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/clients/drm_client_setup.h>
15#include <drm/drm_atomic_helper.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 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
49 .ioctls = armada_ioctls,
50 .num_ioctls = ARRAY_SIZE(armada_ioctls),
51 .fops = &armada_drm_fops,
52};
53
54static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
55 .fb_create = armada_fb_create,
56 .atomic_check = drm_atomic_helper_check,
57 .atomic_commit = drm_atomic_helper_commit,
58};
59
60static int armada_drm_bind(struct device *dev)
61{
62 struct armada_private *priv;
63 struct resource *mem = NULL;
64 int ret, n;
65
66 for (n = 0; ; n++) {
67 struct resource *r = platform_get_resource(to_platform_device(dev),
68 IORESOURCE_MEM, n);
69 if (!r)
70 break;
71
72 /* Resources above 64K are graphics memory */
73 if (resource_size(res: r) > SZ_64K)
74 mem = r;
75 else
76 return -EINVAL;
77 }
78
79 if (!mem)
80 return -ENXIO;
81
82 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
83 "armada-drm"))
84 return -EBUSY;
85
86 priv = devm_drm_dev_alloc(dev, &armada_drm_driver,
87 struct armada_private, drm);
88 if (IS_ERR(ptr: priv)) {
89 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
90 __func__, PTR_ERR(priv));
91 return PTR_ERR(ptr: priv);
92 }
93
94 /* Remove early framebuffers */
95 ret = aperture_remove_all_conflicting_devices(name: armada_drm_driver.name);
96 if (ret) {
97 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
98 __func__, ret);
99 return ret;
100 }
101
102 dev_set_drvdata(dev, data: &priv->drm);
103
104 /* Mode setting support */
105 drm_mode_config_init(dev: &priv->drm);
106 priv->drm.mode_config.min_width = 320;
107 priv->drm.mode_config.min_height = 200;
108
109 /*
110 * With vscale enabled, the maximum width is 1920 due to the
111 * 1920 by 3 lines RAM
112 */
113 priv->drm.mode_config.max_width = 1920;
114 priv->drm.mode_config.max_height = 2048;
115
116 priv->drm.mode_config.preferred_depth = 24;
117 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
118 drm_mm_init(mm: &priv->linear, start: mem->start, size: resource_size(res: mem));
119 mutex_init(&priv->linear_lock);
120
121 ret = component_bind_all(parent: dev, data: &priv->drm);
122 if (ret)
123 goto err_kms;
124
125 ret = drm_vblank_init(dev: &priv->drm, num_crtcs: priv->drm.mode_config.num_crtc);
126 if (ret)
127 goto err_comp;
128
129 drm_mode_config_reset(dev: &priv->drm);
130
131 drm_kms_helper_poll_init(dev: &priv->drm);
132
133 ret = drm_dev_register(dev: &priv->drm, flags: 0);
134 if (ret)
135 goto err_poll;
136
137#ifdef CONFIG_DEBUG_FS
138 armada_drm_debugfs_init(priv->drm.primary);
139#endif
140
141 drm_client_setup(dev: &priv->drm, NULL);
142
143 return 0;
144
145 err_poll:
146 drm_kms_helper_poll_fini(dev: &priv->drm);
147 err_comp:
148 component_unbind_all(parent: dev, data: &priv->drm);
149 err_kms:
150 drm_mode_config_cleanup(dev: &priv->drm);
151 drm_mm_takedown(mm: &priv->linear);
152 dev_set_drvdata(dev, NULL);
153 return ret;
154}
155
156static void armada_drm_unbind(struct device *dev)
157{
158 struct drm_device *drm = dev_get_drvdata(dev);
159 struct armada_private *priv = drm_to_armada_dev(drm);
160
161 drm_kms_helper_poll_fini(dev: &priv->drm);
162
163 drm_dev_unregister(dev: &priv->drm);
164
165 drm_atomic_helper_shutdown(dev: &priv->drm);
166
167 component_unbind_all(parent: dev, data: &priv->drm);
168
169 drm_mode_config_cleanup(dev: &priv->drm);
170 drm_mm_takedown(mm: &priv->linear);
171 dev_set_drvdata(dev, NULL);
172}
173
174static void armada_add_endpoints(struct device *dev,
175 struct component_match **match, struct device_node *dev_node)
176{
177 struct device_node *ep, *remote;
178
179 for_each_endpoint_of_node(dev_node, ep) {
180 remote = of_graph_get_remote_port_parent(node: ep);
181 if (remote && of_device_is_available(device: remote))
182 drm_of_component_match_add(master: dev, matchptr: match, compare: component_compare_of,
183 node: remote);
184 of_node_put(node: remote);
185 }
186}
187
188static const struct component_master_ops armada_master_ops = {
189 .bind = armada_drm_bind,
190 .unbind = armada_drm_unbind,
191};
192
193static int armada_drm_probe(struct platform_device *pdev)
194{
195 struct component_match *match = NULL;
196 struct device *dev = &pdev->dev;
197 int ret;
198
199 ret = drm_of_component_probe(dev, compare_of: component_compare_dev_name, m_ops: &armada_master_ops);
200 if (ret != -EINVAL)
201 return ret;
202
203 if (dev->platform_data) {
204 char **devices = dev->platform_data;
205 struct device *d;
206 int i;
207
208 for (i = 0; devices[i]; i++)
209 component_match_add(parent: dev, matchptr: &match, compare: component_compare_dev_name,
210 compare_data: devices[i]);
211
212 if (i == 0) {
213 dev_err(dev, "missing 'ports' property\n");
214 return -ENODEV;
215 }
216
217 for (i = 0; devices[i]; i++) {
218 d = bus_find_device_by_name(bus: &platform_bus_type, NULL,
219 name: devices[i]);
220 if (d && d->of_node)
221 armada_add_endpoints(dev, match: &match, dev_node: d->of_node);
222 put_device(dev: d);
223 }
224 }
225
226 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
227 match);
228}
229
230static void armada_drm_remove(struct platform_device *pdev)
231{
232 component_master_del(&pdev->dev, &armada_master_ops);
233}
234
235static void armada_drm_shutdown(struct platform_device *pdev)
236{
237 drm_atomic_helper_shutdown(dev: platform_get_drvdata(pdev));
238}
239
240static const struct platform_device_id armada_drm_platform_ids[] = {
241 {
242 .name = "armada-drm",
243 }, {
244 .name = "armada-510-drm",
245 },
246 { },
247};
248MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
249
250static struct platform_driver armada_drm_platform_driver = {
251 .probe = armada_drm_probe,
252 .remove = armada_drm_remove,
253 .shutdown = armada_drm_shutdown,
254 .driver = {
255 .name = "armada-drm",
256 },
257 .id_table = armada_drm_platform_ids,
258};
259
260static int __init armada_drm_init(void)
261{
262 int ret;
263
264 if (drm_firmware_drivers_only())
265 return -ENODEV;
266
267 ret = platform_driver_register(&armada_lcd_platform_driver);
268 if (ret)
269 return ret;
270 ret = platform_driver_register(&armada_drm_platform_driver);
271 if (ret)
272 platform_driver_unregister(&armada_lcd_platform_driver);
273 return ret;
274}
275module_init(armada_drm_init);
276
277static void __exit armada_drm_exit(void)
278{
279 platform_driver_unregister(&armada_drm_platform_driver);
280 platform_driver_unregister(&armada_lcd_platform_driver);
281}
282module_exit(armada_drm_exit);
283
284MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
285MODULE_DESCRIPTION("Armada DRM Driver");
286MODULE_LICENSE("GPL");
287MODULE_ALIAS("platform:armada-drm");
288

source code of linux/drivers/gpu/drm/armada/armada_drv.c