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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
96f60e37 RK |
2 | /* |
3 | * Copyright (C) 2012 Russell King | |
96f60e37 | 4 | */ |
25e28ef2 | 5 | |
96f60e37 | 6 | #include <linux/clk.h> |
0101fd00 | 7 | #include <linux/component.h> |
96f60e37 | 8 | #include <linux/module.h> |
0101fd00 | 9 | #include <linux/of_graph.h> |
25e28ef2 SR |
10 | #include <linux/platform_device.h> |
11 | ||
6bd02908 | 12 | #include <drm/drm_atomic_helper.h> |
25e28ef2 SR |
13 | #include <drm/drm_drv.h> |
14 | #include <drm/drm_ioctl.h> | |
15 | #include <drm/drm_prime.h> | |
fcd70cd3 | 16 | #include <drm/drm_probe_helper.h> |
df139288 | 17 | #include <drm/drm_fb_helper.h> |
7fc7e86d | 18 | #include <drm/drm_of.h> |
25e28ef2 SR |
19 | #include <drm/drm_vblank.h> |
20 | ||
96f60e37 RK |
21 | #include "armada_crtc.h" |
22 | #include "armada_drm.h" | |
23 | #include "armada_gem.h" | |
3382a6b9 | 24 | #include "armada_fb.h" |
96f60e37 RK |
25 | #include "armada_hw.h" |
26 | #include <drm/armada_drm.h> | |
27 | #include "armada_ioctlP.h" | |
28 | ||
96f60e37 | 29 | static struct drm_ioctl_desc armada_ioctls[] = { |
f8c47144 DV |
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), | |
96f60e37 RK |
33 | }; |
34 | ||
f42e1819 | 35 | DEFINE_DRM_GEM_FOPS(armada_drm_fops); |
96f60e37 RK |
36 | |
37 | static struct drm_driver armada_drm_driver = { | |
df139288 | 38 | .lastclose = drm_fb_helper_lastclose, |
87adc638 | 39 | .gem_free_object_unlocked = armada_gem_free_object, |
96f60e37 RK |
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, | |
96f60e37 RK |
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", | |
0424fdaf | 51 | .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, |
96f60e37 RK |
52 | .ioctls = armada_ioctls, |
53 | .fops = &armada_drm_fops, | |
54 | }; | |
55 | ||
3382a6b9 RK |
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, | |
6bd02908 RK |
59 | .atomic_check = drm_atomic_helper_check, |
60 | .atomic_commit = drm_atomic_helper_commit, | |
3382a6b9 RK |
61 | }; |
62 | ||
0101fd00 RK |
63 | static int armada_drm_bind(struct device *dev) |
64 | { | |
917a3cbe RK |
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 = kzalloc(sizeof(*priv), GFP_KERNEL); | |
90 | if (!priv) | |
91 | return -ENOMEM; | |
92 | ||
93 | /* | |
94 | * The drm_device structure must be at the start of | |
830aadce | 95 | * armada_private for drm_dev_put() to work correctly. |
917a3cbe RK |
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 | ||
f54a5990 LR |
107 | /* Remove early framebuffers */ |
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 | ||
917a3cbe RK |
118 | priv->drm.dev_private = priv; |
119 | ||
76adb460 | 120 | dev_set_drvdata(dev, &priv->drm); |
917a3cbe | 121 | |
917a3cbe RK |
122 | /* Mode setting support */ |
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 | * With vscale enabled, the maximum width is 1920 due to the | |
129 | * 1920 by 3 lines RAM | |
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 | ||
80c63aee RK |
149 | drm_mode_config_reset(&priv->drm); |
150 | ||
917a3cbe RK |
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 | ||
917a3cbe RK |
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); | |
830aadce | 175 | drm_dev_put(&priv->drm); |
917a3cbe | 176 | return ret; |
0101fd00 RK |
177 | } |
178 | ||
179 | static void armada_drm_unbind(struct device *dev) | |
180 | { | |
917a3cbe RK |
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 | ||
917a3cbe RK |
187 | drm_dev_unregister(&priv->drm); |
188 | ||
0ab17499 RK |
189 | drm_atomic_helper_shutdown(&priv->drm); |
190 | ||
917a3cbe RK |
191 | component_unbind_all(dev, &priv->drm); |
192 | ||
193 | drm_mode_config_cleanup(&priv->drm); | |
194 | drm_mm_takedown(&priv->linear); | |
917a3cbe | 195 | |
830aadce | 196 | drm_dev_put(&priv->drm); |
0101fd00 RK |
197 | } |
198 | ||
199 | static int compare_of(struct device *dev, void *data) | |
200 | { | |
201 | return dev->of_node == data; | |
202 | } | |
203 | ||
204 | static int compare_dev_name(struct device *dev, void *data) | |
205 | { | |
206 | const char *name = data; | |
207 | return !strcmp(dev_name(dev), name); | |
208 | } | |
209 | ||
210 | static void armada_add_endpoints(struct device *dev, | |
989b9a7d | 211 | struct component_match **match, struct device_node *dev_node) |
0101fd00 RK |
212 | { |
213 | struct device_node *ep, *remote; | |
214 | ||
989b9a7d | 215 | for_each_endpoint_of_node(dev_node, ep) { |
0101fd00 | 216 | remote = of_graph_get_remote_port_parent(ep); |
837567c1 RK |
217 | if (remote && of_device_is_available(remote)) |
218 | drm_of_component_match_add(dev, match, compare_of, | |
219 | remote); | |
0101fd00 RK |
220 | of_node_put(remote); |
221 | } | |
222 | } | |
223 | ||
7fc7e86d LD |
224 | static const struct component_master_ops armada_master_ops = { |
225 | .bind = armada_drm_bind, | |
226 | .unbind = armada_drm_unbind, | |
227 | }; | |
0101fd00 | 228 | |
7fc7e86d LD |
229 | static int armada_drm_probe(struct platform_device *pdev) |
230 | { | |
231 | struct component_match *match = NULL; | |
232 | struct device *dev = &pdev->dev; | |
233 | int ret; | |
0101fd00 | 234 | |
7fc7e86d LD |
235 | ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); |
236 | if (ret != -EINVAL) | |
237 | return ret; | |
0101fd00 | 238 | |
7fc7e86d | 239 | if (dev->platform_data) { |
0101fd00 RK |
240 | char **devices = dev->platform_data; |
241 | struct device *d; | |
7fc7e86d | 242 | int i; |
0101fd00 RK |
243 | |
244 | for (i = 0; devices[i]; i++) | |
7fc7e86d | 245 | component_match_add(dev, &match, compare_dev_name, |
0101fd00 RK |
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, | |
7fc7e86d | 255 | devices[i]); |
989b9a7d RK |
256 | if (d && d->of_node) |
257 | armada_add_endpoints(dev, &match, d->of_node); | |
0101fd00 RK |
258 | put_device(d); |
259 | } | |
260 | } | |
261 | ||
0fb2970b RK |
262 | return component_master_add_with_match(&pdev->dev, &armada_master_ops, |
263 | match); | |
96f60e37 RK |
264 | } |
265 | ||
266 | static int armada_drm_remove(struct platform_device *pdev) | |
267 | { | |
0fb2970b | 268 | component_master_del(&pdev->dev, &armada_master_ops); |
96f60e37 RK |
269 | return 0; |
270 | } | |
271 | ||
272 | static const struct platform_device_id armada_drm_platform_ids[] = { | |
273 | { | |
274 | .name = "armada-drm", | |
96f60e37 RK |
275 | }, { |
276 | .name = "armada-510-drm", | |
96f60e37 RK |
277 | }, |
278 | { }, | |
279 | }; | |
280 | MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); | |
281 | ||
282 | static struct platform_driver armada_drm_platform_driver = { | |
283 | .probe = armada_drm_probe, | |
284 | .remove = armada_drm_remove, | |
285 | .driver = { | |
286 | .name = "armada-drm", | |
96f60e37 RK |
287 | }, |
288 | .id_table = armada_drm_platform_ids, | |
289 | }; | |
290 | ||
291 | static int __init armada_drm_init(void) | |
292 | { | |
d8c96083 RK |
293 | int ret; |
294 | ||
f95aeb17 | 295 | armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); |
d8c96083 RK |
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; | |
96f60e37 RK |
304 | } |
305 | module_init(armada_drm_init); | |
306 | ||
307 | static void __exit armada_drm_exit(void) | |
308 | { | |
309 | platform_driver_unregister(&armada_drm_platform_driver); | |
d8c96083 | 310 | platform_driver_unregister(&armada_lcd_platform_driver); |
96f60e37 RK |
311 | } |
312 | module_exit(armada_drm_exit); | |
313 | ||
314 | MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); | |
315 | MODULE_DESCRIPTION("Armada DRM Driver"); | |
316 | MODULE_LICENSE("GPL"); | |
317 | MODULE_ALIAS("platform:armada-drm"); |