summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
blob: 813f9f8c86982eee793b53041d477459d9d7ff9e (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <mark.yao@rock-chips.com>
 *
 * based on exynos_drm_drv.c
 */

#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/component.h>
#include <linux/console.h>
#include <linux/iommu.h>

#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>

#if defined(CONFIG_ARM_DMA_USE_IOMMU)
#include <asm/dma-iommu.h>
#else
#define arm_iommu_detach_device(...)	({ })
#define arm_iommu_release_mapping(...)	({ })
#define to_dma_iommu_mapping(dev) NULL
#endif

#include "rockchip_drm_drv.h"
#include "rockchip_drm_fb.h"
#include "rockchip_drm_gem.h"

#define DRIVER_NAME	"rockchip"
#define DRIVER_DESC	"RockChip Soc DRM"
#define DRIVER_DATE	"20140818"
#define DRIVER_MAJOR	1
#define DRIVER_MINOR	0

static const struct drm_driver rockchip_drm_driver;

/*
 * Attach a (component) device to the shared drm dma mapping from master drm
 * device.  This is used by the VOPs to map GEM buffers to a common DMA
 * mapping.
 */
int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
				   struct device *dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;
	int ret;

	if (!private->domain)
		return 0;

	if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)) {
		struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);

		if (mapping) {
			arm_iommu_detach_device(dev);
			arm_iommu_release_mapping(mapping);
		}
	}

	ret = iommu_attach_device(private->domain, dev);
	if (ret) {
		DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
		return ret;
	}

	return 0;
}

void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
				    struct device *dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;

	if (!private->domain)
		return;

	iommu_detach_device(private->domain, dev);
}

void rockchip_drm_dma_init_device(struct drm_device *drm_dev,
				  struct device *dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;

	if (!device_iommu_mapped(dev))
		private->iommu_dev = ERR_PTR(-ENODEV);
	else if (!private->iommu_dev)
		private->iommu_dev = dev;
}

static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;
	struct iommu_domain_geometry *geometry;
	u64 start, end;

	if (IS_ERR_OR_NULL(private->iommu_dev))
		return 0;

	private->domain = iommu_domain_alloc(private->iommu_dev->bus);
	if (!private->domain)
		return -ENOMEM;

	geometry = &private->domain->geometry;
	start = geometry->aperture_start;
	end = geometry->aperture_end;

	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
		  start, end);
	drm_mm_init(&private->mm, start, end - start + 1);
	mutex_init(&private->mm_lock);

	return 0;
}

static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;

	if (!private->domain)
		return;

	drm_mm_takedown(&private->mm);
	iommu_domain_free(private->domain);
}

static int rockchip_drm_bind(struct device *dev)
{
	struct drm_device *drm_dev;
	struct rockchip_drm_private *private;
	int ret;

	/* Remove existing drivers that may own the framebuffer memory. */
	ret = drm_aperture_remove_framebuffers(false, &rockchip_drm_driver);
	if (ret) {
		DRM_DEV_ERROR(dev,
			      "Failed to remove existing framebuffers - %d.\n",
			      ret);
		return ret;
	}

	drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
	if (IS_ERR(drm_dev))
		return PTR_ERR(drm_dev);

	dev_set_drvdata(dev, drm_dev);

	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
	if (!private) {
		ret = -ENOMEM;
		goto err_free;
	}

	drm_dev->dev_private = private;

	ret = drmm_mode_config_init(drm_dev);
	if (ret)
		goto err_free;

	rockchip_drm_mode_config_init(drm_dev);

	/* Try to bind all sub drivers. */
	ret = component_bind_all(dev, drm_dev);
	if (ret)
		goto err_free;

	ret = rockchip_drm_init_iommu(drm_dev);
	if (ret)
		goto err_unbind_all;

	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
	if (ret)
		goto err_iommu_cleanup;

	drm_mode_config_reset(drm_dev);

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

	ret = drm_dev_register(drm_dev, 0);
	if (ret)
		goto err_kms_helper_poll_fini;

	drm_fbdev_generic_setup(drm_dev, 0);

	return 0;
err_kms_helper_poll_fini:
	drm_kms_helper_poll_fini(drm_dev);
err_iommu_cleanup:
	rockchip_iommu_cleanup(drm_dev);
err_unbind_all:
	component_unbind_all(dev, drm_dev);
err_free:
	drm_dev_put(drm_dev);
	return ret;
}

static void rockchip_drm_unbind(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);

	drm_dev_unregister(drm_dev);

	drm_kms_helper_poll_fini(drm_dev);

	drm_atomic_helper_shutdown(drm_dev);
	component_unbind_all(dev, drm_dev);
	rockchip_iommu_cleanup(drm_dev);

	drm_dev_put(drm_dev);
}

DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);

static const struct drm_driver rockchip_drm_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
	.dumb_create		= rockchip_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_import_sg_table	= rockchip_gem_prime_import_sg_table,
	.gem_prime_mmap		= drm_gem_prime_mmap,
	.fops			= &rockchip_drm_driver_fops,
	.name	= DRIVER_NAME,
	.desc	= DRIVER_DESC,
	.date	= DRIVER_DATE,
	.major	= DRIVER_MAJOR,
	.minor	= DRIVER_MINOR,
};

#ifdef CONFIG_PM_SLEEP
static int rockchip_drm_sys_suspend(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);

	return drm_mode_config_helper_suspend(drm);
}

static int rockchip_drm_sys_resume(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);

	return drm_mode_config_helper_resume(drm);
}
#endif

static const struct dev_pm_ops rockchip_drm_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
				rockchip_drm_sys_resume)
};

#define MAX_ROCKCHIP_SUB_DRIVERS 16
static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
static int num_rockchip_sub_drivers;

/*
 * Get the endpoint id of the remote endpoint of the given encoder. This
 * information is used by the VOP2 driver to identify the encoder.
 *
 * @rkencoder: The encoder to get the remote endpoint id from
 * @np: The encoder device node
 * @port: The number of the port leading to the VOP2
 * @reg: The endpoint number leading to the VOP2
 */
int rockchip_drm_encoder_set_crtc_endpoint_id(struct rockchip_encoder *rkencoder,
					      struct device_node *np, int port, int reg)
{
	struct of_endpoint ep;
	struct device_node *en, *ren;
	int ret;

	en = of_graph_get_endpoint_by_regs(np, port, reg);
	if (!en)
		return -ENOENT;

	ren = of_graph_get_remote_endpoint(en);
	if (!ren)
		return -ENOENT;

	ret = of_graph_parse_endpoint(ren, &ep);
	if (ret)
		return ret;

	rkencoder->crtc_endpoint_id = ep.id;

	return 0;
}

/*
 * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
 * Should be called from the component bind stage of the drivers
 * to ensure that all subdrivers are probed.
 *
 * @ep: endpoint of a rockchip vop
 *
 * returns true if subdriver, false if external bridge and -ENODEV
 * if remote port does not contain a device.
 */
int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
{
	struct device_node *node = of_graph_get_remote_port_parent(ep);
	struct platform_device *pdev;
	struct device_driver *drv;
	int i;

	if (!node)
		return -ENODEV;

	/* status disabled will prevent creation of platform-devices */
	if (!of_device_is_available(node)) {
		of_node_put(node);
		return -ENODEV;
	}

	pdev = of_find_device_by_node(node);
	of_node_put(node);

	/* enabled non-platform-devices can immediately return here */
	if (!pdev)
		return false;

	/*
	 * All rockchip subdrivers have probed at this point, so
	 * any device not having a driver now is an external bridge.
	 */
	drv = pdev->dev.driver;
	if (!drv) {
		platform_device_put(pdev);
		return false;
	}

	for (i = 0; i < num_rockchip_sub_drivers; i++) {
		if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
			platform_device_put(pdev);
			return true;
		}
	}

	platform_device_put(pdev);
	return false;
}

static void rockchip_drm_match_remove(struct device *dev)
{
	struct device_link *link;

	list_for_each_entry(link, &dev->links.consumers, s_node)
		device_link_del(link);
}

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

	for (i = 0; i < num_rockchip_sub_drivers; i++) {
		struct platform_driver *drv = rockchip_sub_drivers[i];
		struct device *p = NULL, *d;

		do {
			d = platform_find_device_by_driver(p, &drv->driver);
			put_device(p);
			p = d;

			if (!d)
				break;

			device_link_add(dev, d, DL_FLAG_STATELESS);
			component_match_add(dev, &match, component_compare_dev, d);
		} while (true);
	}

	if (IS_ERR(match))
		rockchip_drm_match_remove(dev);

	return match ?: ERR_PTR(-ENODEV);
}

static const struct component_master_ops rockchip_drm_ops = {
	.bind = rockchip_drm_bind,
	.unbind = rockchip_drm_unbind,
};

static int rockchip_drm_platform_of_probe(struct device *dev)
{
	struct device_node *np = dev->of_node;
	struct device_node *port;
	bool found = false;
	int i;

	if (!np)
		return -ENODEV;

	for (i = 0;; i++) {
		port = of_parse_phandle(np, "ports", i);
		if (!port)
			break;

		if (!of_device_is_available(port->parent)) {
			of_node_put(port);
			continue;
		}

		found = true;
		of_node_put(port);
	}

	if (i == 0) {
		DRM_DEV_ERROR(dev, "missing 'ports' property\n");
		return -ENODEV;
	}

	if (!found) {
		DRM_DEV_ERROR(dev,
			      "No available vop found for display-subsystem.\n");
		return -ENODEV;
	}

	return 0;
}

static int rockchip_drm_platform_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct component_match *match = NULL;
	int ret;

	ret = rockchip_drm_platform_of_probe(dev);
	if (ret)
		return ret;

	match = rockchip_drm_match_add(dev);
	if (IS_ERR(match))
		return PTR_ERR(match);

	ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
	if (ret < 0) {
		rockchip_drm_match_remove(dev);
		return ret;
	}

	return 0;
}

static int rockchip_drm_platform_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &rockchip_drm_ops);

	rockchip_drm_match_remove(&pdev->dev);

	return 0;
}

static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
{
	struct drm_device *drm = platform_get_drvdata(pdev);

	if (drm)
		drm_atomic_helper_shutdown(drm);
}

static const struct of_device_id rockchip_drm_dt_ids[] = {
	{ .compatible = "rockchip,display-subsystem", },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);

static struct platform_driver rockchip_drm_platform_driver = {
	.probe = rockchip_drm_platform_probe,
	.remove = rockchip_drm_platform_remove,
	.shutdown = rockchip_drm_platform_shutdown,
	.driver = {
		.name = "rockchip-drm",
		.of_match_table = rockchip_drm_dt_ids,
		.pm = &rockchip_drm_pm_ops,
	},
};

#define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
	if (IS_ENABLED(cond) && \
	    !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
		rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
}

static int __init rockchip_drm_init(void)
{
	int ret;

	if (drm_firmware_drivers_only())
		return -ENODEV;

	num_rockchip_sub_drivers = 0;
	ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_ROCKCHIP_VOP);
	ADD_ROCKCHIP_SUB_DRIVER(vop2_platform_driver, CONFIG_ROCKCHIP_VOP2);
	ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
				CONFIG_ROCKCHIP_LVDS);
	ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
				CONFIG_ROCKCHIP_ANALOGIX_DP);
	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
				CONFIG_ROCKCHIP_DW_HDMI);
	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
				CONFIG_ROCKCHIP_DW_MIPI_DSI);
	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
	ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
				CONFIG_ROCKCHIP_RK3066_HDMI);

	ret = platform_register_drivers(rockchip_sub_drivers,
					num_rockchip_sub_drivers);
	if (ret)
		return ret;

	ret = platform_driver_register(&rockchip_drm_platform_driver);
	if (ret)
		goto err_unreg_drivers;

	return 0;

err_unreg_drivers:
	platform_unregister_drivers(rockchip_sub_drivers,
				    num_rockchip_sub_drivers);
	return ret;
}

static void __exit rockchip_drm_fini(void)
{
	platform_driver_unregister(&rockchip_drm_platform_driver);

	platform_unregister_drivers(rockchip_sub_drivers,
				    num_rockchip_sub_drivers);
}

module_init(rockchip_drm_init);
module_exit(rockchip_drm_fini);

MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
MODULE_LICENSE("GPL v2");