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8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/module.h>
11#include <linux/of_graph.h>
12#include <drm/drmP.h>
13#include <drm/drm_crtc_helper.h>
14#include <drm/drm_of.h>
15#include "armada_crtc.h"
16#include "armada_drm.h"
17#include "armada_gem.h"
18#include "armada_hw.h"
19#include <drm/armada_drm.h>
20#include "armada_ioctlP.h"
21
22static void armada_drm_unref_work(struct work_struct *work)
23{
24 struct armada_private *priv =
25 container_of(work, struct armada_private, fb_unref_work);
26 struct drm_framebuffer *fb;
27
28 while (kfifo_get(&priv->fb_unref, &fb))
29 drm_framebuffer_unreference(fb);
30}
31
32
33void __armada_drm_queue_unref_work(struct drm_device *dev,
34 struct drm_framebuffer *fb)
35{
36 struct armada_private *priv = dev->dev_private;
37
38 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
39 schedule_work(&priv->fb_unref_work);
40}
41
42void armada_drm_queue_unref_work(struct drm_device *dev,
43 struct drm_framebuffer *fb)
44{
45 unsigned long flags;
46
47 spin_lock_irqsave(&dev->event_lock, flags);
48 __armada_drm_queue_unref_work(dev, fb);
49 spin_unlock_irqrestore(&dev->event_lock, flags);
50}
51
52static struct drm_ioctl_desc armada_ioctls[] = {
53 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
54 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
55 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
56};
57
58static void armada_drm_lastclose(struct drm_device *dev)
59{
60 armada_fbdev_lastclose(dev);
61}
62
63DEFINE_DRM_GEM_FOPS(armada_drm_fops);
64
65static struct drm_driver armada_drm_driver = {
66 .lastclose = armada_drm_lastclose,
67 .gem_free_object_unlocked = armada_gem_free_object,
68 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
69 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
70 .gem_prime_export = armada_gem_prime_export,
71 .gem_prime_import = armada_gem_prime_import,
72 .dumb_create = armada_gem_dumb_create,
73 .dumb_map_offset = armada_gem_dumb_map_offset,
74 .dumb_destroy = armada_gem_dumb_destroy,
75 .gem_vm_ops = &armada_gem_vm_ops,
76 .major = 1,
77 .minor = 0,
78 .name = "armada-drm",
79 .desc = "Armada SoC DRM",
80 .date = "20120730",
81 .driver_features = DRIVER_GEM | DRIVER_MODESET |
82 DRIVER_PRIME,
83 .ioctls = armada_ioctls,
84 .fops = &armada_drm_fops,
85};
86
87static int armada_drm_bind(struct device *dev)
88{
89 struct armada_private *priv;
90 struct resource *mem = NULL;
91 int ret, n;
92
93 for (n = 0; ; n++) {
94 struct resource *r = platform_get_resource(to_platform_device(dev),
95 IORESOURCE_MEM, n);
96 if (!r)
97 break;
98
99
100 if (resource_size(r) > SZ_64K)
101 mem = r;
102 else
103 return -EINVAL;
104 }
105
106 if (!mem)
107 return -ENXIO;
108
109 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
110 "armada-drm"))
111 return -EBUSY;
112
113 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
114 if (!priv)
115 return -ENOMEM;
116
117
118
119
120
121 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
122
123 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
124 if (ret) {
125 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
126 __func__, ret);
127 kfree(priv);
128 return ret;
129 }
130
131 priv->drm.dev_private = priv;
132
133 dev_set_drvdata(dev, &priv->drm);
134
135 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
136 INIT_KFIFO(priv->fb_unref);
137
138
139 drm_mode_config_init(&priv->drm);
140 priv->drm.mode_config.min_width = 320;
141 priv->drm.mode_config.min_height = 200;
142
143
144
145
146
147 priv->drm.mode_config.max_width = 1920;
148 priv->drm.mode_config.max_height = 2048;
149
150 priv->drm.mode_config.preferred_depth = 24;
151 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
152 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
153 mutex_init(&priv->linear_lock);
154
155 ret = component_bind_all(dev, &priv->drm);
156 if (ret)
157 goto err_kms;
158
159 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
160 if (ret)
161 goto err_comp;
162
163 priv->drm.irq_enabled = true;
164
165 ret = armada_fbdev_init(&priv->drm);
166 if (ret)
167 goto err_comp;
168
169 drm_kms_helper_poll_init(&priv->drm);
170
171 ret = drm_dev_register(&priv->drm, 0);
172 if (ret)
173 goto err_poll;
174
175#ifdef CONFIG_DEBUG_FS
176 armada_drm_debugfs_init(priv->drm.primary);
177#endif
178
179 return 0;
180
181 err_poll:
182 drm_kms_helper_poll_fini(&priv->drm);
183 armada_fbdev_fini(&priv->drm);
184 err_comp:
185 component_unbind_all(dev, &priv->drm);
186 err_kms:
187 drm_mode_config_cleanup(&priv->drm);
188 drm_mm_takedown(&priv->linear);
189 flush_work(&priv->fb_unref_work);
190 drm_dev_unref(&priv->drm);
191 return ret;
192}
193
194static void armada_drm_unbind(struct device *dev)
195{
196 struct drm_device *drm = dev_get_drvdata(dev);
197 struct armada_private *priv = drm->dev_private;
198
199 drm_kms_helper_poll_fini(&priv->drm);
200 armada_fbdev_fini(&priv->drm);
201
202 drm_dev_unregister(&priv->drm);
203
204 component_unbind_all(dev, &priv->drm);
205
206 drm_mode_config_cleanup(&priv->drm);
207 drm_mm_takedown(&priv->linear);
208 flush_work(&priv->fb_unref_work);
209
210 drm_dev_unref(&priv->drm);
211}
212
213static int compare_of(struct device *dev, void *data)
214{
215 return dev->of_node == data;
216}
217
218static int compare_dev_name(struct device *dev, void *data)
219{
220 const char *name = data;
221 return !strcmp(dev_name(dev), name);
222}
223
224static void armada_add_endpoints(struct device *dev,
225 struct component_match **match, struct device_node *port)
226{
227 struct device_node *ep, *remote;
228
229 for_each_child_of_node(port, ep) {
230 remote = of_graph_get_remote_port_parent(ep);
231 if (!remote || !of_device_is_available(remote)) {
232 of_node_put(remote);
233 continue;
234 } else if (!of_device_is_available(remote->parent)) {
235 dev_warn(dev, "parent device of %pOF is not available\n",
236 remote);
237 of_node_put(remote);
238 continue;
239 }
240
241 drm_of_component_match_add(dev, match, compare_of, remote);
242 of_node_put(remote);
243 }
244}
245
246static const struct component_master_ops armada_master_ops = {
247 .bind = armada_drm_bind,
248 .unbind = armada_drm_unbind,
249};
250
251static int armada_drm_probe(struct platform_device *pdev)
252{
253 struct component_match *match = NULL;
254 struct device *dev = &pdev->dev;
255 int ret;
256
257 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
258 if (ret != -EINVAL)
259 return ret;
260
261 if (dev->platform_data) {
262 char **devices = dev->platform_data;
263 struct device_node *port;
264 struct device *d;
265 int i;
266
267 for (i = 0; devices[i]; i++)
268 component_match_add(dev, &match, compare_dev_name,
269 devices[i]);
270
271 if (i == 0) {
272 dev_err(dev, "missing 'ports' property\n");
273 return -ENODEV;
274 }
275
276 for (i = 0; devices[i]; i++) {
277 d = bus_find_device_by_name(&platform_bus_type, NULL,
278 devices[i]);
279 if (d && d->of_node) {
280 for_each_child_of_node(d->of_node, port)
281 armada_add_endpoints(dev, &match, port);
282 }
283 put_device(d);
284 }
285 }
286
287 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
288 match);
289}
290
291static int armada_drm_remove(struct platform_device *pdev)
292{
293 component_master_del(&pdev->dev, &armada_master_ops);
294 return 0;
295}
296
297static const struct platform_device_id armada_drm_platform_ids[] = {
298 {
299 .name = "armada-drm",
300 }, {
301 .name = "armada-510-drm",
302 },
303 { },
304};
305MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
306
307static struct platform_driver armada_drm_platform_driver = {
308 .probe = armada_drm_probe,
309 .remove = armada_drm_remove,
310 .driver = {
311 .name = "armada-drm",
312 },
313 .id_table = armada_drm_platform_ids,
314};
315
316static int __init armada_drm_init(void)
317{
318 int ret;
319
320 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
321
322 ret = platform_driver_register(&armada_lcd_platform_driver);
323 if (ret)
324 return ret;
325 ret = platform_driver_register(&armada_drm_platform_driver);
326 if (ret)
327 platform_driver_unregister(&armada_lcd_platform_driver);
328 return ret;
329}
330module_init(armada_drm_init);
331
332static void __exit armada_drm_exit(void)
333{
334 platform_driver_unregister(&armada_drm_platform_driver);
335 platform_driver_unregister(&armada_lcd_platform_driver);
336}
337module_exit(armada_drm_exit);
338
339MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
340MODULE_DESCRIPTION("Armada DRM Driver");
341MODULE_LICENSE("GPL");
342MODULE_ALIAS("platform:armada-drm");
343
