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5
6#include <linux/clk.h>
7#include <linux/component.h>
8#include <linux/module.h>
9#include <linux/of_graph.h>
10#include <linux/platform_device.h>
11
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_drv.h>
14#include <drm/drm_ioctl.h>
15#include <drm/drm_prime.h>
16#include <drm/drm_probe_helper.h>
17#include <drm/drm_fb_helper.h>
18#include <drm/drm_of.h>
19#include <drm/drm_vblank.h>
20
21#include "armada_crtc.h"
22#include "armada_drm.h"
23#include "armada_gem.h"
24#include "armada_fb.h"
25#include "armada_hw.h"
26#include <drm/armada_drm.h>
27#include "armada_ioctlP.h"
28
29static struct drm_ioctl_desc armada_ioctls[] = {
30 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
31 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
32 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
33};
34
35DEFINE_DRM_GEM_FOPS(armada_drm_fops);
36
37static struct drm_driver armada_drm_driver = {
38 .lastclose = drm_fb_helper_lastclose,
39 .gem_free_object_unlocked = armada_gem_free_object,
40 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
41 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
42 .gem_prime_export = armada_gem_prime_export,
43 .gem_prime_import = armada_gem_prime_import,
44 .dumb_create = armada_gem_dumb_create,
45 .gem_vm_ops = &armada_gem_vm_ops,
46 .major = 1,
47 .minor = 0,
48 .name = "armada-drm",
49 .desc = "Armada SoC DRM",
50 .date = "20120730",
51 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
52 .ioctls = armada_ioctls,
53 .fops = &armada_drm_fops,
54};
55
56static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
57 .fb_create = armada_fb_create,
58 .output_poll_changed = drm_fb_helper_output_poll_changed,
59 .atomic_check = drm_atomic_helper_check,
60 .atomic_commit = drm_atomic_helper_commit,
61};
62
63static int armada_drm_bind(struct device *dev)
64{
65 struct armada_private *priv;
66 struct resource *mem = NULL;
67 int ret, n;
68
69 for (n = 0; ; n++) {
70 struct resource *r = platform_get_resource(to_platform_device(dev),
71 IORESOURCE_MEM, n);
72 if (!r)
73 break;
74
75
76 if (resource_size(r) > SZ_64K)
77 mem = r;
78 else
79 return -EINVAL;
80 }
81
82 if (!mem)
83 return -ENXIO;
84
85 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
86 "armada-drm"))
87 return -EBUSY;
88
89 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
90 if (!priv)
91 return -ENOMEM;
92
93
94
95
96
97 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
98
99 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
100 if (ret) {
101 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
102 __func__, ret);
103 kfree(priv);
104 return ret;
105 }
106
107
108 ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
109 "armada-drm-fb",
110 false);
111 if (ret) {
112 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
113 __func__, ret);
114 kfree(priv);
115 return ret;
116 }
117
118 priv->drm.dev_private = priv;
119
120 dev_set_drvdata(dev, &priv->drm);
121
122
123 drm_mode_config_init(&priv->drm);
124 priv->drm.mode_config.min_width = 320;
125 priv->drm.mode_config.min_height = 200;
126
127
128
129
130
131 priv->drm.mode_config.max_width = 1920;
132 priv->drm.mode_config.max_height = 2048;
133
134 priv->drm.mode_config.preferred_depth = 24;
135 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
136 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
137 mutex_init(&priv->linear_lock);
138
139 ret = component_bind_all(dev, &priv->drm);
140 if (ret)
141 goto err_kms;
142
143 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
144 if (ret)
145 goto err_comp;
146
147 priv->drm.irq_enabled = true;
148
149 drm_mode_config_reset(&priv->drm);
150
151 ret = armada_fbdev_init(&priv->drm);
152 if (ret)
153 goto err_comp;
154
155 drm_kms_helper_poll_init(&priv->drm);
156
157 ret = drm_dev_register(&priv->drm, 0);
158 if (ret)
159 goto err_poll;
160
161#ifdef CONFIG_DEBUG_FS
162 armada_drm_debugfs_init(priv->drm.primary);
163#endif
164
165 return 0;
166
167 err_poll:
168 drm_kms_helper_poll_fini(&priv->drm);
169 armada_fbdev_fini(&priv->drm);
170 err_comp:
171 component_unbind_all(dev, &priv->drm);
172 err_kms:
173 drm_mode_config_cleanup(&priv->drm);
174 drm_mm_takedown(&priv->linear);
175 drm_dev_put(&priv->drm);
176 return ret;
177}
178
179static void armada_drm_unbind(struct device *dev)
180{
181 struct drm_device *drm = dev_get_drvdata(dev);
182 struct armada_private *priv = drm->dev_private;
183
184 drm_kms_helper_poll_fini(&priv->drm);
185 armada_fbdev_fini(&priv->drm);
186
187 drm_dev_unregister(&priv->drm);
188
189 drm_atomic_helper_shutdown(&priv->drm);
190
191 component_unbind_all(dev, &priv->drm);
192
193 drm_mode_config_cleanup(&priv->drm);
194 drm_mm_takedown(&priv->linear);
195
196 drm_dev_put(&priv->drm);
197}
198
199static int compare_of(struct device *dev, void *data)
200{
201 return dev->of_node == data;
202}
203
204static int compare_dev_name(struct device *dev, void *data)
205{
206 const char *name = data;
207 return !strcmp(dev_name(dev), name);
208}
209
210static void armada_add_endpoints(struct device *dev,
211 struct component_match **match, struct device_node *dev_node)
212{
213 struct device_node *ep, *remote;
214
215 for_each_endpoint_of_node(dev_node, ep) {
216 remote = of_graph_get_remote_port_parent(ep);
217 if (remote && of_device_is_available(remote))
218 drm_of_component_match_add(dev, match, compare_of,
219 remote);
220 of_node_put(remote);
221 }
222}
223
224static const struct component_master_ops armada_master_ops = {
225 .bind = armada_drm_bind,
226 .unbind = armada_drm_unbind,
227};
228
229static int armada_drm_probe(struct platform_device *pdev)
230{
231 struct component_match *match = NULL;
232 struct device *dev = &pdev->dev;
233 int ret;
234
235 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
236 if (ret != -EINVAL)
237 return ret;
238
239 if (dev->platform_data) {
240 char **devices = dev->platform_data;
241 struct device *d;
242 int i;
243
244 for (i = 0; devices[i]; i++)
245 component_match_add(dev, &match, compare_dev_name,
246 devices[i]);
247
248 if (i == 0) {
249 dev_err(dev, "missing 'ports' property\n");
250 return -ENODEV;
251 }
252
253 for (i = 0; devices[i]; i++) {
254 d = bus_find_device_by_name(&platform_bus_type, NULL,
255 devices[i]);
256 if (d && d->of_node)
257 armada_add_endpoints(dev, &match, d->of_node);
258 put_device(d);
259 }
260 }
261
262 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
263 match);
264}
265
266static int armada_drm_remove(struct platform_device *pdev)
267{
268 component_master_del(&pdev->dev, &armada_master_ops);
269 return 0;
270}
271
272static const struct platform_device_id armada_drm_platform_ids[] = {
273 {
274 .name = "armada-drm",
275 }, {
276 .name = "armada-510-drm",
277 },
278 { },
279};
280MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
281
282static struct platform_driver armada_drm_platform_driver = {
283 .probe = armada_drm_probe,
284 .remove = armada_drm_remove,
285 .driver = {
286 .name = "armada-drm",
287 },
288 .id_table = armada_drm_platform_ids,
289};
290
291static int __init armada_drm_init(void)
292{
293 int ret;
294
295 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
296
297 ret = platform_driver_register(&armada_lcd_platform_driver);
298 if (ret)
299 return ret;
300 ret = platform_driver_register(&armada_drm_platform_driver);
301 if (ret)
302 platform_driver_unregister(&armada_lcd_platform_driver);
303 return ret;
304}
305module_init(armada_drm_init);
306
307static void __exit armada_drm_exit(void)
308{
309 platform_driver_unregister(&armada_drm_platform_driver);
310 platform_driver_unregister(&armada_lcd_platform_driver);
311}
312module_exit(armada_drm_exit);
313
314MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
315MODULE_DESCRIPTION("Armada DRM Driver");
316MODULE_LICENSE("GPL");
317MODULE_ALIAS("platform:armada-drm");
318
