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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
31static 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
37DEFINE_DRM_GEM_FOPS(armada_drm_fops);
38
39static 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
53static 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
59static 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 dev_set_drvdata(dev, NULL);
152 return ret;
153}
154
155static void armada_drm_unbind(struct device *dev)
156{
157 struct drm_device *drm = dev_get_drvdata(dev);
158 struct armada_private *priv = drm_to_armada_dev(drm);
159
160 drm_kms_helper_poll_fini(&priv->drm);
161
162 drm_dev_unregister(&priv->drm);
163
164 drm_atomic_helper_shutdown(&priv->drm);
165
166 component_unbind_all(dev, &priv->drm);
167
168 drm_mode_config_cleanup(&priv->drm);
169 drm_mm_takedown(&priv->linear);
170 dev_set_drvdata(dev, NULL);
171}
172
173static void armada_add_endpoints(struct device *dev,
174 struct component_match **match, struct device_node *dev_node)
175{
176 struct device_node *ep, *remote;
177
178 for_each_endpoint_of_node(dev_node, ep) {
179 remote = of_graph_get_remote_port_parent(ep);
180 if (remote && of_device_is_available(remote))
181 drm_of_component_match_add(dev, match, component_compare_of,
182 remote);
183 of_node_put(remote);
184 }
185}
186
187static const struct component_master_ops armada_master_ops = {
188 .bind = armada_drm_bind,
189 .unbind = armada_drm_unbind,
190};
191
192static int armada_drm_probe(struct platform_device *pdev)
193{
194 struct component_match *match = NULL;
195 struct device *dev = &pdev->dev;
196 int ret;
197
198 ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops);
199 if (ret != -EINVAL)
200 return ret;
201
202 if (dev->platform_data) {
203 char **devices = dev->platform_data;
204 struct device *d;
205 int i;
206
207 for (i = 0; devices[i]; i++)
208 component_match_add(dev, &match, component_compare_dev_name,
209 devices[i]);
210
211 if (i == 0) {
212 dev_err(dev, "missing 'ports' property\n");
213 return -ENODEV;
214 }
215
216 for (i = 0; devices[i]; i++) {
217 d = bus_find_device_by_name(&platform_bus_type, NULL,
218 devices[i]);
219 if (d && d->of_node)
220 armada_add_endpoints(dev, &match, d->of_node);
221 put_device(d);
222 }
223 }
224
225 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
226 match);
227}
228
229static void armada_drm_remove(struct platform_device *pdev)
230{
231 component_master_del(&pdev->dev, &armada_master_ops);
232}
233
234static void armada_drm_shutdown(struct platform_device *pdev)
235{
236 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
237}
238
239static const struct platform_device_id armada_drm_platform_ids[] = {
240 {
241 .name = "armada-drm",
242 }, {
243 .name = "armada-510-drm",
244 },
245 { },
246};
247MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
248
249static struct platform_driver armada_drm_platform_driver = {
250 .probe = armada_drm_probe,
251 .remove_new = armada_drm_remove,
252 .shutdown = armada_drm_shutdown,
253 .driver = {
254 .name = "armada-drm",
255 },
256 .id_table = armada_drm_platform_ids,
257};
258
259static int __init armada_drm_init(void)
260{
261 int ret;
262
263 if (drm_firmware_drivers_only())
264 return -ENODEV;
265
266 ret = platform_driver_register(&armada_lcd_platform_driver);
267 if (ret)
268 return ret;
269 ret = platform_driver_register(&armada_drm_platform_driver);
270 if (ret)
271 platform_driver_unregister(&armada_lcd_platform_driver);
272 return ret;
273}
274module_init(armada_drm_init);
275
276static void __exit armada_drm_exit(void)
277{
278 platform_driver_unregister(&armada_drm_platform_driver);
279 platform_driver_unregister(&armada_lcd_platform_driver);
280}
281module_exit(armada_drm_exit);
282
283MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
284MODULE_DESCRIPTION("Armada DRM Driver");
285MODULE_LICENSE("GPL");
286MODULE_ALIAS("platform:armada-drm");
1/*
2 * Copyright (C) 2012 Russell King
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/module.h>
11#include <linux/of_graph.h>
12#include <drm/drm_crtc_helper.h>
13#include <drm/drm_fb_helper.h>
14#include <drm/drm_of.h>
15#include "armada_crtc.h"
16#include "armada_drm.h"
17#include "armada_gem.h"
18#include "armada_hw.h"
19#include <drm/armada_drm.h>
20#include "armada_ioctlP.h"
21
22static void armada_drm_unref_work(struct work_struct *work)
23{
24 struct armada_private *priv =
25 container_of(work, struct armada_private, fb_unref_work);
26 struct drm_framebuffer *fb;
27
28 while (kfifo_get(&priv->fb_unref, &fb))
29 drm_framebuffer_put(fb);
30}
31
32/* Must be called with dev->event_lock held */
33void __armada_drm_queue_unref_work(struct drm_device *dev,
34 struct drm_framebuffer *fb)
35{
36 struct armada_private *priv = dev->dev_private;
37
38 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
39 schedule_work(&priv->fb_unref_work);
40}
41
42void armada_drm_queue_unref_work(struct drm_device *dev,
43 struct drm_framebuffer *fb)
44{
45 unsigned long flags;
46
47 spin_lock_irqsave(&dev->event_lock, flags);
48 __armada_drm_queue_unref_work(dev, fb);
49 spin_unlock_irqrestore(&dev->event_lock, flags);
50}
51
52static struct drm_ioctl_desc armada_ioctls[] = {
53 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
54 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
55 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
56};
57
58DEFINE_DRM_GEM_FOPS(armada_drm_fops);
59
60static struct drm_driver armada_drm_driver = {
61 .lastclose = drm_fb_helper_lastclose,
62 .gem_free_object_unlocked = armada_gem_free_object,
63 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
64 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
65 .gem_prime_export = armada_gem_prime_export,
66 .gem_prime_import = armada_gem_prime_import,
67 .dumb_create = armada_gem_dumb_create,
68 .gem_vm_ops = &armada_gem_vm_ops,
69 .major = 1,
70 .minor = 0,
71 .name = "armada-drm",
72 .desc = "Armada SoC DRM",
73 .date = "20120730",
74 .driver_features = DRIVER_GEM | DRIVER_MODESET |
75 DRIVER_PRIME,
76 .ioctls = armada_ioctls,
77 .fops = &armada_drm_fops,
78};
79
80static int armada_drm_bind(struct device *dev)
81{
82 struct armada_private *priv;
83 struct resource *mem = NULL;
84 int ret, n;
85
86 for (n = 0; ; n++) {
87 struct resource *r = platform_get_resource(to_platform_device(dev),
88 IORESOURCE_MEM, n);
89 if (!r)
90 break;
91
92 /* Resources above 64K are graphics memory */
93 if (resource_size(r) > SZ_64K)
94 mem = r;
95 else
96 return -EINVAL;
97 }
98
99 if (!mem)
100 return -ENXIO;
101
102 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
103 "armada-drm"))
104 return -EBUSY;
105
106 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
107 if (!priv)
108 return -ENOMEM;
109
110 /*
111 * The drm_device structure must be at the start of
112 * armada_private for drm_dev_unref() to work correctly.
113 */
114 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
115
116 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
117 if (ret) {
118 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
119 __func__, ret);
120 kfree(priv);
121 return ret;
122 }
123
124 priv->drm.dev_private = priv;
125
126 dev_set_drvdata(dev, &priv->drm);
127
128 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
129 INIT_KFIFO(priv->fb_unref);
130
131 /* Mode setting support */
132 drm_mode_config_init(&priv->drm);
133 priv->drm.mode_config.min_width = 320;
134 priv->drm.mode_config.min_height = 200;
135
136 /*
137 * With vscale enabled, the maximum width is 1920 due to the
138 * 1920 by 3 lines RAM
139 */
140 priv->drm.mode_config.max_width = 1920;
141 priv->drm.mode_config.max_height = 2048;
142
143 priv->drm.mode_config.preferred_depth = 24;
144 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
145 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
146 mutex_init(&priv->linear_lock);
147
148 ret = component_bind_all(dev, &priv->drm);
149 if (ret)
150 goto err_kms;
151
152 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
153 if (ret)
154 goto err_comp;
155
156 priv->drm.irq_enabled = true;
157
158 ret = armada_fbdev_init(&priv->drm);
159 if (ret)
160 goto err_comp;
161
162 drm_kms_helper_poll_init(&priv->drm);
163
164 ret = drm_dev_register(&priv->drm, 0);
165 if (ret)
166 goto err_poll;
167
168#ifdef CONFIG_DEBUG_FS
169 armada_drm_debugfs_init(priv->drm.primary);
170#endif
171
172 return 0;
173
174 err_poll:
175 drm_kms_helper_poll_fini(&priv->drm);
176 armada_fbdev_fini(&priv->drm);
177 err_comp:
178 component_unbind_all(dev, &priv->drm);
179 err_kms:
180 drm_mode_config_cleanup(&priv->drm);
181 drm_mm_takedown(&priv->linear);
182 flush_work(&priv->fb_unref_work);
183 drm_dev_unref(&priv->drm);
184 return ret;
185}
186
187static void armada_drm_unbind(struct device *dev)
188{
189 struct drm_device *drm = dev_get_drvdata(dev);
190 struct armada_private *priv = drm->dev_private;
191
192 drm_kms_helper_poll_fini(&priv->drm);
193 armada_fbdev_fini(&priv->drm);
194
195 drm_dev_unregister(&priv->drm);
196
197 component_unbind_all(dev, &priv->drm);
198
199 drm_mode_config_cleanup(&priv->drm);
200 drm_mm_takedown(&priv->linear);
201 flush_work(&priv->fb_unref_work);
202
203 drm_dev_unref(&priv->drm);
204}
205
206static int compare_of(struct device *dev, void *data)
207{
208 return dev->of_node == data;
209}
210
211static int compare_dev_name(struct device *dev, void *data)
212{
213 const char *name = data;
214 return !strcmp(dev_name(dev), name);
215}
216
217static void armada_add_endpoints(struct device *dev,
218 struct component_match **match, struct device_node *port)
219{
220 struct device_node *ep, *remote;
221
222 for_each_child_of_node(port, ep) {
223 remote = of_graph_get_remote_port_parent(ep);
224 if (!remote || !of_device_is_available(remote)) {
225 of_node_put(remote);
226 continue;
227 } else if (!of_device_is_available(remote->parent)) {
228 dev_warn(dev, "parent device of %pOF is not available\n",
229 remote);
230 of_node_put(remote);
231 continue;
232 }
233
234 drm_of_component_match_add(dev, match, compare_of, remote);
235 of_node_put(remote);
236 }
237}
238
239static const struct component_master_ops armada_master_ops = {
240 .bind = armada_drm_bind,
241 .unbind = armada_drm_unbind,
242};
243
244static int armada_drm_probe(struct platform_device *pdev)
245{
246 struct component_match *match = NULL;
247 struct device *dev = &pdev->dev;
248 int ret;
249
250 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
251 if (ret != -EINVAL)
252 return ret;
253
254 if (dev->platform_data) {
255 char **devices = dev->platform_data;
256 struct device_node *port;
257 struct device *d;
258 int i;
259
260 for (i = 0; devices[i]; i++)
261 component_match_add(dev, &match, compare_dev_name,
262 devices[i]);
263
264 if (i == 0) {
265 dev_err(dev, "missing 'ports' property\n");
266 return -ENODEV;
267 }
268
269 for (i = 0; devices[i]; i++) {
270 d = bus_find_device_by_name(&platform_bus_type, NULL,
271 devices[i]);
272 if (d && d->of_node) {
273 for_each_child_of_node(d->of_node, port)
274 armada_add_endpoints(dev, &match, port);
275 }
276 put_device(d);
277 }
278 }
279
280 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
281 match);
282}
283
284static int armada_drm_remove(struct platform_device *pdev)
285{
286 component_master_del(&pdev->dev, &armada_master_ops);
287 return 0;
288}
289
290static const struct platform_device_id armada_drm_platform_ids[] = {
291 {
292 .name = "armada-drm",
293 }, {
294 .name = "armada-510-drm",
295 },
296 { },
297};
298MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
299
300static struct platform_driver armada_drm_platform_driver = {
301 .probe = armada_drm_probe,
302 .remove = armada_drm_remove,
303 .driver = {
304 .name = "armada-drm",
305 },
306 .id_table = armada_drm_platform_ids,
307};
308
309static int __init armada_drm_init(void)
310{
311 int ret;
312
313 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
314
315 ret = platform_driver_register(&armada_lcd_platform_driver);
316 if (ret)
317 return ret;
318 ret = platform_driver_register(&armada_drm_platform_driver);
319 if (ret)
320 platform_driver_unregister(&armada_lcd_platform_driver);
321 return ret;
322}
323module_init(armada_drm_init);
324
325static void __exit armada_drm_exit(void)
326{
327 platform_driver_unregister(&armada_drm_platform_driver);
328 platform_driver_unregister(&armada_lcd_platform_driver);
329}
330module_exit(armada_drm_exit);
331
332MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
333MODULE_DESCRIPTION("Armada DRM Driver");
334MODULE_LICENSE("GPL");
335MODULE_ALIAS("platform:armada-drm");