summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/armada/armada_drv.c
blob: 225034b74cda7554cb6e8597c844dd77aa36558a (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
/*
 * Copyright (C) 2012 Russell King
 *
 * 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.
 */
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_gem.h"
#include "armada_hw.h"
#include <drm/armada_drm.h>
#include "armada_ioctlP.h"

#ifdef CONFIG_DRM_ARMADA_TDA1998X
#include <drm/i2c/tda998x.h>
#include "armada_slave.h"

static struct tda998x_encoder_params params = {
	/* With 0x24, there is no translation between vp_out and int_vp
	FB	LCD out	Pins	VIP	Int Vp
	R:23:16	R:7:0	VPC7:0	7:0	7:0[R]
	G:15:8	G:15:8	VPB7:0	23:16	23:16[G]
	B:7:0	B:23:16	VPA7:0	15:8	15:8[B]
	*/
	.swap_a = 2,
	.swap_b = 3,
	.swap_c = 4,
	.swap_d = 5,
	.swap_e = 0,
	.swap_f = 1,
	.audio_cfg = BIT(2),
	.audio_frame[1] = 1,
	.audio_format = AFMT_SPDIF,
	.audio_sample_rate = 44100,
};

static const struct armada_drm_slave_config tda19988_config = {
	.i2c_adapter_id = 0,
	.crtcs = 1 << 0, /* Only LCD0 at the moment */
	.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
	.interlace_allowed = true,
	.info = {
		.type = "tda998x",
		.addr = 0x70,
		.platform_data = &params,
	},
};
#endif

static bool is_componentized(struct device *dev)
{
	return dev->of_node || dev->platform_data;
}

static void armada_drm_unref_work(struct work_struct *work)
{
	struct armada_private *priv =
		container_of(work, struct armada_private, fb_unref_work);
	struct drm_framebuffer *fb;

	while (kfifo_get(&priv->fb_unref, &fb))
		drm_framebuffer_unreference(fb);
}

/* Must be called with dev->event_lock held */
void __armada_drm_queue_unref_work(struct drm_device *dev,
	struct drm_framebuffer *fb)
{
	struct armada_private *priv = dev->dev_private;

	WARN_ON(!kfifo_put(&priv->fb_unref, fb));
	schedule_work(&priv->fb_unref_work);
}

void armada_drm_queue_unref_work(struct drm_device *dev,
	struct drm_framebuffer *fb)
{
	unsigned long flags;

	spin_lock_irqsave(&dev->event_lock, flags);
	__armada_drm_queue_unref_work(dev, fb);
	spin_unlock_irqrestore(&dev->event_lock, flags);
}

static int armada_drm_load(struct drm_device *dev, unsigned long flags)
{
	const struct platform_device_id *id;
	const struct armada_variant *variant;
	struct armada_private *priv;
	struct resource *res[ARRAY_SIZE(priv->dcrtc)];
	struct resource *mem = NULL;
	int ret, n, i;

	memset(res, 0, sizeof(res));

	for (n = i = 0; ; n++) {
		struct resource *r = platform_get_resource(dev->platformdev,
							   IORESOURCE_MEM, n);
		if (!r)
			break;

		/* Resources above 64K are graphics memory */
		if (resource_size(r) > SZ_64K)
			mem = r;
		else if (i < ARRAY_SIZE(priv->dcrtc))
			res[i++] = r;
		else
			return -EINVAL;
	}

	if (!mem)
		return -ENXIO;

	if (!devm_request_mem_region(dev->dev, mem->start,
			resource_size(mem), "armada-drm"))
		return -EBUSY;

	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		DRM_ERROR("failed to allocate private\n");
		return -ENOMEM;
	}

	platform_set_drvdata(dev->platformdev, dev);
	dev->dev_private = priv;

	/* Get the implementation specific driver data. */
	id = platform_get_device_id(dev->platformdev);
	if (!id)
		return -ENXIO;

	variant = (const struct armada_variant *)id->driver_data;

	INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
	INIT_KFIFO(priv->fb_unref);

	/* Mode setting support */
	drm_mode_config_init(dev);
	dev->mode_config.min_width = 320;
	dev->mode_config.min_height = 200;

	/*
	 * With vscale enabled, the maximum width is 1920 due to the
	 * 1920 by 3 lines RAM
	 */
	dev->mode_config.max_width = 1920;
	dev->mode_config.max_height = 2048;

	dev->mode_config.preferred_depth = 24;
	dev->mode_config.funcs = &armada_drm_mode_config_funcs;
	drm_mm_init(&priv->linear, mem->start, resource_size(mem));

	/* Create all LCD controllers */
	for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
		int irq;

		if (!res[n])
			break;

		irq = platform_get_irq(dev->platformdev, n);
		if (irq < 0)
			goto err_kms;

		ret = armada_drm_crtc_create(dev, dev->dev, res[n], irq,
					     variant, NULL);
		if (ret)
			goto err_kms;
	}

	if (is_componentized(dev->dev)) {
		ret = component_bind_all(dev->dev, dev);
		if (ret)
			goto err_kms;
	} else {
#ifdef CONFIG_DRM_ARMADA_TDA1998X
		ret = armada_drm_connector_slave_create(dev, &tda19988_config);
		if (ret)
			goto err_kms;
#endif
	}

	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
	if (ret)
		goto err_comp;

	dev->irq_enabled = true;
	dev->vblank_disable_allowed = 1;

	ret = armada_fbdev_init(dev);
	if (ret)
		goto err_comp;

	drm_kms_helper_poll_init(dev);

	return 0;

 err_comp:
	if (is_componentized(dev->dev))
		component_unbind_all(dev->dev, dev);
 err_kms:
	drm_mode_config_cleanup(dev);
	drm_mm_takedown(&priv->linear);
	flush_work(&priv->fb_unref_work);

	return ret;
}

static int armada_drm_unload(struct drm_device *dev)
{
	struct armada_private *priv = dev->dev_private;

	drm_kms_helper_poll_fini(dev);
	armada_fbdev_fini(dev);

	if (is_componentized(dev->dev))
		component_unbind_all(dev->dev, dev);

	drm_mode_config_cleanup(dev);
	drm_mm_takedown(&priv->linear);
	flush_work(&priv->fb_unref_work);
	dev->dev_private = NULL;

	return 0;
}

void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
	struct armada_vbl_event *evt)
{
	unsigned long flags;

	spin_lock_irqsave(&dcrtc->irq_lock, flags);
	if (list_empty(&evt->node)) {
		list_add_tail(&evt->node, &dcrtc->vbl_list);

		drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
	}
	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
}

void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
	struct armada_vbl_event *evt)
{
	if (!list_empty(&evt->node)) {
		list_del_init(&evt->node);
		drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
	}
}

/* These are called under the vbl_lock. */
static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
{
	struct armada_private *priv = dev->dev_private;
	armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
	return 0;
}

static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
{
	struct armada_private *priv = dev->dev_private;
	armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
}

static struct drm_ioctl_desc armada_ioctls[] = {
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
		DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
		DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
		DRM_UNLOCKED),
};

static void armada_drm_lastclose(struct drm_device *dev)
{
	armada_fbdev_lastclose(dev);
}

static const struct file_operations armada_drm_fops = {
	.owner			= THIS_MODULE,
	.llseek			= no_llseek,
	.read			= drm_read,
	.poll			= drm_poll,
	.unlocked_ioctl		= drm_ioctl,
	.mmap			= drm_gem_mmap,
	.open			= drm_open,
	.release		= drm_release,
};

static struct drm_driver armada_drm_driver = {
	.load			= armada_drm_load,
	.open			= NULL,
	.preclose		= NULL,
	.postclose		= NULL,
	.lastclose		= armada_drm_lastclose,
	.unload			= armada_drm_unload,
	.set_busid		= drm_platform_set_busid,
	.get_vblank_counter	= drm_vblank_count,
	.enable_vblank		= armada_drm_enable_vblank,
	.disable_vblank		= armada_drm_disable_vblank,
#ifdef CONFIG_DEBUG_FS
	.debugfs_init		= armada_drm_debugfs_init,
	.debugfs_cleanup	= armada_drm_debugfs_cleanup,
#endif
	.gem_free_object	= armada_gem_free_object,
	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_export	= armada_gem_prime_export,
	.gem_prime_import	= armada_gem_prime_import,
	.dumb_create		= armada_gem_dumb_create,
	.dumb_map_offset	= armada_gem_dumb_map_offset,
	.dumb_destroy		= armada_gem_dumb_destroy,
	.gem_vm_ops		= &armada_gem_vm_ops,
	.major			= 1,
	.minor			= 0,
	.name			= "armada-drm",
	.desc			= "Armada SoC DRM",
	.date			= "20120730",
	.driver_features	= DRIVER_GEM | DRIVER_MODESET |
				  DRIVER_HAVE_IRQ | DRIVER_PRIME,
	.ioctls			= armada_ioctls,
	.fops			= &armada_drm_fops,
};

static int armada_drm_bind(struct device *dev)
{
	return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
}

static void armada_drm_unbind(struct device *dev)
{
	drm_put_dev(dev_get_drvdata(dev));
}

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

static int compare_dev_name(struct device *dev, void *data)
{
	const char *name = data;
	return !strcmp(dev_name(dev), name);
}

static void armada_add_endpoints(struct device *dev,
	struct component_match **match, struct device_node *port)
{
	struct device_node *ep, *remote;

	for_each_child_of_node(port, ep) {
		remote = of_graph_get_remote_port_parent(ep);
		if (!remote || !of_device_is_available(remote)) {
			of_node_put(remote);
			continue;
		} else if (!of_device_is_available(remote->parent)) {
			dev_warn(dev, "parent device of %s is not available\n",
				 remote->full_name);
			of_node_put(remote);
			continue;
		}

		component_match_add(dev, match, compare_of, remote);
		of_node_put(remote);
	}
}

static int armada_drm_find_components(struct device *dev,
	struct component_match **match)
{
	struct device_node *port;
	int i;

	if (dev->of_node) {
		struct device_node *np = dev->of_node;

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

			component_match_add(dev, match, compare_of, port);
			of_node_put(port);
		}

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

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

			armada_add_endpoints(dev, match, port);
			of_node_put(port);
		}
	} else if (dev->platform_data) {
		char **devices = dev->platform_data;
		struct device *d;

		for (i = 0; devices[i]; i++)
			component_match_add(dev, match, compare_dev_name,
					    devices[i]);

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

		for (i = 0; devices[i]; i++) {
			d = bus_find_device_by_name(&platform_bus_type, NULL,
					devices[i]);
			if (d && d->of_node) {
				for_each_child_of_node(d->of_node, port)
					armada_add_endpoints(dev, match, port);
			}
			put_device(d);
		}
	}

	return 0;
}

static const struct component_master_ops armada_master_ops = {
	.bind = armada_drm_bind,
	.unbind = armada_drm_unbind,
};

static int armada_drm_probe(struct platform_device *pdev)
{
	if (is_componentized(&pdev->dev)) {
		struct component_match *match = NULL;
		int ret;

		ret = armada_drm_find_components(&pdev->dev, &match);
		if (ret < 0)
			return ret;

		return component_master_add_with_match(&pdev->dev,
				&armada_master_ops, match);
	} else {
		return drm_platform_init(&armada_drm_driver, pdev);
	}
}

static int armada_drm_remove(struct platform_device *pdev)
{
	if (is_componentized(&pdev->dev))
		component_master_del(&pdev->dev, &armada_master_ops);
	else
		drm_put_dev(platform_get_drvdata(pdev));
	return 0;
}

static const struct platform_device_id armada_drm_platform_ids[] = {
	{
		.name		= "armada-drm",
		.driver_data	= (unsigned long)&armada510_ops,
	}, {
		.name		= "armada-510-drm",
		.driver_data	= (unsigned long)&armada510_ops,
	},
	{ },
};
MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);

static struct platform_driver armada_drm_platform_driver = {
	.probe	= armada_drm_probe,
	.remove	= armada_drm_remove,
	.driver	= {
		.name	= "armada-drm",
	},
	.id_table = armada_drm_platform_ids,
};

static int __init armada_drm_init(void)
{
	int ret;

	armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);

	ret = platform_driver_register(&armada_lcd_platform_driver);
	if (ret)
		return ret;
	ret = platform_driver_register(&armada_drm_platform_driver);
	if (ret)
		platform_driver_unregister(&armada_lcd_platform_driver);
	return ret;
}
module_init(armada_drm_init);

static void __exit armada_drm_exit(void)
{
	platform_driver_unregister(&armada_drm_platform_driver);
	platform_driver_unregister(&armada_lcd_platform_driver);
}
module_exit(armada_drm_exit);

MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
MODULE_DESCRIPTION("Armada DRM Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:armada-drm");
OpenPOWER on IntegriCloud