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 return ret;
106 }
107
108 dev_set_drvdata(dev, &priv->drm);
109
110 /* Mode setting support */
111 drm_mode_config_init(&priv->drm);
112 priv->drm.mode_config.min_width = 320;
113 priv->drm.mode_config.min_height = 200;
114
115 /*
116 * With vscale enabled, the maximum width is 1920 due to the
117 * 1920 by 3 lines RAM
118 */
119 priv->drm.mode_config.max_width = 1920;
120 priv->drm.mode_config.max_height = 2048;
121
122 priv->drm.mode_config.preferred_depth = 24;
123 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
124 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
125 mutex_init(&priv->linear_lock);
126
127 ret = component_bind_all(dev, &priv->drm);
128 if (ret)
129 goto err_kms;
130
131 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
132 if (ret)
133 goto err_comp;
134
135 priv->drm.irq_enabled = true;
136
137 drm_mode_config_reset(&priv->drm);
138
139 ret = armada_fbdev_init(&priv->drm);
140 if (ret)
141 goto err_comp;
142
143 drm_kms_helper_poll_init(&priv->drm);
144
145 ret = drm_dev_register(&priv->drm, 0);
146 if (ret)
147 goto err_poll;
148
149 #ifdef CONFIG_DEBUG_FS
150 armada_drm_debugfs_init(priv->drm.primary);
151 #endif
152
153 return 0;
154
155 err_poll:
156 drm_kms_helper_poll_fini(&priv->drm);
157 armada_fbdev_fini(&priv->drm);
158 err_comp:
159 component_unbind_all(dev, &priv->drm);
160 err_kms:
161 drm_mode_config_cleanup(&priv->drm);
162 drm_mm_takedown(&priv->linear);
163 return ret;
164 }
165
armada_drm_unbind(struct device * dev)166 static void armada_drm_unbind(struct device *dev)
167 {
168 struct drm_device *drm = dev_get_drvdata(dev);
169 struct armada_private *priv = drm_to_armada_dev(drm);
170
171 drm_kms_helper_poll_fini(&priv->drm);
172 armada_fbdev_fini(&priv->drm);
173
174 drm_dev_unregister(&priv->drm);
175
176 drm_atomic_helper_shutdown(&priv->drm);
177
178 component_unbind_all(dev, &priv->drm);
179
180 drm_mode_config_cleanup(&priv->drm);
181 drm_mm_takedown(&priv->linear);
182 }
183
compare_of(struct device * dev,void * data)184 static int compare_of(struct device *dev, void *data)
185 {
186 return dev->of_node == data;
187 }
188
compare_dev_name(struct device * dev,void * data)189 static int compare_dev_name(struct device *dev, void *data)
190 {
191 const char *name = data;
192 return !strcmp(dev_name(dev), name);
193 }
194
armada_add_endpoints(struct device * dev,struct component_match ** match,struct device_node * dev_node)195 static void armada_add_endpoints(struct device *dev,
196 struct component_match **match, struct device_node *dev_node)
197 {
198 struct device_node *ep, *remote;
199
200 for_each_endpoint_of_node(dev_node, ep) {
201 remote = of_graph_get_remote_port_parent(ep);
202 if (remote && of_device_is_available(remote))
203 drm_of_component_match_add(dev, match, compare_of,
204 remote);
205 of_node_put(remote);
206 }
207 }
208
209 static const struct component_master_ops armada_master_ops = {
210 .bind = armada_drm_bind,
211 .unbind = armada_drm_unbind,
212 };
213
armada_drm_probe(struct platform_device * pdev)214 static int armada_drm_probe(struct platform_device *pdev)
215 {
216 struct component_match *match = NULL;
217 struct device *dev = &pdev->dev;
218 int ret;
219
220 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
221 if (ret != -EINVAL)
222 return ret;
223
224 if (dev->platform_data) {
225 char **devices = dev->platform_data;
226 struct device *d;
227 int i;
228
229 for (i = 0; devices[i]; i++)
230 component_match_add(dev, &match, compare_dev_name,
231 devices[i]);
232
233 if (i == 0) {
234 dev_err(dev, "missing 'ports' property\n");
235 return -ENODEV;
236 }
237
238 for (i = 0; devices[i]; i++) {
239 d = bus_find_device_by_name(&platform_bus_type, NULL,
240 devices[i]);
241 if (d && d->of_node)
242 armada_add_endpoints(dev, &match, d->of_node);
243 put_device(d);
244 }
245 }
246
247 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
248 match);
249 }
250
armada_drm_remove(struct platform_device * pdev)251 static int armada_drm_remove(struct platform_device *pdev)
252 {
253 component_master_del(&pdev->dev, &armada_master_ops);
254 return 0;
255 }
256
257 static const struct platform_device_id armada_drm_platform_ids[] = {
258 {
259 .name = "armada-drm",
260 }, {
261 .name = "armada-510-drm",
262 },
263 { },
264 };
265 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
266
267 static struct platform_driver armada_drm_platform_driver = {
268 .probe = armada_drm_probe,
269 .remove = armada_drm_remove,
270 .driver = {
271 .name = "armada-drm",
272 },
273 .id_table = armada_drm_platform_ids,
274 };
275
armada_drm_init(void)276 static int __init armada_drm_init(void)
277 {
278 int ret;
279
280 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
281
282 ret = platform_driver_register(&armada_lcd_platform_driver);
283 if (ret)
284 return ret;
285 ret = platform_driver_register(&armada_drm_platform_driver);
286 if (ret)
287 platform_driver_unregister(&armada_lcd_platform_driver);
288 return ret;
289 }
290 module_init(armada_drm_init);
291
armada_drm_exit(void)292 static void __exit armada_drm_exit(void)
293 {
294 platform_driver_unregister(&armada_drm_platform_driver);
295 platform_driver_unregister(&armada_lcd_platform_driver);
296 }
297 module_exit(armada_drm_exit);
298
299 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
300 MODULE_DESCRIPTION("Armada DRM Driver");
301 MODULE_LICENSE("GPL");
302 MODULE_ALIAS("platform:armada-drm");
303