summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/mediatek/mtk_drm_drv.c
blob: 41d2cffe953e59f220eb53de2821583d6211e7bc (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
584
585
586
587
588
589
590
591
592
593
594
595
596
/*
 * Copyright (c) 2015 MediaTek Inc.
 * Author: YT SHEN <yt.shen@mediatek.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_of.h>
#include <linux/component.h>
#include <linux/iommu.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>

#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_drv.h"
#include "mtk_drm_fb.h"
#include "mtk_drm_gem.h"

#define DRIVER_NAME "mediatek"
#define DRIVER_DESC "Mediatek SoC DRM"
#define DRIVER_DATE "20150513"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0

static void mtk_atomic_schedule(struct mtk_drm_private *private,
				struct drm_atomic_state *state)
{
	private->commit.state = state;
	schedule_work(&private->commit.work);
}

static void mtk_atomic_wait_for_fences(struct drm_atomic_state *state)
{
	struct drm_plane *plane;
	struct drm_plane_state *plane_state;
	int i;

	for_each_plane_in_state(state, plane, plane_state, i)
		mtk_fb_wait(plane->state->fb);
}

static void mtk_atomic_complete(struct mtk_drm_private *private,
				struct drm_atomic_state *state)
{
	struct drm_device *drm = private->drm;

	mtk_atomic_wait_for_fences(state);

	/*
	 * Mediatek drm supports runtime PM, so plane registers cannot be
	 * written when their crtc is disabled.
	 *
	 * The comment for drm_atomic_helper_commit states:
	 *     For drivers supporting runtime PM the recommended sequence is
	 *
	 *     drm_atomic_helper_commit_modeset_disables(dev, state);
	 *     drm_atomic_helper_commit_modeset_enables(dev, state);
	 *     drm_atomic_helper_commit_planes(dev, state,
	 *                                     DRM_PLANE_COMMIT_ACTIVE_ONLY);
	 *
	 * See the kerneldoc entries for these three functions for more details.
	 */
	drm_atomic_helper_commit_modeset_disables(drm, state);
	drm_atomic_helper_commit_modeset_enables(drm, state);
	drm_atomic_helper_commit_planes(drm, state,
					DRM_PLANE_COMMIT_ACTIVE_ONLY);

	drm_atomic_helper_wait_for_vblanks(drm, state);

	drm_atomic_helper_cleanup_planes(drm, state);
	drm_atomic_state_put(state);
}

static void mtk_atomic_work(struct work_struct *work)
{
	struct mtk_drm_private *private = container_of(work,
			struct mtk_drm_private, commit.work);

	mtk_atomic_complete(private, private->commit.state);
}

static int mtk_atomic_commit(struct drm_device *drm,
			     struct drm_atomic_state *state,
			     bool async)
{
	struct mtk_drm_private *private = drm->dev_private;
	int ret;

	ret = drm_atomic_helper_prepare_planes(drm, state);
	if (ret)
		return ret;

	mutex_lock(&private->commit.lock);
	flush_work(&private->commit.work);

	drm_atomic_helper_swap_state(state, true);

	drm_atomic_state_get(state);
	if (async)
		mtk_atomic_schedule(private, state);
	else
		mtk_atomic_complete(private, state);

	mutex_unlock(&private->commit.lock);

	return 0;
}

static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
	.fb_create = mtk_drm_mode_fb_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = mtk_atomic_commit,
};

static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
	DDP_COMPONENT_OVL0,
	DDP_COMPONENT_RDMA0,
	DDP_COMPONENT_COLOR0,
	DDP_COMPONENT_BLS,
	DDP_COMPONENT_DSI0,
};

static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
	DDP_COMPONENT_RDMA1,
	DDP_COMPONENT_DPI0,
};

static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
	DDP_COMPONENT_OVL0,
	DDP_COMPONENT_COLOR0,
	DDP_COMPONENT_AAL,
	DDP_COMPONENT_OD,
	DDP_COMPONENT_RDMA0,
	DDP_COMPONENT_UFOE,
	DDP_COMPONENT_DSI0,
	DDP_COMPONENT_PWM0,
};

static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
	DDP_COMPONENT_OVL1,
	DDP_COMPONENT_COLOR1,
	DDP_COMPONENT_GAMMA,
	DDP_COMPONENT_RDMA1,
	DDP_COMPONENT_DPI0,
};

static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
	.main_path = mt2701_mtk_ddp_main,
	.main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
	.ext_path = mt2701_mtk_ddp_ext,
	.ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
	.shadow_register = true,
};

static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
	.main_path = mt8173_mtk_ddp_main,
	.main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
	.ext_path = mt8173_mtk_ddp_ext,
	.ext_len = ARRAY_SIZE(mt8173_mtk_ddp_ext),
};

static int mtk_drm_kms_init(struct drm_device *drm)
{
	struct mtk_drm_private *private = drm->dev_private;
	struct platform_device *pdev;
	struct device_node *np;
	int ret;

	if (!iommu_present(&platform_bus_type))
		return -EPROBE_DEFER;

	pdev = of_find_device_by_node(private->mutex_node);
	if (!pdev) {
		dev_err(drm->dev, "Waiting for disp-mutex device %s\n",
			private->mutex_node->full_name);
		of_node_put(private->mutex_node);
		return -EPROBE_DEFER;
	}
	private->mutex_dev = &pdev->dev;

	drm_mode_config_init(drm);

	drm->mode_config.min_width = 64;
	drm->mode_config.min_height = 64;

	/*
	 * set max width and height as default value(4096x4096).
	 * this value would be used to check framebuffer size limitation
	 * at drm_mode_addfb().
	 */
	drm->mode_config.max_width = 4096;
	drm->mode_config.max_height = 4096;
	drm->mode_config.funcs = &mtk_drm_mode_config_funcs;

	ret = component_bind_all(drm->dev, drm);
	if (ret)
		goto err_config_cleanup;

	/*
	 * We currently support two fixed data streams, each optional,
	 * and each statically assigned to a crtc:
	 * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
	 */
	ret = mtk_drm_crtc_create(drm, private->data->main_path,
				  private->data->main_len);
	if (ret < 0)
		goto err_component_unbind;
	/* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
	ret = mtk_drm_crtc_create(drm, private->data->ext_path,
				  private->data->ext_len);
	if (ret < 0)
		goto err_component_unbind;

	/* Use OVL device for all DMA memory allocations */
	np = private->comp_node[private->data->main_path[0]] ?:
	     private->comp_node[private->data->ext_path[0]];
	pdev = of_find_device_by_node(np);
	if (!pdev) {
		ret = -ENODEV;
		dev_err(drm->dev, "Need at least one OVL device\n");
		goto err_component_unbind;
	}

	private->dma_dev = &pdev->dev;

	/*
	 * We don't use the drm_irq_install() helpers provided by the DRM
	 * core, so we need to set this manually in order to allow the
	 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
	 */
	drm->irq_enabled = true;
	ret = drm_vblank_init(drm, MAX_CRTC);
	if (ret < 0)
		goto err_component_unbind;

	drm_kms_helper_poll_init(drm);
	drm_mode_config_reset(drm);

	return 0;

err_component_unbind:
	component_unbind_all(drm->dev, drm);
err_config_cleanup:
	drm_mode_config_cleanup(drm);

	return ret;
}

static void mtk_drm_kms_deinit(struct drm_device *drm)
{
	drm_kms_helper_poll_fini(drm);

	drm_vblank_cleanup(drm);
	component_unbind_all(drm->dev, drm);
	drm_mode_config_cleanup(drm);
}

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

static struct drm_driver mtk_drm_driver = {
	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
			   DRIVER_ATOMIC,

	.gem_free_object_unlocked = mtk_drm_gem_free_object,
	.gem_vm_ops = &drm_gem_cma_vm_ops,
	.dumb_create = mtk_drm_gem_dumb_create,
	.dumb_map_offset = mtk_drm_gem_dumb_map_offset,
	.dumb_destroy = drm_gem_dumb_destroy,

	.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 = drm_gem_prime_import,
	.gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
	.gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
	.gem_prime_mmap = mtk_drm_gem_mmap_buf,
	.fops = &mtk_drm_fops,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
};

static int compare_of(struct device *dev, void *data)
{
	return dev->of_node == data;
}

static int mtk_drm_bind(struct device *dev)
{
	struct mtk_drm_private *private = dev_get_drvdata(dev);
	struct drm_device *drm;
	int ret;

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

	drm->dev_private = private;
	private->drm = drm;

	ret = mtk_drm_kms_init(drm);
	if (ret < 0)
		goto err_free;

	ret = drm_dev_register(drm, 0);
	if (ret < 0)
		goto err_deinit;

	return 0;

err_deinit:
	mtk_drm_kms_deinit(drm);
err_free:
	drm_dev_unref(drm);
	return ret;
}

static void mtk_drm_unbind(struct device *dev)
{
	struct mtk_drm_private *private = dev_get_drvdata(dev);

	drm_dev_unregister(private->drm);
	drm_dev_unref(private->drm);
	private->drm = NULL;
}

static const struct component_master_ops mtk_drm_ops = {
	.bind		= mtk_drm_bind,
	.unbind		= mtk_drm_unbind,
};

static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
	{ .compatible = "mediatek,mt2701-disp-ovl",   .data = (void *)MTK_DISP_OVL },
	{ .compatible = "mediatek,mt8173-disp-ovl",   .data = (void *)MTK_DISP_OVL },
	{ .compatible = "mediatek,mt2701-disp-rdma",  .data = (void *)MTK_DISP_RDMA },
	{ .compatible = "mediatek,mt8173-disp-rdma",  .data = (void *)MTK_DISP_RDMA },
	{ .compatible = "mediatek,mt8173-disp-wdma",  .data = (void *)MTK_DISP_WDMA },
	{ .compatible = "mediatek,mt2701-disp-color", .data = (void *)MTK_DISP_COLOR },
	{ .compatible = "mediatek,mt8173-disp-color", .data = (void *)MTK_DISP_COLOR },
	{ .compatible = "mediatek,mt8173-disp-aal",   .data = (void *)MTK_DISP_AAL},
	{ .compatible = "mediatek,mt8173-disp-gamma", .data = (void *)MTK_DISP_GAMMA, },
	{ .compatible = "mediatek,mt8173-disp-ufoe",  .data = (void *)MTK_DISP_UFOE },
	{ .compatible = "mediatek,mt2701-dsi",	      .data = (void *)MTK_DSI },
	{ .compatible = "mediatek,mt8173-dsi",        .data = (void *)MTK_DSI },
	{ .compatible = "mediatek,mt8173-dpi",        .data = (void *)MTK_DPI },
	{ .compatible = "mediatek,mt2701-disp-mutex", .data = (void *)MTK_DISP_MUTEX },
	{ .compatible = "mediatek,mt8173-disp-mutex", .data = (void *)MTK_DISP_MUTEX },
	{ .compatible = "mediatek,mt2701-disp-pwm",   .data = (void *)MTK_DISP_BLS },
	{ .compatible = "mediatek,mt8173-disp-pwm",   .data = (void *)MTK_DISP_PWM },
	{ .compatible = "mediatek,mt8173-disp-od",    .data = (void *)MTK_DISP_OD },
	{ }
};

static int mtk_drm_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct mtk_drm_private *private;
	struct resource *mem;
	struct device_node *node;
	struct component_match *match = NULL;
	int ret;
	int i;

	private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
	if (!private)
		return -ENOMEM;

	mutex_init(&private->commit.lock);
	INIT_WORK(&private->commit.work, mtk_atomic_work);
	private->data = of_device_get_match_data(dev);

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	private->config_regs = devm_ioremap_resource(dev, mem);
	if (IS_ERR(private->config_regs)) {
		ret = PTR_ERR(private->config_regs);
		dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n",
			ret);
		return ret;
	}

	/* Iterate over sibling DISP function blocks */
	for_each_child_of_node(dev->of_node->parent, node) {
		const struct of_device_id *of_id;
		enum mtk_ddp_comp_type comp_type;
		int comp_id;

		of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
		if (!of_id)
			continue;

		if (!of_device_is_available(node)) {
			dev_dbg(dev, "Skipping disabled component %s\n",
				node->full_name);
			continue;
		}

		comp_type = (enum mtk_ddp_comp_type)of_id->data;

		if (comp_type == MTK_DISP_MUTEX) {
			private->mutex_node = of_node_get(node);
			continue;
		}

		comp_id = mtk_ddp_comp_get_id(node, comp_type);
		if (comp_id < 0) {
			dev_warn(dev, "Skipping unknown component %s\n",
				 node->full_name);
			continue;
		}

		private->comp_node[comp_id] = of_node_get(node);

		/*
		 * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
		 * separate component platform drivers and initialize their own
		 * DDP component structure. The others are initialized here.
		 */
		if (comp_type == MTK_DISP_COLOR ||
		    comp_type == MTK_DISP_OVL ||
		    comp_type == MTK_DISP_RDMA ||
		    comp_type == MTK_DSI ||
		    comp_type == MTK_DPI) {
			dev_info(dev, "Adding component match for %s\n",
				 node->full_name);
			drm_of_component_match_add(dev, &match, compare_of,
						   node);
		} else {
			struct mtk_ddp_comp *comp;

			comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
			if (!comp) {
				ret = -ENOMEM;
				goto err_node;
			}

			ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL);
			if (ret)
				goto err_node;

			private->ddp_comp[comp_id] = comp;
		}
	}

	if (!private->mutex_node) {
		dev_err(dev, "Failed to find disp-mutex node\n");
		ret = -ENODEV;
		goto err_node;
	}

	pm_runtime_enable(dev);

	platform_set_drvdata(pdev, private);

	ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
	if (ret)
		goto err_pm;

	return 0;

err_pm:
	pm_runtime_disable(dev);
err_node:
	of_node_put(private->mutex_node);
	for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
		of_node_put(private->comp_node[i]);
	return ret;
}

static int mtk_drm_remove(struct platform_device *pdev)
{
	struct mtk_drm_private *private = platform_get_drvdata(pdev);
	struct drm_device *drm = private->drm;
	int i;

	drm_dev_unregister(drm);
	mtk_drm_kms_deinit(drm);
	drm_dev_unref(drm);

	component_master_del(&pdev->dev, &mtk_drm_ops);
	pm_runtime_disable(&pdev->dev);
	of_node_put(private->mutex_node);
	for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
		of_node_put(private->comp_node[i]);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int mtk_drm_sys_suspend(struct device *dev)
{
	struct mtk_drm_private *private = dev_get_drvdata(dev);
	struct drm_device *drm = private->drm;

	drm_kms_helper_poll_disable(drm);

	private->suspend_state = drm_atomic_helper_suspend(drm);
	if (IS_ERR(private->suspend_state)) {
		drm_kms_helper_poll_enable(drm);
		return PTR_ERR(private->suspend_state);
	}

	DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n");
	return 0;
}

static int mtk_drm_sys_resume(struct device *dev)
{
	struct mtk_drm_private *private = dev_get_drvdata(dev);
	struct drm_device *drm = private->drm;

	drm_atomic_helper_resume(drm, private->suspend_state);
	drm_kms_helper_poll_enable(drm);

	DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n");
	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
			 mtk_drm_sys_resume);

static const struct of_device_id mtk_drm_of_ids[] = {
	{ .compatible = "mediatek,mt2701-mmsys",
	  .data = &mt2701_mmsys_driver_data},
	{ .compatible = "mediatek,mt8173-mmsys",
	  .data = &mt8173_mmsys_driver_data},
	{ }
};

static struct platform_driver mtk_drm_platform_driver = {
	.probe	= mtk_drm_probe,
	.remove	= mtk_drm_remove,
	.driver	= {
		.name	= "mediatek-drm",
		.of_match_table = mtk_drm_of_ids,
		.pm     = &mtk_drm_pm_ops,
	},
};

static struct platform_driver * const mtk_drm_drivers[] = {
	&mtk_ddp_driver,
	&mtk_disp_color_driver,
	&mtk_disp_ovl_driver,
	&mtk_disp_rdma_driver,
	&mtk_dpi_driver,
	&mtk_drm_platform_driver,
	&mtk_dsi_driver,
	&mtk_mipi_tx_driver,
};

static int __init mtk_drm_init(void)
{
	return platform_register_drivers(mtk_drm_drivers,
					 ARRAY_SIZE(mtk_drm_drivers));
}

static void __exit mtk_drm_exit(void)
{
	platform_unregister_drivers(mtk_drm_drivers,
				    ARRAY_SIZE(mtk_drm_drivers));
}

module_init(mtk_drm_init);
module_exit(mtk_drm_exit);

MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
MODULE_DESCRIPTION("Mediatek SoC DRM driver");
MODULE_LICENSE("GPL v2");