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