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