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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/drmP.h>
13#include <drm/drm_crtc_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_unreference(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 int armada_drm_load(struct drm_device *dev, unsigned long flags)
53{
54 struct armada_private *priv;
55 struct resource *mem = NULL;
56 int ret, n;
57
58 for (n = 0; ; n++) {
59 struct resource *r = platform_get_resource(dev->platformdev,
60 IORESOURCE_MEM, n);
61 if (!r)
62 break;
63
64 /* Resources above 64K are graphics memory */
65 if (resource_size(r) > SZ_64K)
66 mem = r;
67 else
68 return -EINVAL;
69 }
70
71 if (!mem)
72 return -ENXIO;
73
74 if (!devm_request_mem_region(dev->dev, mem->start,
75 resource_size(mem), "armada-drm"))
76 return -EBUSY;
77
78 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
79 if (!priv) {
80 DRM_ERROR("failed to allocate private\n");
81 return -ENOMEM;
82 }
83
84 platform_set_drvdata(dev->platformdev, dev);
85 dev->dev_private = priv;
86
87 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
88 INIT_KFIFO(priv->fb_unref);
89
90 /* Mode setting support */
91 drm_mode_config_init(dev);
92 dev->mode_config.min_width = 320;
93 dev->mode_config.min_height = 200;
94
95 /*
96 * With vscale enabled, the maximum width is 1920 due to the
97 * 1920 by 3 lines RAM
98 */
99 dev->mode_config.max_width = 1920;
100 dev->mode_config.max_height = 2048;
101
102 dev->mode_config.preferred_depth = 24;
103 dev->mode_config.funcs = &armada_drm_mode_config_funcs;
104 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
105 mutex_init(&priv->linear_lock);
106
107 ret = component_bind_all(dev->dev, dev);
108 if (ret)
109 goto err_kms;
110
111 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
112 if (ret)
113 goto err_comp;
114
115 dev->irq_enabled = true;
116 dev->vblank_disable_allowed = 1;
117
118 ret = armada_fbdev_init(dev);
119 if (ret)
120 goto err_comp;
121
122 drm_kms_helper_poll_init(dev);
123
124 return 0;
125
126 err_comp:
127 component_unbind_all(dev->dev, dev);
128 err_kms:
129 drm_mode_config_cleanup(dev);
130 drm_mm_takedown(&priv->linear);
131 flush_work(&priv->fb_unref_work);
132
133 return ret;
134}
135
136static int armada_drm_unload(struct drm_device *dev)
137{
138 struct armada_private *priv = dev->dev_private;
139
140 drm_kms_helper_poll_fini(dev);
141 armada_fbdev_fini(dev);
142
143 component_unbind_all(dev->dev, dev);
144
145 drm_mode_config_cleanup(dev);
146 drm_mm_takedown(&priv->linear);
147 flush_work(&priv->fb_unref_work);
148 dev->dev_private = NULL;
149
150 return 0;
151}
152
153/* These are called under the vbl_lock. */
154static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
155{
156 struct armada_private *priv = dev->dev_private;
157 armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
158 return 0;
159}
160
161static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe)
162{
163 struct armada_private *priv = dev->dev_private;
164 armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
165}
166
167static struct drm_ioctl_desc armada_ioctls[] = {
168 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
169 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
170 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
171};
172
173static void armada_drm_lastclose(struct drm_device *dev)
174{
175 armada_fbdev_lastclose(dev);
176}
177
178static const struct file_operations armada_drm_fops = {
179 .owner = THIS_MODULE,
180 .llseek = no_llseek,
181 .read = drm_read,
182 .poll = drm_poll,
183 .unlocked_ioctl = drm_ioctl,
184 .mmap = drm_gem_mmap,
185 .open = drm_open,
186 .release = drm_release,
187};
188
189static struct drm_driver armada_drm_driver = {
190 .load = armada_drm_load,
191 .lastclose = armada_drm_lastclose,
192 .unload = armada_drm_unload,
193 .set_busid = drm_platform_set_busid,
194 .get_vblank_counter = drm_vblank_no_hw_counter,
195 .enable_vblank = armada_drm_enable_vblank,
196 .disable_vblank = armada_drm_disable_vblank,
197#ifdef CONFIG_DEBUG_FS
198 .debugfs_init = armada_drm_debugfs_init,
199 .debugfs_cleanup = armada_drm_debugfs_cleanup,
200#endif
201 .gem_free_object = armada_gem_free_object,
202 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
203 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
204 .gem_prime_export = armada_gem_prime_export,
205 .gem_prime_import = armada_gem_prime_import,
206 .dumb_create = armada_gem_dumb_create,
207 .dumb_map_offset = armada_gem_dumb_map_offset,
208 .dumb_destroy = armada_gem_dumb_destroy,
209 .gem_vm_ops = &armada_gem_vm_ops,
210 .major = 1,
211 .minor = 0,
212 .name = "armada-drm",
213 .desc = "Armada SoC DRM",
214 .date = "20120730",
215 .driver_features = DRIVER_GEM | DRIVER_MODESET |
216 DRIVER_HAVE_IRQ | DRIVER_PRIME,
217 .ioctls = armada_ioctls,
218 .fops = &armada_drm_fops,
219};
220
221static int armada_drm_bind(struct device *dev)
222{
223 return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
224}
225
226static void armada_drm_unbind(struct device *dev)
227{
228 drm_put_dev(dev_get_drvdata(dev));
229}
230
231static int compare_of(struct device *dev, void *data)
232{
233 return dev->of_node == data;
234}
235
236static int compare_dev_name(struct device *dev, void *data)
237{
238 const char *name = data;
239 return !strcmp(dev_name(dev), name);
240}
241
242static void armada_add_endpoints(struct device *dev,
243 struct component_match **match, struct device_node *port)
244{
245 struct device_node *ep, *remote;
246
247 for_each_child_of_node(port, ep) {
248 remote = of_graph_get_remote_port_parent(ep);
249 if (!remote || !of_device_is_available(remote)) {
250 of_node_put(remote);
251 continue;
252 } else if (!of_device_is_available(remote->parent)) {
253 dev_warn(dev, "parent device of %s is not available\n",
254 remote->full_name);
255 of_node_put(remote);
256 continue;
257 }
258
259 component_match_add(dev, match, compare_of, remote);
260 of_node_put(remote);
261 }
262}
263
264static const struct component_master_ops armada_master_ops = {
265 .bind = armada_drm_bind,
266 .unbind = armada_drm_unbind,
267};
268
269static int armada_drm_probe(struct platform_device *pdev)
270{
271 struct component_match *match = NULL;
272 struct device *dev = &pdev->dev;
273 int ret;
274
275 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
276 if (ret != -EINVAL)
277 return ret;
278
279 if (dev->platform_data) {
280 char **devices = dev->platform_data;
281 struct device_node *port;
282 struct device *d;
283 int i;
284
285 for (i = 0; devices[i]; i++)
286 component_match_add(dev, &match, compare_dev_name,
287 devices[i]);
288
289 if (i == 0) {
290 dev_err(dev, "missing 'ports' property\n");
291 return -ENODEV;
292 }
293
294 for (i = 0; devices[i]; i++) {
295 d = bus_find_device_by_name(&platform_bus_type, NULL,
296 devices[i]);
297 if (d && d->of_node) {
298 for_each_child_of_node(d->of_node, port)
299 armada_add_endpoints(dev, &match, port);
300 }
301 put_device(d);
302 }
303 }
304
305 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
306 match);
307}
308
309static int armada_drm_remove(struct platform_device *pdev)
310{
311 component_master_del(&pdev->dev, &armada_master_ops);
312 return 0;
313}
314
315static const struct platform_device_id armada_drm_platform_ids[] = {
316 {
317 .name = "armada-drm",
318 }, {
319 .name = "armada-510-drm",
320 },
321 { },
322};
323MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
324
325static struct platform_driver armada_drm_platform_driver = {
326 .probe = armada_drm_probe,
327 .remove = armada_drm_remove,
328 .driver = {
329 .name = "armada-drm",
330 },
331 .id_table = armada_drm_platform_ids,
332};
333
334static int __init armada_drm_init(void)
335{
336 int ret;
337
338 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
339
340 ret = platform_driver_register(&armada_lcd_platform_driver);
341 if (ret)
342 return ret;
343 ret = platform_driver_register(&armada_drm_platform_driver);
344 if (ret)
345 platform_driver_unregister(&armada_lcd_platform_driver);
346 return ret;
347}
348module_init(armada_drm_init);
349
350static void __exit armada_drm_exit(void)
351{
352 platform_driver_unregister(&armada_drm_platform_driver);
353 platform_driver_unregister(&armada_lcd_platform_driver);
354}
355module_exit(armada_drm_exit);
356
357MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
358MODULE_DESCRIPTION("Armada DRM Driver");
359MODULE_LICENSE("GPL");
360MODULE_ALIAS("platform:armada-drm");
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
32static 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
38DEFINE_DRM_GEM_FOPS(armada_drm_fops);
39
40static 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
55static 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
61static 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
157static 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
175static 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
189static const struct component_master_ops armada_master_ops = {
190 .bind = armada_drm_bind,
191 .unbind = armada_drm_unbind,
192};
193
194static 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
231static void armada_drm_remove(struct platform_device *pdev)
232{
233 component_master_del(&pdev->dev, &armada_master_ops);
234}
235
236static void armada_drm_shutdown(struct platform_device *pdev)
237{
238 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
239}
240
241static const struct platform_device_id armada_drm_platform_ids[] = {
242 {
243 .name = "armada-drm",
244 }, {
245 .name = "armada-510-drm",
246 },
247 { },
248};
249MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
250
251static 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
261static 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}
276module_init(armada_drm_init);
277
278static void __exit armada_drm_exit(void)
279{
280 platform_driver_unregister(&armada_drm_platform_driver);
281 platform_driver_unregister(&armada_lcd_platform_driver);
282}
283module_exit(armada_drm_exit);
284
285MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
286MODULE_DESCRIPTION("Armada DRM Driver");
287MODULE_LICENSE("GPL");
288MODULE_ALIAS("platform:armada-drm");