1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Russell King
6 #include <linux/component.h>
7 #include <linux/module.h>
8 #include <linux/of_graph.h>
9 #include <drm/drm_atomic_helper.h>
10 #include <drm/drm_probe_helper.h>
11 #include <drm/drm_fb_helper.h>
12 #include <drm/drm_of.h>
13 #include "armada_crtc.h"
14 #include "armada_drm.h"
15 #include "armada_gem.h"
16 #include "armada_fb.h"
17 #include "armada_hw.h"
18 #include <drm/armada_drm.h>
19 #include "armada_ioctlP.h"
21 static struct drm_ioctl_desc armada_ioctls[] = {
22 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
23 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
24 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
27 DEFINE_DRM_GEM_FOPS(armada_drm_fops);
29 static struct drm_driver armada_drm_driver = {
30 .lastclose = drm_fb_helper_lastclose,
31 .gem_free_object_unlocked = armada_gem_free_object,
32 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
33 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
34 .gem_prime_export = armada_gem_prime_export,
35 .gem_prime_import = armada_gem_prime_import,
36 .dumb_create = armada_gem_dumb_create,
37 .gem_vm_ops = &armada_gem_vm_ops,
41 .desc = "Armada SoC DRM",
43 .driver_features = DRIVER_GEM | DRIVER_MODESET |
44 DRIVER_PRIME | DRIVER_ATOMIC,
45 .ioctls = armada_ioctls,
46 .fops = &armada_drm_fops,
49 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
50 .fb_create = armada_fb_create,
51 .output_poll_changed = drm_fb_helper_output_poll_changed,
52 .atomic_check = drm_atomic_helper_check,
53 .atomic_commit = drm_atomic_helper_commit,
56 static int armada_drm_bind(struct device *dev)
58 struct armada_private *priv;
59 struct resource *mem = NULL;
63 struct resource *r = platform_get_resource(to_platform_device(dev),
68 /* Resources above 64K are graphics memory */
69 if (resource_size(r) > SZ_64K)
78 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
82 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
87 * The drm_device structure must be at the start of
88 * armada_private for drm_dev_put() to work correctly.
90 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
92 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
94 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
100 /* Remove early framebuffers */
101 ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
105 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
111 priv->drm.dev_private = priv;
113 dev_set_drvdata(dev, &priv->drm);
115 /* Mode setting support */
116 drm_mode_config_init(&priv->drm);
117 priv->drm.mode_config.min_width = 320;
118 priv->drm.mode_config.min_height = 200;
121 * With vscale enabled, the maximum width is 1920 due to the
122 * 1920 by 3 lines RAM
124 priv->drm.mode_config.max_width = 1920;
125 priv->drm.mode_config.max_height = 2048;
127 priv->drm.mode_config.preferred_depth = 24;
128 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
129 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
130 mutex_init(&priv->linear_lock);
132 ret = component_bind_all(dev, &priv->drm);
136 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
140 priv->drm.irq_enabled = true;
142 drm_mode_config_reset(&priv->drm);
144 ret = armada_fbdev_init(&priv->drm);
148 drm_kms_helper_poll_init(&priv->drm);
150 ret = drm_dev_register(&priv->drm, 0);
154 #ifdef CONFIG_DEBUG_FS
155 armada_drm_debugfs_init(priv->drm.primary);
161 drm_kms_helper_poll_fini(&priv->drm);
162 armada_fbdev_fini(&priv->drm);
164 component_unbind_all(dev, &priv->drm);
166 drm_mode_config_cleanup(&priv->drm);
167 drm_mm_takedown(&priv->linear);
168 drm_dev_put(&priv->drm);
172 static void armada_drm_unbind(struct device *dev)
174 struct drm_device *drm = dev_get_drvdata(dev);
175 struct armada_private *priv = drm->dev_private;
177 drm_kms_helper_poll_fini(&priv->drm);
178 armada_fbdev_fini(&priv->drm);
180 drm_dev_unregister(&priv->drm);
182 drm_atomic_helper_shutdown(&priv->drm);
184 component_unbind_all(dev, &priv->drm);
186 drm_mode_config_cleanup(&priv->drm);
187 drm_mm_takedown(&priv->linear);
189 drm_dev_put(&priv->drm);
192 static int compare_of(struct device *dev, void *data)
194 return dev->of_node == data;
197 static int compare_dev_name(struct device *dev, void *data)
199 const char *name = data;
200 return !strcmp(dev_name(dev), name);
203 static void armada_add_endpoints(struct device *dev,
204 struct component_match **match, struct device_node *dev_node)
206 struct device_node *ep, *remote;
208 for_each_endpoint_of_node(dev_node, ep) {
209 remote = of_graph_get_remote_port_parent(ep);
210 if (remote && of_device_is_available(remote))
211 drm_of_component_match_add(dev, match, compare_of,
217 static const struct component_master_ops armada_master_ops = {
218 .bind = armada_drm_bind,
219 .unbind = armada_drm_unbind,
222 static int armada_drm_probe(struct platform_device *pdev)
224 struct component_match *match = NULL;
225 struct device *dev = &pdev->dev;
228 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
232 if (dev->platform_data) {
233 char **devices = dev->platform_data;
237 for (i = 0; devices[i]; i++)
238 component_match_add(dev, &match, compare_dev_name,
242 dev_err(dev, "missing 'ports' property\n");
246 for (i = 0; devices[i]; i++) {
247 d = bus_find_device_by_name(&platform_bus_type, NULL,
250 armada_add_endpoints(dev, &match, d->of_node);
255 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
259 static int armada_drm_remove(struct platform_device *pdev)
261 component_master_del(&pdev->dev, &armada_master_ops);
265 static const struct platform_device_id armada_drm_platform_ids[] = {
267 .name = "armada-drm",
269 .name = "armada-510-drm",
273 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
275 static struct platform_driver armada_drm_platform_driver = {
276 .probe = armada_drm_probe,
277 .remove = armada_drm_remove,
279 .name = "armada-drm",
281 .id_table = armada_drm_platform_ids,
284 static int __init armada_drm_init(void)
288 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
290 ret = platform_driver_register(&armada_lcd_platform_driver);
293 ret = platform_driver_register(&armada_drm_platform_driver);
295 platform_driver_unregister(&armada_lcd_platform_driver);
298 module_init(armada_drm_init);
300 static void __exit armada_drm_exit(void)
302 platform_driver_unregister(&armada_drm_platform_driver);
303 platform_driver_unregister(&armada_lcd_platform_driver);
305 module_exit(armada_drm_exit);
307 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
308 MODULE_DESCRIPTION("Armada DRM Driver");
309 MODULE_LICENSE("GPL");
310 MODULE_ALIAS("platform:armada-drm");