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 <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"
22 static void armada_drm_unref_work(struct work_struct *work)
24 struct armada_private *priv =
25 container_of(work, struct armada_private, fb_unref_work);
26 struct drm_framebuffer *fb;
28 while (kfifo_get(&priv->fb_unref, &fb))
29 drm_framebuffer_unreference(fb);
32 /* Must be called with dev->event_lock held */
33 void __armada_drm_queue_unref_work(struct drm_device *dev,
34 struct drm_framebuffer *fb)
36 struct armada_private *priv = dev->dev_private;
38 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
39 schedule_work(&priv->fb_unref_work);
42 void armada_drm_queue_unref_work(struct drm_device *dev,
43 struct drm_framebuffer *fb)
47 spin_lock_irqsave(&dev->event_lock, flags);
48 __armada_drm_queue_unref_work(dev, fb);
49 spin_unlock_irqrestore(&dev->event_lock, flags);
52 /* These are called under the vbl_lock. */
53 static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
55 struct armada_private *priv = dev->dev_private;
56 armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
60 static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe)
62 struct armada_private *priv = dev->dev_private;
63 armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
66 static struct drm_ioctl_desc armada_ioctls[] = {
67 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
68 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
69 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
72 static void armada_drm_lastclose(struct drm_device *dev)
74 armada_fbdev_lastclose(dev);
77 static const struct file_operations armada_drm_fops = {
82 .unlocked_ioctl = drm_ioctl,
85 .release = drm_release,
88 static struct drm_driver armada_drm_driver = {
89 .lastclose = armada_drm_lastclose,
90 .get_vblank_counter = drm_vblank_no_hw_counter,
91 .enable_vblank = armada_drm_enable_vblank,
92 .disable_vblank = armada_drm_disable_vblank,
93 .gem_free_object_unlocked = armada_gem_free_object,
94 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
95 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
96 .gem_prime_export = armada_gem_prime_export,
97 .gem_prime_import = armada_gem_prime_import,
98 .dumb_create = armada_gem_dumb_create,
99 .dumb_map_offset = armada_gem_dumb_map_offset,
100 .dumb_destroy = armada_gem_dumb_destroy,
101 .gem_vm_ops = &armada_gem_vm_ops,
104 .name = "armada-drm",
105 .desc = "Armada SoC DRM",
107 .driver_features = DRIVER_GEM | DRIVER_MODESET |
109 .ioctls = armada_ioctls,
110 .fops = &armada_drm_fops,
113 static int armada_drm_bind(struct device *dev)
115 struct armada_private *priv;
116 struct resource *mem = NULL;
120 struct resource *r = platform_get_resource(to_platform_device(dev),
125 /* Resources above 64K are graphics memory */
126 if (resource_size(r) > SZ_64K)
135 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
139 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
144 * The drm_device structure must be at the start of
145 * armada_private for drm_dev_unref() to work correctly.
147 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
149 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
151 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
157 priv->drm.platformdev = to_platform_device(dev);
158 priv->drm.dev_private = priv;
160 platform_set_drvdata(priv->drm.platformdev, &priv->drm);
162 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
163 INIT_KFIFO(priv->fb_unref);
165 /* Mode setting support */
166 drm_mode_config_init(&priv->drm);
167 priv->drm.mode_config.min_width = 320;
168 priv->drm.mode_config.min_height = 200;
171 * With vscale enabled, the maximum width is 1920 due to the
172 * 1920 by 3 lines RAM
174 priv->drm.mode_config.max_width = 1920;
175 priv->drm.mode_config.max_height = 2048;
177 priv->drm.mode_config.preferred_depth = 24;
178 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
179 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
180 mutex_init(&priv->linear_lock);
182 ret = component_bind_all(dev, &priv->drm);
186 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
190 priv->drm.irq_enabled = true;
192 ret = armada_fbdev_init(&priv->drm);
196 drm_kms_helper_poll_init(&priv->drm);
198 ret = drm_dev_register(&priv->drm, 0);
202 #ifdef CONFIG_DEBUG_FS
203 armada_drm_debugfs_init(priv->drm.primary);
209 drm_kms_helper_poll_fini(&priv->drm);
210 armada_fbdev_fini(&priv->drm);
212 component_unbind_all(dev, &priv->drm);
214 drm_mode_config_cleanup(&priv->drm);
215 drm_mm_takedown(&priv->linear);
216 flush_work(&priv->fb_unref_work);
217 drm_dev_unref(&priv->drm);
221 static void armada_drm_unbind(struct device *dev)
223 struct drm_device *drm = dev_get_drvdata(dev);
224 struct armada_private *priv = drm->dev_private;
226 drm_kms_helper_poll_fini(&priv->drm);
227 armada_fbdev_fini(&priv->drm);
229 #ifdef CONFIG_DEBUG_FS
230 armada_drm_debugfs_cleanup(priv->drm.primary);
232 drm_dev_unregister(&priv->drm);
234 component_unbind_all(dev, &priv->drm);
236 drm_mode_config_cleanup(&priv->drm);
237 drm_mm_takedown(&priv->linear);
238 flush_work(&priv->fb_unref_work);
240 drm_dev_unref(&priv->drm);
243 static int compare_of(struct device *dev, void *data)
245 return dev->of_node == data;
248 static int compare_dev_name(struct device *dev, void *data)
250 const char *name = data;
251 return !strcmp(dev_name(dev), name);
254 static void armada_add_endpoints(struct device *dev,
255 struct component_match **match, struct device_node *port)
257 struct device_node *ep, *remote;
259 for_each_child_of_node(port, ep) {
260 remote = of_graph_get_remote_port_parent(ep);
261 if (!remote || !of_device_is_available(remote)) {
264 } else if (!of_device_is_available(remote->parent)) {
265 dev_warn(dev, "parent device of %s is not available\n",
271 drm_of_component_match_add(dev, match, compare_of, remote);
276 static const struct component_master_ops armada_master_ops = {
277 .bind = armada_drm_bind,
278 .unbind = armada_drm_unbind,
281 static int armada_drm_probe(struct platform_device *pdev)
283 struct component_match *match = NULL;
284 struct device *dev = &pdev->dev;
287 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
291 if (dev->platform_data) {
292 char **devices = dev->platform_data;
293 struct device_node *port;
297 for (i = 0; devices[i]; i++)
298 component_match_add(dev, &match, compare_dev_name,
302 dev_err(dev, "missing 'ports' property\n");
306 for (i = 0; devices[i]; i++) {
307 d = bus_find_device_by_name(&platform_bus_type, NULL,
309 if (d && d->of_node) {
310 for_each_child_of_node(d->of_node, port)
311 armada_add_endpoints(dev, &match, port);
317 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
321 static int armada_drm_remove(struct platform_device *pdev)
323 component_master_del(&pdev->dev, &armada_master_ops);
327 static const struct platform_device_id armada_drm_platform_ids[] = {
329 .name = "armada-drm",
331 .name = "armada-510-drm",
335 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
337 static struct platform_driver armada_drm_platform_driver = {
338 .probe = armada_drm_probe,
339 .remove = armada_drm_remove,
341 .name = "armada-drm",
343 .id_table = armada_drm_platform_ids,
346 static int __init armada_drm_init(void)
350 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
352 ret = platform_driver_register(&armada_lcd_platform_driver);
355 ret = platform_driver_register(&armada_drm_platform_driver);
357 platform_driver_unregister(&armada_lcd_platform_driver);
360 module_init(armada_drm_init);
362 static void __exit armada_drm_exit(void)
364 platform_driver_unregister(&armada_drm_platform_driver);
365 platform_driver_unregister(&armada_lcd_platform_driver);
367 module_exit(armada_drm_exit);
369 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
370 MODULE_DESCRIPTION("Armada DRM Driver");
371 MODULE_LICENSE("GPL");
372 MODULE_ALIAS("platform:armada-drm");