2 * Copyright (C) 2012 Russell King
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.
9 #include <linux/component.h>
10 #include <linux/module.h>
11 #include <linux/of_graph.h>
13 #include <drm/drm_crtc_helper.h>
14 #include "armada_crtc.h"
15 #include "armada_drm.h"
16 #include "armada_gem.h"
17 #include "armada_hw.h"
18 #include <drm/armada_drm.h>
19 #include "armada_ioctlP.h"
21 static void armada_drm_unref_work(struct work_struct *work)
23 struct armada_private *priv =
24 container_of(work, struct armada_private, fb_unref_work);
25 struct drm_framebuffer *fb;
27 while (kfifo_get(&priv->fb_unref, &fb))
28 drm_framebuffer_unreference(fb);
31 /* Must be called with dev->event_lock held */
32 void __armada_drm_queue_unref_work(struct drm_device *dev,
33 struct drm_framebuffer *fb)
35 struct armada_private *priv = dev->dev_private;
37 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
38 schedule_work(&priv->fb_unref_work);
41 void armada_drm_queue_unref_work(struct drm_device *dev,
42 struct drm_framebuffer *fb)
46 spin_lock_irqsave(&dev->event_lock, flags);
47 __armada_drm_queue_unref_work(dev, fb);
48 spin_unlock_irqrestore(&dev->event_lock, flags);
51 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
53 struct armada_private *priv;
54 struct resource *mem = NULL;
58 struct resource *r = platform_get_resource(dev->platformdev,
63 /* Resources above 64K are graphics memory */
64 if (resource_size(r) > SZ_64K)
73 if (!devm_request_mem_region(dev->dev, mem->start,
74 resource_size(mem), "armada-drm"))
77 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
79 DRM_ERROR("failed to allocate private\n");
83 platform_set_drvdata(dev->platformdev, dev);
84 dev->dev_private = priv;
86 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
87 INIT_KFIFO(priv->fb_unref);
89 /* Mode setting support */
90 drm_mode_config_init(dev);
91 dev->mode_config.min_width = 320;
92 dev->mode_config.min_height = 200;
95 * With vscale enabled, the maximum width is 1920 due to the
98 dev->mode_config.max_width = 1920;
99 dev->mode_config.max_height = 2048;
101 dev->mode_config.preferred_depth = 24;
102 dev->mode_config.funcs = &armada_drm_mode_config_funcs;
103 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
105 ret = component_bind_all(dev->dev, dev);
109 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
113 dev->irq_enabled = true;
114 dev->vblank_disable_allowed = 1;
116 ret = armada_fbdev_init(dev);
120 drm_kms_helper_poll_init(dev);
125 component_unbind_all(dev->dev, dev);
127 drm_mode_config_cleanup(dev);
128 drm_mm_takedown(&priv->linear);
129 flush_work(&priv->fb_unref_work);
134 static int armada_drm_unload(struct drm_device *dev)
136 struct armada_private *priv = dev->dev_private;
138 drm_kms_helper_poll_fini(dev);
139 armada_fbdev_fini(dev);
141 component_unbind_all(dev->dev, dev);
143 drm_mode_config_cleanup(dev);
144 drm_mm_takedown(&priv->linear);
145 flush_work(&priv->fb_unref_work);
146 dev->dev_private = NULL;
151 /* These are called under the vbl_lock. */
152 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
154 struct armada_private *priv = dev->dev_private;
155 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
159 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
161 struct armada_private *priv = dev->dev_private;
162 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
165 static struct drm_ioctl_desc armada_ioctls[] = {
166 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
168 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
170 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
174 static void armada_drm_lastclose(struct drm_device *dev)
176 armada_fbdev_lastclose(dev);
179 static const struct file_operations armada_drm_fops = {
180 .owner = THIS_MODULE,
184 .unlocked_ioctl = drm_ioctl,
185 .mmap = drm_gem_mmap,
187 .release = drm_release,
190 static struct drm_driver armada_drm_driver = {
191 .load = armada_drm_load,
195 .lastclose = armada_drm_lastclose,
196 .unload = armada_drm_unload,
197 .set_busid = drm_platform_set_busid,
198 .get_vblank_counter = drm_vblank_count,
199 .enable_vblank = armada_drm_enable_vblank,
200 .disable_vblank = armada_drm_disable_vblank,
201 #ifdef CONFIG_DEBUG_FS
202 .debugfs_init = armada_drm_debugfs_init,
203 .debugfs_cleanup = armada_drm_debugfs_cleanup,
205 .gem_free_object = armada_gem_free_object,
206 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
207 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
208 .gem_prime_export = armada_gem_prime_export,
209 .gem_prime_import = armada_gem_prime_import,
210 .dumb_create = armada_gem_dumb_create,
211 .dumb_map_offset = armada_gem_dumb_map_offset,
212 .dumb_destroy = armada_gem_dumb_destroy,
213 .gem_vm_ops = &armada_gem_vm_ops,
216 .name = "armada-drm",
217 .desc = "Armada SoC DRM",
219 .driver_features = DRIVER_GEM | DRIVER_MODESET |
220 DRIVER_HAVE_IRQ | DRIVER_PRIME,
221 .ioctls = armada_ioctls,
222 .fops = &armada_drm_fops,
225 static int armada_drm_bind(struct device *dev)
227 return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
230 static void armada_drm_unbind(struct device *dev)
232 drm_put_dev(dev_get_drvdata(dev));
235 static int compare_of(struct device *dev, void *data)
237 return dev->of_node == data;
240 static int compare_dev_name(struct device *dev, void *data)
242 const char *name = data;
243 return !strcmp(dev_name(dev), name);
246 static void armada_add_endpoints(struct device *dev,
247 struct component_match **match, struct device_node *port)
249 struct device_node *ep, *remote;
251 for_each_child_of_node(port, ep) {
252 remote = of_graph_get_remote_port_parent(ep);
253 if (!remote || !of_device_is_available(remote)) {
256 } else if (!of_device_is_available(remote->parent)) {
257 dev_warn(dev, "parent device of %s is not available\n",
263 component_match_add(dev, match, compare_of, remote);
268 static int armada_drm_find_components(struct device *dev,
269 struct component_match **match)
271 struct device_node *port;
275 struct device_node *np = dev->of_node;
278 port = of_parse_phandle(np, "ports", i);
282 component_match_add(dev, match, compare_of, port);
287 dev_err(dev, "missing 'ports' property\n");
292 port = of_parse_phandle(np, "ports", i);
296 armada_add_endpoints(dev, match, port);
299 } else if (dev->platform_data) {
300 char **devices = dev->platform_data;
303 for (i = 0; devices[i]; i++)
304 component_match_add(dev, match, compare_dev_name,
308 dev_err(dev, "missing 'ports' property\n");
312 for (i = 0; devices[i]; i++) {
313 d = bus_find_device_by_name(&platform_bus_type, NULL,
315 if (d && d->of_node) {
316 for_each_child_of_node(d->of_node, port)
317 armada_add_endpoints(dev, match, port);
326 static const struct component_master_ops armada_master_ops = {
327 .bind = armada_drm_bind,
328 .unbind = armada_drm_unbind,
331 static int armada_drm_probe(struct platform_device *pdev)
333 struct component_match *match = NULL;
336 ret = armada_drm_find_components(&pdev->dev, &match);
340 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
344 static int armada_drm_remove(struct platform_device *pdev)
346 component_master_del(&pdev->dev, &armada_master_ops);
350 static const struct platform_device_id armada_drm_platform_ids[] = {
352 .name = "armada-drm",
354 .name = "armada-510-drm",
358 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
360 static struct platform_driver armada_drm_platform_driver = {
361 .probe = armada_drm_probe,
362 .remove = armada_drm_remove,
364 .name = "armada-drm",
366 .id_table = armada_drm_platform_ids,
369 static int __init armada_drm_init(void)
373 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
375 ret = platform_driver_register(&armada_lcd_platform_driver);
378 ret = platform_driver_register(&armada_drm_platform_driver);
380 platform_driver_unregister(&armada_lcd_platform_driver);
383 module_init(armada_drm_init);
385 static void __exit armada_drm_exit(void)
387 platform_driver_unregister(&armada_drm_platform_driver);
388 platform_driver_unregister(&armada_lcd_platform_driver);
390 module_exit(armada_drm_exit);
392 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
393 MODULE_DESCRIPTION("Armada DRM Driver");
394 MODULE_LICENSE("GPL");
395 MODULE_ALIAS("platform:armada-drm");