1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2012 Russell King
4 */
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_managed.h>
16 #include <drm/drm_prime.h>
17 #include <drm/drm_probe_helper.h>
18 #include <drm/drm_fb_helper.h>
19 #include <drm/drm_of.h>
20 #include <drm/drm_vblank.h>
21
22 #include "armada_crtc.h"
23 #include "armada_drm.h"
24 #include "armada_gem.h"
25 #include "armada_fb.h"
26 #include "armada_hw.h"
27 #include <drm/armada_drm.h>
28 #include "armada_ioctlP.h"
29
30 static struct drm_ioctl_desc armada_ioctls[] = {
31 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
32 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
33 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
34 };
35
36 DEFINE_DRM_GEM_FOPS(armada_drm_fops);
37
38 static struct drm_driver armada_drm_driver = {
39 .lastclose = drm_fb_helper_lastclose,
40 .gem_free_object_unlocked = armada_gem_free_object,
41 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
42 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
43 .gem_prime_export = armada_gem_prime_export,
44 .gem_prime_import = armada_gem_prime_import,
45 .dumb_create = armada_gem_dumb_create,
46 .gem_vm_ops = &armada_gem_vm_ops,
47 .major = 1,
48 .minor = 0,
49 .name = "armada-drm",
50 .desc = "Armada SoC DRM",
51 .date = "20120730",
52 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
53 .ioctls = armada_ioctls,
54 .fops = &armada_drm_fops,
55 };
56
57 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
58 .fb_create = armada_fb_create,
59 .output_poll_changed = drm_fb_helper_output_poll_changed,
60 .atomic_check = drm_atomic_helper_check,
61 .atomic_commit = drm_atomic_helper_commit,
62 };
63
armada_drm_bind(struct device * dev)64 static int armada_drm_bind(struct device *dev)
65 {
66 struct armada_private *priv;
67 struct resource *mem = NULL;
68 int ret, n;
69
70 for (n = 0; ; n++) {
71 struct resource *r = platform_get_resource(to_platform_device(dev),
72 IORESOURCE_MEM, n);
73 if (!r)
74 break;
75
76 /* Resources above 64K are graphics memory */
77 if (resource_size(r) > SZ_64K)
78 mem = r;
79 else
80 return -EINVAL;
81 }
82
83 if (!mem)
84 return -ENXIO;
85
86 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
87 "armada-drm"))
88 return -EBUSY;
89
90 priv = devm_drm_dev_alloc(dev, &armada_drm_driver,
91 struct armada_private, drm);
92 if (IS_ERR(priv)) {
93 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
94 __func__, PTR_ERR(priv));
95 return PTR_ERR(priv);
96 }
97
98 /* Remove early framebuffers */
99 ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
100 "armada-drm-fb",
101 false);
102 if (ret) {
103 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
104 __func__, ret);
105 kfree(priv);
106 return ret;
107 }
108
109 dev_set_drvdata(dev, &priv->drm);
110
111 /* Mode setting support */
112 drm_mode_config_init(&priv->drm);
113 priv->drm.mode_config.min_width = 320;
114 priv->drm.mode_config.min_height = 200;
115
116 /*
117 * With vscale enabled, the maximum width is 1920 due to the
118 * 1920 by 3 lines RAM
119 */
120 priv->drm.mode_config.max_width = 1920;
121 priv->drm.mode_config.max_height = 2048;
122
123 priv->drm.mode_config.preferred_depth = 24;
124 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
125 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
126 mutex_init(&priv->linear_lock);
127
128 ret = component_bind_all(dev, &priv->drm);
129 if (ret)
130 goto err_kms;
131
132 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
133 if (ret)
134 goto err_comp;
135
136 priv->drm.irq_enabled = true;
137
138 drm_mode_config_reset(&priv->drm);
139
140 ret = armada_fbdev_init(&priv->drm);
141 if (ret)
142 goto err_comp;
143
144 drm_kms_helper_poll_init(&priv->drm);
145
146 ret = drm_dev_register(&priv->drm, 0);
147 if (ret)
148 goto err_poll;
149
150 #ifdef CONFIG_DEBUG_FS
151 armada_drm_debugfs_init(priv->drm.primary);
152 #endif
153
154 return 0;
155
156 err_poll:
157 drm_kms_helper_poll_fini(&priv->drm);
158 armada_fbdev_fini(&priv->drm);
159 err_comp:
160 component_unbind_all(dev, &priv->drm);
161 err_kms:
162 drm_mode_config_cleanup(&priv->drm);
163 drm_mm_takedown(&priv->linear);
164 return ret;
165 }
166
armada_drm_unbind(struct device * dev)167 static void armada_drm_unbind(struct device *dev)
168 {
169 struct drm_device *drm = dev_get_drvdata(dev);
170 struct armada_private *priv = drm_to_armada_dev(drm);
171
172 drm_kms_helper_poll_fini(&priv->drm);
173 armada_fbdev_fini(&priv->drm);
174
175 drm_dev_unregister(&priv->drm);
176
177 drm_atomic_helper_shutdown(&priv->drm);
178
179 component_unbind_all(dev, &priv->drm);
180
181 drm_mode_config_cleanup(&priv->drm);
182 drm_mm_takedown(&priv->linear);
183 }
184
compare_of(struct device * dev,void * data)185 static int compare_of(struct device *dev, void *data)
186 {
187 return dev->of_node == data;
188 }
189
compare_dev_name(struct device * dev,void * data)190 static int compare_dev_name(struct device *dev, void *data)
191 {
192 const char *name = data;
193 return !strcmp(dev_name(dev), name);
194 }
195
armada_add_endpoints(struct device * dev,struct component_match ** match,struct device_node * dev_node)196 static void armada_add_endpoints(struct device *dev,
197 struct component_match **match, struct device_node *dev_node)
198 {
199 struct device_node *ep, *remote;
200
201 for_each_endpoint_of_node(dev_node, ep) {
202 remote = of_graph_get_remote_port_parent(ep);
203 if (remote && of_device_is_available(remote))
204 drm_of_component_match_add(dev, match, compare_of,
205 remote);
206 of_node_put(remote);
207 }
208 }
209
210 static const struct component_master_ops armada_master_ops = {
211 .bind = armada_drm_bind,
212 .unbind = armada_drm_unbind,
213 };
214
armada_drm_probe(struct platform_device * pdev)215 static int armada_drm_probe(struct platform_device *pdev)
216 {
217 struct component_match *match = NULL;
218 struct device *dev = &pdev->dev;
219 int ret;
220
221 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
222 if (ret != -EINVAL)
223 return ret;
224
225 if (dev->platform_data) {
226 char **devices = dev->platform_data;
227 struct device *d;
228 int i;
229
230 for (i = 0; devices[i]; i++)
231 component_match_add(dev, &match, compare_dev_name,
232 devices[i]);
233
234 if (i == 0) {
235 dev_err(dev, "missing 'ports' property\n");
236 return -ENODEV;
237 }
238
239 for (i = 0; devices[i]; i++) {
240 d = bus_find_device_by_name(&platform_bus_type, NULL,
241 devices[i]);
242 if (d && d->of_node)
243 armada_add_endpoints(dev, &match, d->of_node);
244 put_device(d);
245 }
246 }
247
248 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
249 match);
250 }
251
armada_drm_remove(struct platform_device * pdev)252 static int armada_drm_remove(struct platform_device *pdev)
253 {
254 component_master_del(&pdev->dev, &armada_master_ops);
255 return 0;
256 }
257
258 static const struct platform_device_id armada_drm_platform_ids[] = {
259 {
260 .name = "armada-drm",
261 }, {
262 .name = "armada-510-drm",
263 },
264 { },
265 };
266 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
267
268 static struct platform_driver armada_drm_platform_driver = {
269 .probe = armada_drm_probe,
270 .remove = armada_drm_remove,
271 .driver = {
272 .name = "armada-drm",
273 },
274 .id_table = armada_drm_platform_ids,
275 };
276
armada_drm_init(void)277 static int __init armada_drm_init(void)
278 {
279 int ret;
280
281 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
282
283 ret = platform_driver_register(&armada_lcd_platform_driver);
284 if (ret)
285 return ret;
286 ret = platform_driver_register(&armada_drm_platform_driver);
287 if (ret)
288 platform_driver_unregister(&armada_lcd_platform_driver);
289 return ret;
290 }
291 module_init(armada_drm_init);
292
armada_drm_exit(void)293 static void __exit armada_drm_exit(void)
294 {
295 platform_driver_unregister(&armada_drm_platform_driver);
296 platform_driver_unregister(&armada_lcd_platform_driver);
297 }
298 module_exit(armada_drm_exit);
299
300 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
301 MODULE_DESCRIPTION("Armada DRM Driver");
302 MODULE_LICENSE("GPL");
303 MODULE_ALIAS("platform:armada-drm");
304