summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/armada/armada_drv.c
blob: 1cfabcd6a629d68ec586fdc9a9ef8d9841d39178 (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
/*
 * 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/drm_atomic_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_of.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_gem.h"
#include "armada_fb.h"
#include "armada_hw.h"
#include <drm/armada_drm.h>
#include "armada_ioctlP.h"

static struct drm_ioctl_desc armada_ioctls[] = {
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
};

DEFINE_DRM_GEM_FOPS(armada_drm_fops);

static struct drm_driver armada_drm_driver = {
	.lastclose		= drm_fb_helper_lastclose,
	.gem_free_object_unlocked = 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,
	.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_PRIME | DRIVER_ATOMIC,
	.ioctls			= armada_ioctls,
	.fops			= &armada_drm_fops,
};

static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
	.fb_create		= armada_fb_create,
	.output_poll_changed	= drm_fb_helper_output_poll_changed,
	.atomic_check		= drm_atomic_helper_check,
	.atomic_commit		= drm_atomic_helper_commit,
};

static int armada_drm_bind(struct device *dev)
{
	struct armada_private *priv;
	struct resource *mem = NULL;
	int ret, n;

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

		/* Resources above 64K are graphics memory */
		if (resource_size(r) > SZ_64K)
			mem = r;
		else
			return -EINVAL;
	}

	if (!mem)
		return -ENXIO;

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

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

	/*
	 * The drm_device structure must be at the start of
	 * armada_private for drm_dev_put() to work correctly.
	 */
	BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);

	ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
	if (ret) {
		dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
			__func__, ret);
		kfree(priv);
		return ret;
	}

	/* Remove early framebuffers */
	ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
							    "armada-drm-fb",
							    false);
	if (ret) {
		dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
			__func__, ret);
		kfree(priv);
		return ret;
	}

	priv->drm.dev_private = priv;

	dev_set_drvdata(dev, &priv->drm);

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

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

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

	ret = component_bind_all(dev, &priv->drm);
	if (ret)
		goto err_kms;

	ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
	if (ret)
		goto err_comp;

	priv->drm.irq_enabled = true;

	drm_mode_config_reset(&priv->drm);

	ret = armada_fbdev_init(&priv->drm);
	if (ret)
		goto err_comp;

	drm_kms_helper_poll_init(&priv->drm);

	ret = drm_dev_register(&priv->drm, 0);
	if (ret)
		goto err_poll;

#ifdef CONFIG_DEBUG_FS
	armada_drm_debugfs_init(priv->drm.primary);
#endif

	return 0;

 err_poll:
	drm_kms_helper_poll_fini(&priv->drm);
	armada_fbdev_fini(&priv->drm);
 err_comp:
	component_unbind_all(dev, &priv->drm);
 err_kms:
	drm_mode_config_cleanup(&priv->drm);
	drm_mm_takedown(&priv->linear);
	drm_dev_put(&priv->drm);
	return ret;
}

static void armada_drm_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct armada_private *priv = drm->dev_private;

	drm_kms_helper_poll_fini(&priv->drm);
	armada_fbdev_fini(&priv->drm);

	drm_dev_unregister(&priv->drm);

	drm_atomic_helper_shutdown(&priv->drm);

	component_unbind_all(dev, &priv->drm);

	drm_mode_config_cleanup(&priv->drm);
	drm_mm_takedown(&priv->linear);

	drm_dev_put(&priv->drm);
}

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 *dev_node)
{
	struct device_node *ep, *remote;

	for_each_endpoint_of_node(dev_node, 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 %pOF is not available\n",
				 remote);
			of_node_put(remote);
			continue;
		}

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

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

	ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
	if (ret != -EINVAL)
		return ret;

	if (dev->platform_data) {
		char **devices = dev->platform_data;
		struct device *d;
		int i;

		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)
				armada_add_endpoints(dev, &match, d->of_node);
			put_device(d);
		}
	}

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

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

static const struct platform_device_id armada_drm_platform_ids[] = {
	{
		.name		= "armada-drm",
	}, {
		.name		= "armada-510-drm",
	},
	{ },
};
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");