add(&pdev->dev);
387 if (IS_ERR(match))
388 return PTR_ERR(match);
389
390 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
391 match);
392 }
393
exynos_drm_platform_remove(struct platform_device * pdev)394 static int exynos_drm_platform_remove(struct platform_device *pdev)
395 {
396 component_master_del(&pdev->dev, &exynos_drm_ops);
397 return 0;
398 }
399
exynos_drm_platform_shutdown(struct platform_device * pdev)400 static void exynos_drm_platform_shutdown(struct platform_device *pdev)
401 {
402 struct drm_device *drm = platform_get_drvdata(pdev);
403
404 if (drm)
405 drm_atomic_helper_shutdown(drm);
406 }
407
408 static struct platform_driver exynos_drm_platform_driver = {
409 .probe = exynos_drm_platform_probe,
410 .remove = exynos_drm_platform_remove,
411 .shutdown = exynos_drm_platform_shutdown,
412 .driver = {
413 .name = "exynos-drm",
414 .pm = &exynos_drm_pm_ops,
415 },
416 };
417
exynos_drm_unregister_devices(void)418 static void exynos_drm_unregister_devices(void)
419 {
420 int i;
421
422 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
423 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
424 struct device *dev;
425
426 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
427 continue;
428
429 while ((dev = platform_find_device_by_driver(NULL,
430 &info->driver->driver))) {
431 put_device(dev);
432 platform_device_unregister(to_platform_device(dev));
433 }
434 }
435 }
436
exynos_drm_register_devices(void)437 static int exynos_drm_register_devices(void)
438 {
439 struct platform_device *pdev;
440 int i;
441
442 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
443 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
444
445 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
446 continue;
447
448 pdev = platform_device_register_simple(
449 info->driver->driver.name, -1, NULL, 0);
450 if (IS_ERR(pdev))
451 goto fail;
452 }
453
454 return 0;
455 fail:
456 exynos_drm_unregister_devices();
457 return PTR_ERR(pdev);
458 }
459
exynos_drm_unregister_drivers(void)460 static void exynos_drm_unregister_drivers(void)
461 {
462 int i;
463
464 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
465 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
466
467 if (!info->driver)
468 continue;
469
470 platform_driver_unregister(info->driver);
471 }
472 }
473
exynos_drm_register_drivers(void)474 static int exynos_drm_register_drivers(void)
475 {
476 int i, ret;
477
478 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
479 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
480
481 if (!info->driver)
482 continue;
483
484 ret = platform_driver_register(info->driver);
485 if (ret)
486 goto fail;
487 }
488 return 0;
489 fail:
490 exynos_drm_unregister_drivers();
491 return ret;
492 }
493
exynos_drm_init(void)494 static int exynos_drm_init(void)
495 {
496 int ret;
497
498 ret = exynos_drm_register_devices();
499 if (ret)
500 return ret;
501
502 ret = exynos_drm_register_drivers();
503 if (ret)
504 goto err_unregister_pdevs;
505
506 return 0;
507
508 err_unregister_pdevs:
509 exynos_drm_unregister_devices();
510
511 return ret;
512 }
513
exynos_drm_exit(void)514 static void exynos_drm_exit(void)
515 {
516 exynos_drm_unregister_drivers();
517 exynos_drm_unregister_devices();
518 }
519
520 module_init(exynos_drm_init);
521 module_exit(exynos_drm_exit);
522
523 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
524 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
525 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
526 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
527 MODULE_LICENSE("GPL");
528