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_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
exynos_drm_open(struct drm_device * dev,struct drm_file * file)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
exynos_drm_postclose(struct drm_device * dev,struct drm_file * file)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
exynos_drm_suspend(struct device * dev)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
exynos_drm_resume(struct device * dev)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
exynos_drm_match_add(struct device * dev)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
exynos_drm_bind(struct device * dev)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 err_free_drm:
304 drm_dev_put(drm);
305
306 return ret;
307 }
308
exynos_drm_unbind(struct device * dev)309 static void exynos_drm_unbind(struct device *dev)
310 {
311 struct drm_device *drm = dev_get_drvdata(dev);
312
313 drm_dev_unregister(drm);
314
315 drm_kms_helper_poll_fini(drm);
316
317 component_unbind_all(drm->dev, drm);
318 drm_mode_config_cleanup(drm);
319 exynos_drm_cleanup_dma(drm);
320
321 kfree(drm->dev_private);
322 drm->dev_private = NULL;
323 dev_set_drvdata(dev, NULL);
324
325 drm_dev_put(drm);
326 }
327
328 static const struct component_master_ops exynos_drm_ops = {
329 .bind = exynos_drm_bind,
330 .unbind = exynos_drm_unbind,
331 };
332
exynos_drm_platform_probe(struct platform_device * pdev)333 static int exynos_drm_platform_probe(struct platform_device *pdev)
334 {
335 struct component_match *match;
336
337 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
338
339 match = exynos_drm_match_add(&pdev->dev);
340 if (IS_ERR(match))
341 return PTR_ERR(match);
342
343 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
344 match);
345 }
346
exynos_drm_platform_remove(struct platform_device * pdev)347 static int exynos_drm_platform_remove(struct platform_device *pdev)
348 {
349 component_master_del(&pdev->dev, &exynos_drm_ops);
350 return 0;
351 }
352
353 static struct platform_driver exynos_drm_platform_driver = {
354 .probe = exynos_drm_platform_probe,
355 .remove = exynos_drm_platform_remove,
356 .driver = {
357 .name = "exynos-drm",
358 .pm = &exynos_drm_pm_ops,
359 },
360 };
361
exynos_drm_unregister_devices(void)362 static void exynos_drm_unregister_devices(void)
363 {
364 int i;
365
366 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
367 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
368 struct device *dev;
369
370 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
371 continue;
372
373 while ((dev = platform_find_device_by_driver(NULL,
374 &info->driver->driver))) {
375 put_device(dev);
376 platform_device_unregister(to_platform_device(dev));
377 }
378 }
379 }
380
exynos_drm_register_devices(void)381 static int exynos_drm_register_devices(void)
382 {
383 struct platform_device *pdev;
384 int i;
385
386 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
387 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
388
389 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
390 continue;
391
392 pdev = platform_device_register_simple(
393 info->driver->driver.name, -1, NULL, 0);
394 if (IS_ERR(pdev))
395 goto fail;
396 }
397
398 return 0;
399 fail:
400 exynos_drm_unregister_devices();
401 return PTR_ERR(pdev);
402 }
403
exynos_drm_unregister_drivers(void)404 static void exynos_drm_unregister_drivers(void)
405 {
406 int i;
407
408 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
409 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
410
411 if (!info->driver)
412 continue;
413
414 platform_driver_unregister(info->driver);
415 }
416 }
417
exynos_drm_register_drivers(void)418 static int exynos_drm_register_drivers(void)
419 {
420 int i, ret;
421
422 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
423 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
424
425 if (!info->driver)
426 continue;
427
428 ret = platform_driver_register(info->driver);
429 if (ret)
430 goto fail;
431 }
432 return 0;
433 fail:
434 exynos_drm_unregister_drivers();
435 return ret;
436 }
437
exynos_drm_init(void)438 static int exynos_drm_init(void)
439 {
440 int ret;
441
442 if (drm_firmware_drivers_only())
443 return -ENODEV;
444
445 ret = exynos_drm_register_devices();
446 if (ret)
447 return ret;
448
449 ret = exynos_drm_register_drivers();
450 if (ret)
451 goto err_unregister_pdevs;
452
453 return 0;
454
455 err_unregister_pdevs:
456 exynos_drm_unregister_devices();
457
458 return ret;
459 }
460
exynos_drm_exit(void)461 static void exynos_drm_exit(void)
462 {
463 exynos_drm_unregister_drivers();
464 exynos_drm_unregister_devices();
465 }
466
467 module_init(exynos_drm_init);
468 module_exit(exynos_drm_exit);
469
470 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
471 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
472 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
473 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
474 MODULE_LICENSE("GPL");
475
