1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Russell King
4 */
5
6#include <linux/clk.h>
7#include <linux/component.h>
8#include <linux/module.h>
9#include <linux/of.h>
10#include <linux/of_graph.h>
11#include <linux/platform_device.h>
12
13#include <drm/drm_aperture.h>
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_drv.h>
16#include <drm/drm_ioctl.h>
17#include <drm/drm_managed.h>
18#include <drm/drm_prime.h>
19#include <drm/drm_probe_helper.h>
20#include <drm/drm_of.h>
21#include <drm/drm_vblank.h>
22
23#include "armada_crtc.h"
24#include "armada_drm.h"
25#include "armada_gem.h"
26#include "armada_fb.h"
27#include "armada_hw.h"
28#include <drm/armada_drm.h>
29#include "armada_ioctlP.h"
30
31static const struct drm_ioctl_desc armada_ioctls[] = {
32 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
33 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
34 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
35};
36
37DEFINE_DRM_GEM_FOPS(armada_drm_fops);
38
39static const struct drm_driver armada_drm_driver = {
40 .gem_prime_import = armada_gem_prime_import,
41 .dumb_create = armada_gem_dumb_create,
42 .major = 1,
43 .minor = 0,
44 .name = "armada-drm",
45 .desc = "Armada SoC DRM",
46 .date = "20120730",
47 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
48 .ioctls = armada_ioctls,
49 .num_ioctls = ARRAY_SIZE(armada_ioctls),
50 .fops = &armada_drm_fops,
51};
52
53static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
54 .fb_create = armada_fb_create,
55 .atomic_check = drm_atomic_helper_check,
56 .atomic_commit = drm_atomic_helper_commit,
57};
58
59static int armada_drm_bind(struct device *dev)
60{
61 struct armada_private *priv;
62 struct resource *mem = NULL;
63 int ret, n;
64
65 for (n = 0; ; n++) {
66 struct resource *r = platform_get_resource(to_platform_device(dev),
67 IORESOURCE_MEM, n);
68 if (!r)
69 break;
70
71 /* Resources above 64K are graphics memory */
72 if (resource_size(res: r) > SZ_64K)
73 mem = r;
74 else
75 return -EINVAL;
76 }
77
78 if (!mem)
79 return -ENXIO;
80
81 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
82 "armada-drm"))
83 return -EBUSY;
84
85 priv = devm_drm_dev_alloc(dev, &armada_drm_driver,
86 struct armada_private, drm);
87 if (IS_ERR(ptr: priv)) {
88 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
89 __func__, PTR_ERR(priv));
90 return PTR_ERR(ptr: priv);
91 }
92
93 /* Remove early framebuffers */
94 ret = drm_aperture_remove_framebuffers(req_driver: &armada_drm_driver);
95 if (ret) {
96 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
97 __func__, ret);
98 return ret;
99 }
100
101 dev_set_drvdata(dev, data: &priv->drm);
102
103 /* Mode setting support */
104 drm_mode_config_init(dev: &priv->drm);
105 priv->drm.mode_config.min_width = 320;
106 priv->drm.mode_config.min_height = 200;
107
108 /*
109 * With vscale enabled, the maximum width is 1920 due to the
110 * 1920 by 3 lines RAM
111 */
112 priv->drm.mode_config.max_width = 1920;
113 priv->drm.mode_config.max_height = 2048;
114
115 priv->drm.mode_config.preferred_depth = 24;
116 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
117 drm_mm_init(mm: &priv->linear, start: mem->start, size: resource_size(res: mem));
118 mutex_init(&priv->linear_lock);
119
120 ret = component_bind_all(parent: dev, data: &priv->drm);
121 if (ret)
122 goto err_kms;
123
124 ret = drm_vblank_init(dev: &priv->drm, num_crtcs: priv->drm.mode_config.num_crtc);
125 if (ret)
126 goto err_comp;
127
128 drm_mode_config_reset(dev: &priv->drm);
129
130 drm_kms_helper_poll_init(dev: &priv->drm);
131
132 ret = drm_dev_register(dev: &priv->drm, flags: 0);
133 if (ret)
134 goto err_poll;
135
136#ifdef CONFIG_DEBUG_FS
137 armada_drm_debugfs_init(priv->drm.primary);
138#endif
139
140 armada_fbdev_setup(dev: &priv->drm);
141
142 return 0;
143
144 err_poll:
145 drm_kms_helper_poll_fini(dev: &priv->drm);
146 err_comp:
147 component_unbind_all(parent: dev, data: &priv->drm);
148 err_kms:
149 drm_mode_config_cleanup(dev: &priv->drm);
150 drm_mm_takedown(mm: &priv->linear);
151 dev_set_drvdata(dev, NULL);
152 return ret;
153}
154
155static void armada_drm_unbind(struct device *dev)
156{
157 struct drm_device *drm = dev_get_drvdata(dev);
158 struct armada_private *priv = drm_to_armada_dev(drm);
159
160 drm_kms_helper_poll_fini(dev: &priv->drm);
161
162 drm_dev_unregister(dev: &priv->drm);
163
164 drm_atomic_helper_shutdown(dev: &priv->drm);
165
166 component_unbind_all(parent: dev, data: &priv->drm);
167
168 drm_mode_config_cleanup(dev: &priv->drm);
169 drm_mm_takedown(mm: &priv->linear);
170 dev_set_drvdata(dev, NULL);
171}
172
173static void armada_add_endpoints(struct device *dev,
174 struct component_match **match, struct device_node *dev_node)
175{
176 struct device_node *ep, *remote;
177
178 for_each_endpoint_of_node(dev_node, ep) {
179 remote = of_graph_get_remote_port_parent(node: ep);
180 if (remote && of_device_is_available(device: remote))
181 drm_of_component_match_add(master: dev, matchptr: match, compare: component_compare_of,
182 node: remote);
183 of_node_put(node: remote);
184 }
185}
186
187static const struct component_master_ops armada_master_ops = {
188 .bind = armada_drm_bind,
189 .unbind = armada_drm_unbind,
190};
191
192static int armada_drm_probe(struct platform_device *pdev)
193{
194 struct component_match *match = NULL;
195 struct device *dev = &pdev->dev;
196 int ret;
197
198 ret = drm_of_component_probe(dev, compare_of: component_compare_dev_name, m_ops: &armada_master_ops);
199 if (ret != -EINVAL)
200 return ret;
201
202 if (dev->platform_data) {
203 char **devices = dev->platform_data;
204 struct device *d;
205 int i;
206
207 for (i = 0; devices[i]; i++)
208 component_match_add(parent: dev, matchptr: &match, compare: component_compare_dev_name,
209 compare_data: devices[i]);
210
211 if (i == 0) {
212 dev_err(dev, "missing 'ports' property\n");
213 return -ENODEV;
214 }
215
216 for (i = 0; devices[i]; i++) {
217 d = bus_find_device_by_name(bus: &platform_bus_type, NULL,
218 name: devices[i]);
219 if (d && d->of_node)
220 armada_add_endpoints(dev, match: &match, dev_node: d->of_node);
221 put_device(dev: d);
222 }
223 }
224
225 return component_master_add_with_match(&pdev->dev, &armada_master_ops,
226 match);
227}
228
229static void armada_drm_remove(struct platform_device *pdev)
230{
231 component_master_del(&pdev->dev, &armada_master_ops);
232}
233
234static void armada_drm_shutdown(struct platform_device *pdev)
235{
236 drm_atomic_helper_shutdown(dev: platform_get_drvdata(pdev));
237}
238
239static const struct platform_device_id armada_drm_platform_ids[] = {
240 {
241 .name = "armada-drm",
242 }, {
243 .name = "armada-510-drm",
244 },
245 { },
246};
247MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
248
249static struct platform_driver armada_drm_platform_driver = {
250 .probe = armada_drm_probe,
251 .remove_new = armada_drm_remove,
252 .shutdown = armada_drm_shutdown,
253 .driver = {
254 .name = "armada-drm",
255 },
256 .id_table = armada_drm_platform_ids,
257};
258
259static int __init armada_drm_init(void)
260{
261 int ret;
262
263 if (drm_firmware_drivers_only())
264 return -ENODEV;
265
266 ret = platform_driver_register(&armada_lcd_platform_driver);
267 if (ret)
268 return ret;
269 ret = platform_driver_register(&armada_drm_platform_driver);
270 if (ret)
271 platform_driver_unregister(&armada_lcd_platform_driver);
272 return ret;
273}
274module_init(armada_drm_init);
275
276static void __exit armada_drm_exit(void)
277{
278 platform_driver_unregister(&armada_drm_platform_driver);
279 platform_driver_unregister(&armada_lcd_platform_driver);
280}
281module_exit(armada_drm_exit);
282
283MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
284MODULE_DESCRIPTION("Armada DRM Driver");
285MODULE_LICENSE("GPL");
286MODULE_ALIAS("platform:armada-drm");
287

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