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(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(priv)) {
88		dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
89			__func__, PTR_ERR(priv));
90		return PTR_ERR(priv);
91	}
92
93	/* Remove early framebuffers */
94	ret = drm_aperture_remove_framebuffers(&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, &priv->drm);
102
103	/* Mode setting support */
104	drm_mode_config_init(&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(&priv->linear, mem->start, resource_size(mem));
118	mutex_init(&priv->linear_lock);
119
120	ret = component_bind_all(dev, &priv->drm);
121	if (ret)
122		goto err_kms;
123
124	ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
125	if (ret)
126		goto err_comp;
127
128	drm_mode_config_reset(&priv->drm);
129
130	drm_kms_helper_poll_init(&priv->drm);
131
132	ret = drm_dev_register(&priv->drm, 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(&priv->drm);
141
142	return 0;
143
144 err_poll:
145	drm_kms_helper_poll_fini(&priv->drm);
146 err_comp:
147	component_unbind_all(dev, &priv->drm);
148 err_kms:
149	drm_mode_config_cleanup(&priv->drm);
150	drm_mm_takedown(&priv->linear);
151	return ret;
152}
153
154static void armada_drm_unbind(struct device *dev)
155{
156	struct drm_device *drm = dev_get_drvdata(dev);
157	struct armada_private *priv = drm_to_armada_dev(drm);
158
159	drm_kms_helper_poll_fini(&priv->drm);
160
161	drm_dev_unregister(&priv->drm);
162
163	drm_atomic_helper_shutdown(&priv->drm);
164
165	component_unbind_all(dev, &priv->drm);
166
167	drm_mode_config_cleanup(&priv->drm);
168	drm_mm_takedown(&priv->linear);
169}
170
171static void armada_add_endpoints(struct device *dev,
172	struct component_match **match, struct device_node *dev_node)
173{
174	struct device_node *ep, *remote;
175
176	for_each_endpoint_of_node(dev_node, ep) {
177		remote = of_graph_get_remote_port_parent(ep);
178		if (remote && of_device_is_available(remote))
179			drm_of_component_match_add(dev, match, component_compare_of,
180						   remote);
181		of_node_put(remote);
182	}
183}
184
185static const struct component_master_ops armada_master_ops = {
186	.bind = armada_drm_bind,
187	.unbind = armada_drm_unbind,
188};
189
190static int armada_drm_probe(struct platform_device *pdev)
191{
192	struct component_match *match = NULL;
193	struct device *dev = &pdev->dev;
194	int ret;
195
196	ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops);
197	if (ret != -EINVAL)
198		return ret;
199
200	if (dev->platform_data) {
201		char **devices = dev->platform_data;
202		struct device *d;
203		int i;
204
205		for (i = 0; devices[i]; i++)
206			component_match_add(dev, &match, component_compare_dev_name,
207					    devices[i]);
208
209		if (i == 0) {
210			dev_err(dev, "missing 'ports' property\n");
211			return -ENODEV;
212		}
213
214		for (i = 0; devices[i]; i++) {
215			d = bus_find_device_by_name(&platform_bus_type, NULL,
216						    devices[i]);
217			if (d && d->of_node)
218				armada_add_endpoints(dev, &match, d->of_node);
219			put_device(d);
220		}
221	}
222
223	return component_master_add_with_match(&pdev->dev, &armada_master_ops,
224					       match);
225}
226
227static int armada_drm_remove(struct platform_device *pdev)
228{
229	component_master_del(&pdev->dev, &armada_master_ops);
230	return 0;
231}
232
233static const struct platform_device_id armada_drm_platform_ids[] = {
234	{
235		.name		= "armada-drm",
236	}, {
237		.name		= "armada-510-drm",
238	},
239	{ },
240};
241MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
242
243static struct platform_driver armada_drm_platform_driver = {
244	.probe	= armada_drm_probe,
245	.remove	= armada_drm_remove,
246	.driver	= {
247		.name	= "armada-drm",
248	},
249	.id_table = armada_drm_platform_ids,
250};
251
252static int __init armada_drm_init(void)
253{
254	int ret;
255
256	if (drm_firmware_drivers_only())
257		return -ENODEV;
258
259	ret = platform_driver_register(&armada_lcd_platform_driver);
260	if (ret)
261		return ret;
262	ret = platform_driver_register(&armada_drm_platform_driver);
263	if (ret)
264		platform_driver_unregister(&armada_lcd_platform_driver);
265	return ret;
266}
267module_init(armada_drm_init);
268
269static void __exit armada_drm_exit(void)
270{
271	platform_driver_unregister(&armada_drm_platform_driver);
272	platform_driver_unregister(&armada_lcd_platform_driver);
273}
274module_exit(armada_drm_exit);
275
276MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
277MODULE_DESCRIPTION("Armada DRM Driver");
278MODULE_LICENSE("GPL");
279MODULE_ALIAS("platform:armada-drm");
280