summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/zte/zx_drm_drv.c
blob: c983cdfa1e34c6013dafbea9b20c592ace7e3e64 (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
/*
 * Copyright 2016 Linaro Ltd.
 * Copyright 2016 ZTE Corporation.
 *
 * 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/list.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>

#include "zx_drm_drv.h"
#include "zx_vou.h"

struct zx_drm_private {
	struct drm_fbdev_cma *fbdev;
};

static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
{
	struct zx_drm_private *priv = drm->dev_private;

	drm_fbdev_cma_hotplug_event(priv->fbdev);
}

static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
	.fb_create = drm_fb_cma_create,
	.output_poll_changed = zx_drm_fb_output_poll_changed,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static void zx_drm_lastclose(struct drm_device *drm)
{
	struct zx_drm_private *priv = drm->dev_private;

	drm_fbdev_cma_restore_mode(priv->fbdev);
}

DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);

static struct drm_driver zx_drm_driver = {
	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
			   DRIVER_ATOMIC,
	.lastclose = zx_drm_lastclose,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops = &drm_gem_cma_vm_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_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,
	.fops = &zx_drm_fops,
	.name = "zx-vou",
	.desc = "ZTE VOU Controller DRM",
	.date = "20160811",
	.major = 1,
	.minor = 0,
};

static int zx_drm_bind(struct device *dev)
{
	struct drm_device *drm;
	struct zx_drm_private *priv;
	int ret;

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

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

	drm->dev_private = priv;
	dev_set_drvdata(dev, drm);

	drm_mode_config_init(drm);
	drm->mode_config.min_width = 16;
	drm->mode_config.min_height = 16;
	drm->mode_config.max_width = 4096;
	drm->mode_config.max_height = 4096;
	drm->mode_config.funcs = &zx_drm_mode_config_funcs;

	ret = component_bind_all(dev, drm);
	if (ret) {
		DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
		goto out_unregister;
	}

	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (ret < 0) {
		DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
		goto out_unbind;
	}

	/*
	 * We will manage irq handler on our own.  In this case, irq_enabled
	 * need to be true for using vblank core support.
	 */
	drm->irq_enabled = true;

	drm_mode_config_reset(drm);
	drm_kms_helper_poll_init(drm);

	priv->fbdev = drm_fbdev_cma_init(drm, 32,
					 drm->mode_config.num_connector);
	if (IS_ERR(priv->fbdev)) {
		ret = PTR_ERR(priv->fbdev);
		DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
		priv->fbdev = NULL;
		goto out_poll_fini;
	}

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

	return 0;

out_fbdev_fini:
	if (priv->fbdev) {
		drm_fbdev_cma_fini(priv->fbdev);
		priv->fbdev = NULL;
	}
out_poll_fini:
	drm_kms_helper_poll_fini(drm);
	drm_mode_config_cleanup(drm);
out_unbind:
	component_unbind_all(dev, drm);
out_unregister:
	dev_set_drvdata(dev, NULL);
	drm->dev_private = NULL;
	drm_dev_unref(drm);
	return ret;
}

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

	drm_dev_unregister(drm);
	if (priv->fbdev) {
		drm_fbdev_cma_fini(priv->fbdev);
		priv->fbdev = NULL;
	}
	drm_kms_helper_poll_fini(drm);
	drm_mode_config_cleanup(drm);
	component_unbind_all(dev, drm);
	dev_set_drvdata(dev, NULL);
	drm->dev_private = NULL;
	drm_dev_unref(drm);
}

static const struct component_master_ops zx_drm_master_ops = {
	.bind = zx_drm_bind,
	.unbind = zx_drm_unbind,
};

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

static int zx_drm_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *parent = dev->of_node;
	struct device_node *child;
	struct component_match *match = NULL;
	int ret;

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

	for_each_available_child_of_node(parent, child) {
		component_match_add(dev, &match, compare_of, child);
		of_node_put(child);
	}

	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
}

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

static const struct of_device_id zx_drm_of_match[] = {
	{ .compatible = "zte,zx296718-vou", },
	{ /* end */ },
};
MODULE_DEVICE_TABLE(of, zx_drm_of_match);

static struct platform_driver zx_drm_platform_driver = {
	.probe = zx_drm_probe,
	.remove = zx_drm_remove,
	.driver	= {
		.name = "zx-drm",
		.of_match_table	= zx_drm_of_match,
	},
};

static struct platform_driver *drivers[] = {
	&zx_crtc_driver,
	&zx_hdmi_driver,
	&zx_tvenc_driver,
	&zx_vga_driver,
	&zx_drm_platform_driver,
};

static int zx_drm_init(void)
{
	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
module_init(zx_drm_init);

static void zx_drm_exit(void)
{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(zx_drm_exit);

MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud