1
2
3
4
5#include <linux/clk.h>
6#include <linux/component.h>
7#include <linux/module.h>
8#include <linux/of_graph.h>
9#include <drm/drm_atomic_helper.h>
10#include <drm/drm_probe_helper.h>
11#include <drm/drm_fb_helper.h>
12#include <drm/drm_of.h>
13#include "armada_crtc.h"
14#include "armada_drm.h"
15#include "armada_gem.h"
16#include "armada_fb.h"
17#include "armada_hw.h"
18#include <drm/armada_drm.h>
19#include "armada_ioctlP.h"
20
21static struct drm_ioctl_desc armada_ioctls[] = {
22 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
23 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
24 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
25};
26
27DEFINE_DRM_GEM_FOPS(armada_drm_fops);
28
29static struct drm_driver armada_drm_driver = {
30 .lastclose = drm_fb_helper_lastclose,
31 .gem_free_object_unlocked = armada_gem_free_object,
32 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
33 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
34 .gem_prime_export = armada_gem_prime_export,
35 .gem_prime_import = armada_gem_prime_import,
36 .dumb_create = armada_gem_dumb_create,
37 .gem_vm_ops = &armada_gem_vm_ops,
38 .major = 1,
39 .minor = 0,
40 .name = "armada-drm",
41 .desc = "Armada SoC DRM",
42 .date = "20120730",
43 .driver_features = DRIVER_GEM | DRIVER_MODESET |
44 DRIVER_PRIME | DRIVER_ATOMIC,
45 .ioctls = armada_ioctls,
46 .fops = &armada_drm_fops,
47};
48
49static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
50 .fb_create = armada_fb_create,
51 .output_poll_changed = drm_fb_helper_output_poll_changed,
52 .atomic_check = drm_atomic_helper_check,
53 .atomic_commit = drm_atomic_helper_commit,
54};
55
56static int armada_drm_bind(struct device *dev)
57{
58 struct armada_private *priv;
59 struct resource *mem = NULL;
60 int ret, n;
61
62 for (n = 0; ; n++) {
63 struct resource *r = platform_get_resource(to_platform_device(dev),
64 IORESOURCE_MEM, n);
65 if (!r)
66 break;
67
68
69 if (resource_size(r) > SZ_64K)
70 mem = r;
71 else
72 return -EINVAL;
73 }
74
75 if (!mem)
76 return -ENXIO;
77
78 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
79 "armada-drm"))
80 return -EBUSY;
81
82 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
83 if (!priv)
84 return -ENOMEM;
85
86
87
88
89
90 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
91
92 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
93 if (ret) {
94 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
95 __func__, ret);
96 kfree(priv);
97 return ret;
98 }
99
100
101 ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
102 "armada-drm-fb",
103 false);
104 if (ret) {
105 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
106 __func__, ret);
107 kfree(priv);
108 return ret;
109 }
110
111 priv->drm.dev_private = priv;
112
113 dev_set_drvdata(dev, &priv->drm);
114
115
116 drm_mode_config_init(&priv->drm);
117 priv->drm.mode_config.min_width = 320;
118 priv->drm.mode_config.min_height = 200;
119
120
121
122
123
124 priv->drm.mode_config.max_width = 1920;
125 priv->drm.mode_config.max_height = 2048;
126
127 priv->drm.mode_config.preferred_depth = 24;
128 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
129 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
130 mutex_init(&priv->linear_lock);
131
132 ret = component_bind_all(dev, &priv->drm);
133 if (ret)
134 goto err_kms;
135
136 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
137 if (ret)
138 goto err_comp;
139
140 priv->drm.irq_enabled = true;
141
142 drm_mode_config_reset(&priv->drm);
143
144 ret = armada_fbdev_init(&priv->drm);
145 if (ret)
146 goto err_comp;
147
148 drm_kms_helper_poll_init(&priv->drm);
149
150 ret = drm_dev_register(&priv->drm, 0);
151 if (ret)
152 goto err_poll;
153
154#ifdef CONFIG_DEBUG_FS
155 armada_drm_debugfs_init(priv->drm.primary);
156#endif
157
158 return 0;
159
160 err_poll:
161 drm_kms_helper_poll_fini(&priv->drm);
162 armada_fbdev_fini(&priv->drm);
163 err_comp:
164 component_unbind_all(dev, &priv->drm);
165 err_kms:
166 drm_mode_config_cleanup(&priv->drm);
167 drm_mm_takedown(&priv->linear);
168 drm_dev_put(&priv->drm);
169 return ret;
170}
171
172static void armada_drm_unbind(struct device *dev)
173{
174 struct drm_device *drm = dev_get_drvdata(dev);
175 struct armada_private *priv = drm->dev_private;
176
177 drm_kms_helper_poll_fini(&priv->drm);
178 armada_fbdev_fini(&priv->drm);
179
180 drm_dev_unregister(&priv->drm);
181
182 drm_atomic_helper_shutdown(&priv->drm);
183
184 component_unbind_all(dev, &priv->drm);
185
186 drm_mode_config_cleanup(&priv->drm);
187 drm_mm_takedown(&priv->linear);
188
189 drm_dev_put(&priv->drm);
190}
191
192static int compare_of(struct device *dev, void *data)
193{
194 return dev->of_node == data;
195}
196
197static int compare_dev_name(struct device *dev, void *data)
198{
199 const char *name = data;
200 return !strcmp(dev_name(dev), name);
201}
202
203static void armada_add_endpoints(struct device *dev,
204 struct component_match **match, struct device_node *dev_node)
205{
206 struct device_node *ep, *remote;
207
208 for_each_endpoint_of_node(dev_node, ep) {
209 remote = of_graph_get_remote_port_parent(ep);
210 if (remote && of_device_is_available(remote))
211 drm_of_component_match_add(dev, match, compare_of,
212 remote);
213 of_node_put(remote);
214 }
215}
216
217static const struct component_master_ops armada_master_ops = {
218 .bind = armada_drm_bind,
219 .unbind = armada_drm_unbind,
220};
221
222static int armada_drm_probe(struct platform_device *pdev)
223{
224 struct component_match *match = NULL;
225 struct device *dev = &pdev->dev;
226 int ret;
227
228 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
229 if (ret != -EINVAL)
230 return ret;
231
232 if (dev->platform_data) {
233 char **devices = dev->platform_data;
234 struct device *d;
235 int i;
236
237 for (i = 0; devices[i]; i++)
238 component_match_add(dev, &match, compare_dev_name,
239 devices[i]);
240
241 if (i == 0) {
242 dev_err(dev, "missing 'ports' property\n");
243 return -ENODEV;
244 }
245
246 for (i = 0; devices[i]; i++) {
247 d = bus_find_device_by_name(&platform_bus_type, NULL,
248 devices[i]);
249 if (d && d->of_node)
250 armada_add_endpoints(dev, &match, d->of_node);
251 put_device(d);
252 }
253 }
254
255 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
256 match);
257}
258
259static int armada_drm_remove(struct platform_device *pdev)
260{
261 component_master_del(&pdev->dev, &armada_master_ops);
262 return 0;
263}
264
265static const struct platform_device_id armada_drm_platform_ids[] = {
266 {
267 .name = "armada-drm",
268 }, {
269 .name = "armada-510-drm",
270 },
271 { },
272};
273MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
274
275static struct platform_driver armada_drm_platform_driver = {
276 .probe = armada_drm_probe,
277 .remove = armada_drm_remove,
278 .driver = {
279 .name = "armada-drm",
280 },
281 .id_table = armada_drm_platform_ids,
282};
283
284static int __init armada_drm_init(void)
285{
286 int ret;
287
288 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
289
290 ret = platform_driver_register(&armada_lcd_platform_driver);
291 if (ret)
292 return ret;
293 ret = platform_driver_register(&armada_drm_platform_driver);
294 if (ret)
295 platform_driver_unregister(&armada_lcd_platform_driver);
296 return ret;
297}
298module_init(armada_drm_init);
299
300static void __exit armada_drm_exit(void)
301{
302 platform_driver_unregister(&armada_drm_platform_driver);
303 platform_driver_unregister(&armada_lcd_platform_driver);
304}
305module_exit(armada_drm_exit);
306
307MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
308MODULE_DESCRIPTION("Armada DRM Driver");
309MODULE_LICENSE("GPL");
310MODULE_ALIAS("platform:armada-drm");
311
