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