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