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