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