summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_drv.c
blob: b599f74692e5c60b79f933fc52f8201ff276e7ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
/*
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/pm_runtime.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>

#include <linux/component.h>

#include <drm/exynos_drm.h>

#include "exynos_drm_drv.h"
#include "exynos_drm_fbdev.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_plane.h"
#include "exynos_drm_ipp.h"
#include "exynos_drm_vidi.h"
#include "exynos_drm_g2d.h"
#include "exynos_drm_iommu.h"

#define DRIVER_NAME	"exynos"
#define DRIVER_DESC	"Samsung SoC DRM"
#define DRIVER_DATE	"20180330"

/*
 * Interface history:
 *
 * 1.0 - Original version
 * 1.1 - Upgrade IPP driver to version 2.0
 */
#define DRIVER_MAJOR	1
#define DRIVER_MINOR	1

static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
{
	struct drm_exynos_file_private *file_priv;
	int ret;

	file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
	if (!file_priv)
		return -ENOMEM;

	file->driver_priv = file_priv;
	ret = g2d_open(dev, file);
	if (ret)
		goto err_file_priv_free;

	return ret;

err_file_priv_free:
	kfree(file_priv);
	file->driver_priv = NULL;
	return ret;
}

static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
{
	g2d_close(dev, file);
	kfree(file->driver_priv);
	file->driver_priv = NULL;
}

static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
	.fault = exynos_drm_gem_fault,
	.open = drm_gem_vm_open,
	.close = drm_gem_vm_close,
};

static const struct drm_ioctl_desc exynos_ioctls[] = {
	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
			DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
			DRM_AUTH),
	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
			exynos_drm_ipp_get_res_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
			exynos_drm_ipp_get_limits_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
			DRM_AUTH | DRM_RENDER_ALLOW),
};

static const struct file_operations exynos_drm_driver_fops = {
	.owner		= THIS_MODULE,
	.open		= drm_open,
	.mmap		= exynos_drm_gem_mmap,
	.poll		= drm_poll,
	.read		= drm_read,
	.unlocked_ioctl	= drm_ioctl,
	.compat_ioctl = drm_compat_ioctl,
	.release	= drm_release,
};

static struct drm_driver exynos_drm_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
				  | DRIVER_ATOMIC | DRIVER_RENDER,
	.open			= exynos_drm_open,
	.lastclose		= drm_fb_helper_lastclose,
	.postclose		= exynos_drm_postclose,
	.gem_free_object_unlocked = exynos_drm_gem_free_object,
	.gem_vm_ops		= &exynos_drm_gem_vm_ops,
	.dumb_create		= exynos_drm_gem_dumb_create,
	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_export	= drm_gem_prime_export,
	.gem_prime_import	= exynos_drm_gem_prime_import,
	.gem_prime_get_sg_table	= exynos_drm_gem_prime_get_sg_table,
	.gem_prime_import_sg_table	= exynos_drm_gem_prime_import_sg_table,
	.gem_prime_vmap		= exynos_drm_gem_prime_vmap,
	.gem_prime_vunmap	= exynos_drm_gem_prime_vunmap,
	.gem_prime_mmap		= exynos_drm_gem_prime_mmap,
	.ioctls			= exynos_ioctls,
	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
	.fops			= &exynos_drm_driver_fops,
	.name	= DRIVER_NAME,
	.desc	= DRIVER_DESC,
	.date	= DRIVER_DATE,
	.major	= DRIVER_MAJOR,
	.minor	= DRIVER_MINOR,
};

static int exynos_drm_suspend(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);
	struct exynos_drm_private *private;

	if (!drm_dev)
		return 0;

	private = drm_dev->dev_private;

	drm_kms_helper_poll_disable(drm_dev);
	exynos_drm_fbdev_suspend(drm_dev);
	private->suspend_state = drm_atomic_helper_suspend(drm_dev);
	if (IS_ERR(private->suspend_state)) {
		exynos_drm_fbdev_resume(drm_dev);
		drm_kms_helper_poll_enable(drm_dev);
		return PTR_ERR(private->suspend_state);
	}

	return 0;
}

static void exynos_drm_resume(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);
	struct exynos_drm_private *private;

	if (!drm_dev)
		return;

	private = drm_dev->dev_private;
	drm_atomic_helper_resume(drm_dev, private->suspend_state);
	exynos_drm_fbdev_resume(drm_dev);
	drm_kms_helper_poll_enable(drm_dev);
}

static const struct dev_pm_ops exynos_drm_pm_ops = {
	.prepare = exynos_drm_suspend,
	.complete = exynos_drm_resume,
};

/* forward declaration */
static struct platform_driver exynos_drm_platform_driver;

struct exynos_drm_driver_info {
	struct platform_driver *driver;
	unsigned int flags;
};

#define DRM_COMPONENT_DRIVER	BIT(0)	/* supports component framework */
#define DRM_VIRTUAL_DEVICE	BIT(1)	/* create virtual platform device */
#define DRM_DMA_DEVICE		BIT(2)	/* can be used for dma allocations */
#define DRM_FIMC_DEVICE		BIT(3)	/* devices shared with V4L2 subsystem */

#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)

/*
 * Connector drivers should not be placed before associated crtc drivers,
 * because connector requires pipe number of its crtc during initialization.
 */
static struct exynos_drm_driver_info exynos_drm_drivers[] = {
	{
		DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
		DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
	}, {
		DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
		DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
	}, {
		DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
		DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
	}, {
		DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
		DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
	}, {
		DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
		DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
	}, {
		DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
		DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
	}, {
		DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
		DRM_COMPONENT_DRIVER
	}, {
		DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
		DRM_COMPONENT_DRIVER
	}, {
		&exynos_drm_platform_driver,
		DRM_VIRTUAL_DEVICE
	}
};

static int compare_dev(struct device *dev, void *data)
{
	return dev == (struct device *)data;
}

static struct component_match *exynos_drm_match_add(struct device *dev)
{
	struct component_match *match = NULL;
	int i;

	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
		struct device *p = NULL, *d;

		if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
			continue;

		while ((d = bus_find_device(&platform_bus_type, p,
					    &info->driver->driver,
					    (void *)platform_bus_type.match))) {
			put_device(p);

			if (!(info->flags & DRM_FIMC_DEVICE) ||
			    exynos_drm_check_fimc_device(d) == 0)
				component_match_add(dev, &match,
						    compare_dev, d);
			p = d;
		}
		put_device(p);
	}

	return match ?: ERR_PTR(-ENODEV);
}

static struct device *exynos_drm_get_dma_device(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
		struct device *dev;

		if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
			continue;

		while ((dev = bus_find_device(&platform_bus_type, NULL,
					    &info->driver->driver,
					    (void *)platform_bus_type.match))) {
			put_device(dev);
			return dev;
		}
	}
	return NULL;
}

static int exynos_drm_bind(struct device *dev)
{
	struct exynos_drm_private *private;
	struct drm_encoder *encoder;
	struct drm_device *drm;
	unsigned int clone_mask;
	int cnt, ret;

	drm = drm_dev_alloc(&exynos_drm_driver, dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
	if (!private) {
		ret = -ENOMEM;
		goto err_free_drm;
	}

	init_waitqueue_head(&private->wait);
	spin_lock_init(&private->lock);

	dev_set_drvdata(dev, drm);
	drm->dev_private = (void *)private;

	/* the first real CRTC device is used for all dma mapping operations */
	private->dma_dev = exynos_drm_get_dma_device();
	if (!private->dma_dev) {
		DRM_ERROR("no device found for DMA mapping operations.\n");
		ret = -ENODEV;
		goto err_free_private;
	}
	DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
		 dev_name(private->dma_dev));

	/* create common IOMMU mapping for all devices attached to Exynos DRM */
	ret = drm_create_iommu_mapping(drm);
	if (ret < 0) {
		DRM_ERROR("failed to create iommu mapping.\n");
		goto err_free_private;
	}

	drm_mode_config_init(drm);

	exynos_drm_mode_config_init(drm);

	/* setup possible_clones. */
	cnt = 0;
	clone_mask = 0;
	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
		clone_mask |= (1 << (cnt++));

	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
		encoder->possible_clones = clone_mask;

	/* Try to bind all sub drivers. */
	ret = component_bind_all(drm->dev, drm);
	if (ret)
		goto err_mode_config_cleanup;

	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (ret)
		goto err_unbind_all;

	drm_mode_config_reset(drm);

	/*
	 * enable drm irq mode.
	 * - with irq_enabled = true, we can use the vblank feature.
	 *
	 * P.S. note that we wouldn't use drm irq handler but
	 *	just specific driver own one instead because
	 *	drm framework supports only one irq handler.
	 */
	drm->irq_enabled = true;

	/* init kms poll for handling hpd */
	drm_kms_helper_poll_init(drm);

	ret = exynos_drm_fbdev_init(drm);
	if (ret)
		goto err_cleanup_poll;

	/* register the DRM device */
	ret = drm_dev_register(drm, 0);
	if (ret < 0)
		goto err_cleanup_fbdev;

	return 0;

err_cleanup_fbdev:
	exynos_drm_fbdev_fini(drm);
err_cleanup_poll:
	drm_kms_helper_poll_fini(drm);
err_unbind_all:
	component_unbind_all(drm->dev, drm);
err_mode_config_cleanup:
	drm_mode_config_cleanup(drm);
	drm_release_iommu_mapping(drm);
err_free_private:
	kfree(private);
err_free_drm:
	drm_dev_put(drm);

	return ret;
}

static void exynos_drm_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);

	drm_dev_unregister(drm);

	exynos_drm_fbdev_fini(drm);
	drm_kms_helper_poll_fini(drm);

	component_unbind_all(drm->dev, drm);
	drm_mode_config_cleanup(drm);
	drm_release_iommu_mapping(drm);

	kfree(drm->dev_private);
	drm->dev_private = NULL;
	dev_set_drvdata(dev, NULL);

	drm_dev_put(drm);
}

static const struct component_master_ops exynos_drm_ops = {
	.bind		= exynos_drm_bind,
	.unbind		= exynos_drm_unbind,
};

static int exynos_drm_platform_probe(struct platform_device *pdev)
{
	struct component_match *match;

	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

	match = exynos_drm_match_add(&pdev->dev);
	if (IS_ERR(match))
		return PTR_ERR(match);

	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
					       match);
}

static int exynos_drm_platform_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &exynos_drm_ops);
	return 0;
}

static struct platform_driver exynos_drm_platform_driver = {
	.probe	= exynos_drm_platform_probe,
	.remove	= exynos_drm_platform_remove,
	.driver	= {
		.name	= "exynos-drm",
		.pm	= &exynos_drm_pm_ops,
	},
};

static void exynos_drm_unregister_devices(void)
{
	int i;

	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
		struct device *dev;

		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
			continue;

		while ((dev = bus_find_device(&platform_bus_type, NULL,
					    &info->driver->driver,
					    (void *)platform_bus_type.match))) {
			put_device(dev);
			platform_device_unregister(to_platform_device(dev));
		}
	}
}

static int exynos_drm_register_devices(void)
{
	struct platform_device *pdev;
	int i;

	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];

		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
			continue;

		pdev = platform_device_register_simple(
					info->driver->driver.name, -1, NULL, 0);
		if (IS_ERR(pdev))
			goto fail;
	}

	return 0;
fail:
	exynos_drm_unregister_devices();
	return PTR_ERR(pdev);
}

static void exynos_drm_unregister_drivers(void)
{
	int i;

	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];

		if (!info->driver)
			continue;

		platform_driver_unregister(info->driver);
	}
}

static int exynos_drm_register_drivers(void)
{
	int i, ret;

	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];

		if (!info->driver)
			continue;

		ret = platform_driver_register(info->driver);
		if (ret)
			goto fail;
	}
	return 0;
fail:
	exynos_drm_unregister_drivers();
	return ret;
}

static int exynos_drm_init(void)
{
	int ret;

	ret = exynos_drm_register_devices();
	if (ret)
		return ret;

	ret = exynos_drm_register_drivers();
	if (ret)
		goto err_unregister_pdevs;

	return 0;

err_unregister_pdevs:
	exynos_drm_unregister_devices();

	return ret;
}

static void exynos_drm_exit(void)
{
	exynos_drm_unregister_drivers();
	exynos_drm_unregister_devices();
}

module_init(exynos_drm_init);
module_exit(exynos_drm_exit);

MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM Driver");
MODULE_LICENSE("GPL");