1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2012 Russell King
4 */
5
6 #include <linux/aperture.h>
7 #include <linux/clk.h>
8 #include <linux/component.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/of_graph.h>
12 #include <linux/platform_device.h>
13
14 #include <drm/drm_atomic_helper.h>
15 #include <drm/drm_client_setup.h>
16 #include <drm/drm_drv.h>
17 #include <drm/drm_ioctl.h>
18 #include <drm/drm_managed.h>
19 #include <drm/drm_prime.h>
20 #include <drm/drm_probe_helper.h>
21 #include <drm/drm_of.h>
22 #include <drm/drm_vblank.h>
23
24 #include "armada_crtc.h"
25 #include "armada_drm.h"
26 #include "armada_gem.h"
27 #include "armada_fb.h"
28 #include "armada_hw.h"
29 #include <drm/armada_drm.h>
30 #include "armada_ioctlP.h"
31
32 static const struct drm_ioctl_desc armada_ioctls[] = {
33 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
34 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
35 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
36 };
37
38 DEFINE_DRM_GEM_FOPS(armada_drm_fops);
39
40 static const struct drm_driver armada_drm_driver = {
41 .gem_prime_import = armada_gem_prime_import,
42 .dumb_create = armada_gem_dumb_create,
43 ARMADA_FBDEV_DRIVER_OPS,
44 .major = 1,
45 .minor = 0,
46 .name = "armada-drm",
47 .desc = "Armada SoC DRM",
48 .date = "20120730",
49 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
50 .ioctls = armada_ioctls,
51 .num_ioctls = ARRAY_SIZE(armada_ioctls),
52 .fops = &armada_drm_fops,
53 };
54
55 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
56 .fb_create = armada_fb_create,
57 .atomic_check = drm_atomic_helper_check,
58 .atomic_commit = drm_atomic_helper_commit,
59 };
60
armada_drm_bind(struct device * dev)61 static int armada_drm_bind(struct device *dev)
62 {
63 struct armada_private *priv;
64 struct resource *mem = NULL;
65 int ret, n;
66
67 for (n = 0; ; n++) {
68 struct resource *r = platform_get_resource(to_platform_device(dev),
69 IORESOURCE_MEM, n);
70 if (!r)
71 break;
72
73 /* Resources above 64K are graphics memory */
74 if (resource_size(r) > SZ_64K)
75 mem = r;
76 else
77 return -EINVAL;
78 }
79
80 if (!mem)
81 return -ENXIO;
82
83 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
84 "armada-drm"))
85 return -EBUSY;
86
87 priv = devm_drm_dev_alloc(dev, &armada_drm_driver,
88 struct armada_private, drm);
89 if (IS_ERR(priv)) {
90 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
91 __func__, PTR_ERR(priv));
92 return PTR_ERR(priv);
93 }
94
95 /* Remove early framebuffers */
96 ret = aperture_remove_all_conflicting_devices(armada_drm_driver.name);
97 if (ret) {
98 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
99 __func__, ret);
100 return ret;
101 }
102
103 dev_set_drvdata(dev, &priv->drm);
104
105 /* Mode setting support */
106 drm_mode_config_init(&priv->drm);
107 priv->drm.mode_config.min_width = 320;
108 priv->drm.mode_config.min_height = 200;
109
110 /*
111 * With vscale enabled, the maximum width is 1920 due to the
112 * 1920 by 3 lines RAM
113 */
114 priv->drm.mode_config.max_width = 1920;
115 priv->drm.mode_config.max_height = 2048;
116
117 priv->drm.mode_config.preferred_depth = 24;
118 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
119 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
120 mutex_init(&priv->linear_lock);
121
122 ret = component_bind_all(dev, &priv->drm);
123 if (ret)
124 goto err_kms;
125
126 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
127 if (ret)
128 goto err_comp;
129
130 drm_mode_config_reset(&priv->drm);
131
132 drm_kms_helper_poll_init(&priv->drm);
133
134 ret = drm_dev_register(&priv->drm, 0);
135 if (ret)
136 goto err_poll;
137
138 #ifdef CONFIG_DEBUG_FS
139 armada_drm_debugfs_init(priv->drm.primary);
140 #endif
141
142 drm_client_setup(&priv->drm, NULL);
143
144 return 0;
145
146 err_poll:
147 drm_kms_helper_poll_fini(&priv->drm);
148 err_comp:
149 component_unbind_all(dev, &priv->drm);
150 err_kms:
151 drm_mode_config_cleanup(&priv->drm);
152 drm_mm_takedown(&priv->linear);
153 dev_set_drvdata(dev, NULL);
154 return ret;
155 }
156
armada_drm_unbind(struct device * dev)157 static void armada_drm_unbind(struct device *dev)
158 {
159 struct drm_device *drm = dev_get_drvdata(dev);
160 struct armada_private *priv = drm_to_armada_dev(drm);
161
162 drm_kms_helper_poll_fini(&priv->drm);
163
164 drm_dev_unregister(&priv->drm);
165
166 drm_atomic_helper_shutdown(&priv->drm);
167
168 component_unbind_all(dev, &priv->drm);
169
170 drm_mode_config_cleanup(&priv->drm);
171 drm_mm_takedown(&priv->linear);
172 dev_set_drvdata(dev, NULL);
173 }
174
armada_add_endpoints(struct device * dev,struct component_match ** match,struct device_node * dev_node)175 static void armada_add_endpoints(struct device *dev,
176 struct component_match **match, struct device_node *dev_node)
177 {
178 struct device_node *ep, *remote;
179
180 for_each_endpoint_of_node(dev_node, ep) {
181 remote = of_graph_get_remote_port_parent(ep);
182 if (remote && of_device_is_available(remote))
183 drm_of_component_match_add(dev, match, component_compare_of,
184 remote);
185 of_node_put(remote);
186 }
187 }
188
189 static const struct component_master_ops armada_master_ops = {
190 .bind = armada_drm_bind,
191 .unbind = armada_drm_unbind,
192 };
193
armada_drm_probe(struct platform_device * pdev)194 static int armada_drm_probe(struct platform_device *pdev)
195 {
196 struct component_match *match = NULL;
197 struct device *dev = &pdev->dev;
198 int ret;
199
200 ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops);
201 if (ret != -EINVAL)
202 return ret;
203
204 if (dev->platform_data) {
205 char **devices = dev->platform_data;
206 struct device *d;
207 int i;
208
209 for (i = 0; devices[i]; i++)
210 component_match_add(dev, &match, component_compare_dev_name,
211 devices[i]);
212
213 if (i == 0) {
214 dev_err(dev, "missing 'ports' property\n");
215 return -ENODEV;
216 }
217
218 for (i = 0; devices[i]; i++) {
219 d = bus_find_device_by_name(&platform_bus_type, NULL,
220 devices[i]);
221 if (d && d->of_node)
222 armada_add_endpoints(dev, &match, d->of_node);
223 put_device(d);
224 }
225 }
226
227 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
228 match);
229 }
230
armada_drm_remove(struct platform_device * pdev)231 static void armada_drm_remove(struct platform_device *pdev)
232 {
233 component_master_del(&pdev->dev, &armada_master_ops);
234 }
235
armada_drm_shutdown(struct platform_device * pdev)236 static void armada_drm_shutdown(struct platform_device *pdev)
237 {
238 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
239 }
240
241 static const struct platform_device_id armada_drm_platform_ids[] = {
242 {
243 .name = "armada-drm",
244 }, {
245 .name = "armada-510-drm",
246 },
247 { },
248 };
249 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
250
251 static struct platform_driver armada_drm_platform_driver = {
252 .probe = armada_drm_probe,
253 .remove = armada_drm_remove,
254 .shutdown = armada_drm_shutdown,
255 .driver = {
256 .name = "armada-drm",
257 },
258 .id_table = armada_drm_platform_ids,
259 };
260
armada_drm_init(void)261 static int __init armada_drm_init(void)
262 {
263 int ret;
264
265 if (drm_firmware_drivers_only())
266 return -ENODEV;
267
268 ret = platform_driver_register(&armada_lcd_platform_driver);
269 if (ret)
270 return ret;
271 ret = platform_driver_register(&armada_drm_platform_driver);
272 if (ret)
273 platform_driver_unregister(&armada_lcd_platform_driver);
274 return ret;
275 }
276 module_init(armada_drm_init);
277
armada_drm_exit(void)278 static void __exit armada_drm_exit(void)
279 {
280 platform_driver_unregister(&armada_drm_platform_driver);
281 platform_driver_unregister(&armada_lcd_platform_driver);
282 }
283 module_exit(armada_drm_exit);
284
285 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
286 MODULE_DESCRIPTION("Armada DRM Driver");
287 MODULE_LICENSE("GPL");
288 MODULE_ALIAS("platform:armada-drm");
289