summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/arc/arcpgu_drv.c
blob: 1926b200e4cb3eade1178ec27fd95fd453f6d8b4 (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
/*
 * ARC PGU DRM driver.
 *
 * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.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 <linux/clk.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_atomic_helper.h>
#include <linux/of_reserved_mem.h>

#include "arcpgu.h"
#include "arcpgu_regs.h"

static void arcpgu_fb_output_poll_changed(struct drm_device *dev)
{
	struct arcpgu_drm_private *arcpgu = dev->dev_private;

	drm_fbdev_cma_hotplug_event(arcpgu->fbdev);
}

static struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
	.fb_create  = drm_fb_cma_create,
	.output_poll_changed = arcpgu_fb_output_poll_changed,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static void arcpgu_setup_mode_config(struct drm_device *drm)
{
	drm_mode_config_init(drm);
	drm->mode_config.min_width = 0;
	drm->mode_config.min_height = 0;
	drm->mode_config.max_width = 1920;
	drm->mode_config.max_height = 1080;
	drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
}

static int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma)
{
	int ret;

	ret = drm_gem_mmap(filp, vma);
	if (ret)
		return ret;

	vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
	return 0;
}

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

static void arcpgu_lastclose(struct drm_device *drm)
{
	struct arcpgu_drm_private *arcpgu = drm->dev_private;

	drm_fbdev_cma_restore_mode(arcpgu->fbdev);
}

static int arcpgu_load(struct drm_device *drm)
{
	struct platform_device *pdev = to_platform_device(drm->dev);
	struct arcpgu_drm_private *arcpgu;
	struct device_node *encoder_node;
	struct resource *res;
	int ret;

	arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
	if (arcpgu == NULL)
		return -ENOMEM;

	drm->dev_private = arcpgu;

	arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
	if (IS_ERR(arcpgu->clk))
		return PTR_ERR(arcpgu->clk);

	arcpgu_setup_mode_config(drm);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(arcpgu->regs))
		return PTR_ERR(arcpgu->regs);

	dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
		 arc_pgu_read(arcpgu, ARCPGU_REG_ID));

	/* Get the optional framebuffer memory resource */
	ret = of_reserved_mem_device_init(drm->dev);
	if (ret && ret != -ENODEV)
		return ret;

	if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
		return -ENODEV;

	if (arc_pgu_setup_crtc(drm) < 0)
		return -ENODEV;

	/* find the encoder node and initialize it */
	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
	if (encoder_node) {
		ret = arcpgu_drm_hdmi_init(drm, encoder_node);
		of_node_put(encoder_node);
		if (ret < 0)
			return ret;
	} else {
		ret = arcpgu_drm_sim_init(drm, NULL);
		if (ret < 0)
			return ret;
	}

	drm_mode_config_reset(drm);
	drm_kms_helper_poll_init(drm);

	arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
					   drm->mode_config.num_connector);
	if (IS_ERR(arcpgu->fbdev)) {
		ret = PTR_ERR(arcpgu->fbdev);
		arcpgu->fbdev = NULL;
		return -ENODEV;
	}

	platform_set_drvdata(pdev, arcpgu);
	return 0;
}

static int arcpgu_unload(struct drm_device *drm)
{
	struct arcpgu_drm_private *arcpgu = drm->dev_private;

	if (arcpgu->fbdev) {
		drm_fbdev_cma_fini(arcpgu->fbdev);
		arcpgu->fbdev = NULL;
	}
	drm_kms_helper_poll_fini(drm);
	drm_vblank_cleanup(drm);
	drm_mode_config_cleanup(drm);

	return 0;
}

static struct drm_driver arcpgu_drm_driver = {
	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
			   DRIVER_ATOMIC,
	.lastclose = arcpgu_lastclose,
	.name = "drm-arcpgu",
	.desc = "ARC PGU Controller",
	.date = "20160219",
	.major = 1,
	.minor = 0,
	.patchlevel = 0,
	.fops = &arcpgu_drm_ops,
	.dumb_create = drm_gem_cma_dumb_create,
	.dumb_map_offset = drm_gem_cma_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_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops = &drm_gem_cma_vm_ops,
	.gem_prime_export = drm_gem_prime_export,
	.gem_prime_import = drm_gem_prime_import,
	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	.gem_prime_mmap = drm_gem_cma_prime_mmap,
};

static int arcpgu_probe(struct platform_device *pdev)
{
	struct drm_device *drm;
	int ret;

	drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	ret = arcpgu_load(drm);
	if (ret)
		goto err_unref;

	ret = drm_dev_register(drm, 0);
	if (ret)
		goto err_unload;

	return 0;

err_unload:
	arcpgu_unload(drm);

err_unref:
	drm_dev_unref(drm);

	return ret;
}

static int arcpgu_remove(struct platform_device *pdev)
{
	struct drm_device *drm = platform_get_drvdata(pdev);

	drm_dev_unregister(drm);
	arcpgu_unload(drm);
	drm_dev_unref(drm);

	return 0;
}

static const struct of_device_id arcpgu_of_table[] = {
	{.compatible = "snps,arcpgu"},
	{}
};

MODULE_DEVICE_TABLE(of, arcpgu_of_table);

static struct platform_driver arcpgu_platform_driver = {
	.probe = arcpgu_probe,
	.remove = arcpgu_remove,
	.driver = {
		   .name = "arcpgu",
		   .of_match_table = arcpgu_of_table,
		   },
};

module_platform_driver(arcpgu_platform_driver);

MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
MODULE_DESCRIPTION("ARC PGU DRM driver");
MODULE_LICENSE("GPL");