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
|
/*
* Hisilicon SoCs drm master driver
*
* Copyright (c) 2014-2015 Hisilicon Limited.
* Author:
* Xinliang Liu <xinliang.liu@linaro.org>
* Xinliang Liu <z.liuxinliang@hisilicon.com>
* Xinwei Kong <kong.kongxinwei@hisilicon.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.
*
*/
#include <linux/of_platform.h>
#include <linux/component.h>
#include <drm/drmP.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_atomic_helper.h>
#include "hisi_drm_drv.h"
#define DRIVER_NAME "hisi-drm"
static int hisi_drm_unload(struct drm_device *dev)
{
struct hisi_drm_private *priv = dev->dev_private;
drm_mode_config_cleanup(dev);
devm_kfree(dev->dev, priv);
dev->dev_private = NULL;
return 0;
}
static const struct drm_mode_config_funcs hisi_drm_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static void hisi_drm_mode_config_init(struct drm_device *dev)
{
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
dev->mode_config.max_width = 2048;
dev->mode_config.max_height = 2048;
dev->mode_config.funcs = &hisi_drm_mode_config_funcs;
}
static int hisi_drm_load(struct drm_device *dev, unsigned long flags)
{
struct hisi_drm_private *priv;
int ret;
priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev->dev_private = priv;
dev_set_drvdata(dev->dev, dev);
/* dev->mode_config initialization */
drm_mode_config_init(dev);
hisi_drm_mode_config_init(dev);
/* bind and init sub drivers */
ret = component_bind_all(dev->dev, dev);
if (ret) {
DRM_ERROR("failed to bind all component.\n");
goto err_mode_config_cleanup;
}
/* reset all the states of crtc/plane/encoder/connector */
drm_mode_config_reset(dev);
return 0;
err_mode_config_cleanup:
drm_mode_config_cleanup(dev);
devm_kfree(dev->dev, priv);
dev->dev_private = NULL;
return ret;
}
static const struct file_operations hisi_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct dma_buf *hisi_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *obj,
int flags)
{
/* we want to be able to write in mmapped buffer */
flags |= O_RDWR;
return drm_gem_prime_export(dev, obj, flags);
}
static int hisi_gem_cma_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
/* mali gpu need pitch 8 bytes alignment for 32bpp */
args->pitch = roundup(min_pitch, 8);
return drm_gem_cma_dumb_create_internal(file, dev, args);
}
static struct drm_driver hisi_drm_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
DRIVER_ATOMIC,
.load = hisi_drm_load,
.unload = hisi_drm_unload,
.fops = &hisi_drm_fops,
.set_busid = drm_platform_set_busid,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = hisi_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 = hisi_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,
.name = "hisi",
.desc = "Hisilicon SoCs' DRM Driver",
.date = "20150718",
.major = 1,
.minor = 0,
};
static int compare_of(struct device *dev, void *data)
{
return dev->of_node == data;
}
static int hisi_drm_bind(struct device *dev)
{
dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
return drm_platform_init(&hisi_drm_driver, to_platform_device(dev));
}
static void hisi_drm_unbind(struct device *dev)
{
drm_put_dev(dev_get_drvdata(dev));
}
static const struct component_master_ops hisi_drm_ops = {
.bind = hisi_drm_bind,
.unbind = hisi_drm_unbind,
};
static int hisi_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct device_node *child_np;
struct component_match *match = NULL;
of_platform_populate(node, NULL, NULL, dev);
child_np = of_get_next_available_child(node, NULL);
while (child_np) {
component_match_add(dev, &match, compare_of, child_np);
of_node_put(child_np);
child_np = of_get_next_available_child(node, child_np);
}
return component_master_add_with_match(dev, &hisi_drm_ops, match);
return 0;
}
static int hisi_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &hisi_drm_ops);
of_platform_depopulate(&pdev->dev);
return 0;
}
static const struct of_device_id hisi_drm_dt_ids[] = {
{ .compatible = "hisilicon,hi6220-dss", },
{ /* end node */ },
};
MODULE_DEVICE_TABLE(of, hisi_drm_dt_ids);
static struct platform_driver hisi_drm_platform_driver = {
.probe = hisi_drm_platform_probe,
.remove = hisi_drm_platform_remove,
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
.of_match_table = hisi_drm_dt_ids,
},
};
module_platform_driver(hisi_drm_platform_driver);
MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
MODULE_DESCRIPTION("hisilicon SoCs' DRM master driver");
MODULE_LICENSE("GPL v2");
|
