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_graph.h>
10#include <linux/platform_device.h>
11
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_drv.h>
14#include <drm/drm_ioctl.h>
15#include <drm/drm_managed.h>
16#include <drm/drm_prime.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/drm_fb_helper.h>
19#include <drm/drm_of.h>
20#include <drm/drm_vblank.h>
21
22#include "armada_crtc.h"
23#include "armada_drm.h"
24#include "armada_gem.h"
25#include "armada_fb.h"
26#include "armada_hw.h"
27#include <drm/armada_drm.h>
28#include "armada_ioctlP.h"
29
30static struct drm_ioctl_desc armada_ioctls[] = {
31	DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
32	DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
33	DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
34};
35
36DEFINE_DRM_GEM_FOPS(armada_drm_fops);
37
38static struct drm_driver armada_drm_driver = {
39	.lastclose		= drm_fb_helper_lastclose,
40	.gem_free_object_unlocked = armada_gem_free_object,
41	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
42	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
43	.gem_prime_export	= armada_gem_prime_export,
44	.gem_prime_import	= armada_gem_prime_import,
45	.dumb_create		= armada_gem_dumb_create,
46	.gem_vm_ops		= &armada_gem_vm_ops,
47	.major			= 1,
48	.minor			= 0,
49	.name			= "armada-drm",
50	.desc			= "Armada SoC DRM",
51	.date			= "20120730",
52	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
53	.ioctls			= armada_ioctls,
54	.fops			= &armada_drm_fops,
55};
56
57static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
58	.fb_create		= armada_fb_create,
59	.output_poll_changed	= drm_fb_helper_output_poll_changed,
60	.atomic_check		= drm_atomic_helper_check,
61	.atomic_commit		= drm_atomic_helper_commit,
62};
63
64static int armada_drm_bind(struct device *dev)
65{
66	struct armada_private *priv;
67	struct resource *mem = NULL;
68	int ret, n;
69
70	for (n = 0; ; n++) {
71		struct resource *r = platform_get_resource(to_platform_device(dev),
72							   IORESOURCE_MEM, n);
73		if (!r)
74			break;
75
76		/* Resources above 64K are graphics memory */
77		if (resource_size(r) > SZ_64K)
78			mem = r;
79		else
80			return -EINVAL;
81	}
82
83	if (!mem)
84		return -ENXIO;
85
86	if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
87				     "armada-drm"))
88		return -EBUSY;
89
90	priv = devm_drm_dev_alloc(dev, &armada_drm_driver,
91				  struct armada_private, drm);
92	if (IS_ERR(priv)) {
93		dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
94			__func__, PTR_ERR(priv));
95		return PTR_ERR(priv);
96	}
97
98	/* Remove early framebuffers */
99	ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
100							    "armada-drm-fb",
101							    false);
102	if (ret) {
103		dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
104			__func__, ret);
105		return ret;
106	}
107
108	dev_set_drvdata(dev, &priv->drm);
109
110	/* Mode setting support */
111	drm_mode_config_init(&priv->drm);
112	priv->drm.mode_config.min_width = 320;
113	priv->drm.mode_config.min_height = 200;
114
115	/*
116	 * With vscale enabled, the maximum width is 1920 due to the
117	 * 1920 by 3 lines RAM
118	 */
119	priv->drm.mode_config.max_width = 1920;
120	priv->drm.mode_config.max_height = 2048;
121
122	priv->drm.mode_config.preferred_depth = 24;
123	priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
124	drm_mm_init(&priv->linear, mem->start, resource_size(mem));
125	mutex_init(&priv->linear_lock);
126
127	ret = component_bind_all(dev, &priv->drm);
128	if (ret)
129		goto err_kms;
130
131	ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
132	if (ret)
133		goto err_comp;
134
135	priv->drm.irq_enabled = true;
136
137	drm_mode_config_reset(&priv->drm);
138
139	ret = armada_fbdev_init(&priv->drm);
140	if (ret)
141		goto err_comp;
142
143	drm_kms_helper_poll_init(&priv->drm);
144
145	ret = drm_dev_register(&priv->drm, 0);
146	if (ret)
147		goto err_poll;
148
149#ifdef CONFIG_DEBUG_FS
150	armada_drm_debugfs_init(priv->drm.primary);
151#endif
152
153	return 0;
154
155 err_poll:
156	drm_kms_helper_poll_fini(&priv->drm);
157	armada_fbdev_fini(&priv->drm);
158 err_comp:
159	component_unbind_all(dev, &priv->drm);
160 err_kms:
161	drm_mode_config_cleanup(&priv->drm);
162	drm_mm_takedown(&priv->linear);
163	return ret;
164}
165
166static void armada_drm_unbind(struct device *dev)
167{
168	struct drm_device *drm = dev_get_drvdata(dev);
169	struct armada_private *priv = drm_to_armada_dev(drm);
170
171	drm_kms_helper_poll_fini(&priv->drm);
172	armada_fbdev_fini(&priv->drm);
173
174	drm_dev_unregister(&priv->drm);
175
176	drm_atomic_helper_shutdown(&priv->drm);
177
178	component_unbind_all(dev, &priv->drm);
179
180	drm_mode_config_cleanup(&priv->drm);
181	drm_mm_takedown(&priv->linear);
182}
183
184static int compare_of(struct device *dev, void *data)
185{
186	return dev->of_node == data;
187}
188
189static int compare_dev_name(struct device *dev, void *data)
190{
191	const char *name = data;
192	return !strcmp(dev_name(dev), name);
193}
194
195static void armada_add_endpoints(struct device *dev,
196	struct component_match **match, struct device_node *dev_node)
197{
198	struct device_node *ep, *remote;
199
200	for_each_endpoint_of_node(dev_node, ep) {
201		remote = of_graph_get_remote_port_parent(ep);
202		if (remote && of_device_is_available(remote))
203			drm_of_component_match_add(dev, match, compare_of,
204						   remote);
205		of_node_put(remote);
206	}
207}
208
209static const struct component_master_ops armada_master_ops = {
210	.bind = armada_drm_bind,
211	.unbind = armada_drm_unbind,
212};
213
214static int armada_drm_probe(struct platform_device *pdev)
215{
216	struct component_match *match = NULL;
217	struct device *dev = &pdev->dev;
218	int ret;
219
220	ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
221	if (ret != -EINVAL)
222		return ret;
223
224	if (dev->platform_data) {
225		char **devices = dev->platform_data;
226		struct device *d;
227		int i;
228
229		for (i = 0; devices[i]; i++)
230			component_match_add(dev, &match, compare_dev_name,
231					    devices[i]);
232
233		if (i == 0) {
234			dev_err(dev, "missing 'ports' property\n");
235			return -ENODEV;
236		}
237
238		for (i = 0; devices[i]; i++) {
239			d = bus_find_device_by_name(&platform_bus_type, NULL,
240						    devices[i]);
241			if (d && d->of_node)
242				armada_add_endpoints(dev, &match, d->of_node);
243			put_device(d);
244		}
245	}
246
247	return component_master_add_with_match(&pdev->dev, &armada_master_ops,
248					       match);
249}
250
251static int armada_drm_remove(struct platform_device *pdev)
252{
253	component_master_del(&pdev->dev, &armada_master_ops);
254	return 0;
255}
256
257static const struct platform_device_id armada_drm_platform_ids[] = {
258	{
259		.name		= "armada-drm",
260	}, {
261		.name		= "armada-510-drm",
262	},
263	{ },
264};
265MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
266
267static struct platform_driver armada_drm_platform_driver = {
268	.probe	= armada_drm_probe,
269	.remove	= armada_drm_remove,
270	.driver	= {
271		.name	= "armada-drm",
272	},
273	.id_table = armada_drm_platform_ids,
274};
275
276static int __init armada_drm_init(void)
277{
278	int ret;
279
280	armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
281
282	ret = platform_driver_register(&armada_lcd_platform_driver);
283	if (ret)
284		return ret;
285	ret = platform_driver_register(&armada_drm_platform_driver);
286	if (ret)
287		platform_driver_unregister(&armada_lcd_platform_driver);
288	return ret;
289}
290module_init(armada_drm_init);
291
292static void __exit armada_drm_exit(void)
293{
294	platform_driver_unregister(&armada_drm_platform_driver);
295	platform_driver_unregister(&armada_lcd_platform_driver);
296}
297module_exit(armada_drm_exit);
298
299MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
300MODULE_DESCRIPTION("Armada DRM Driver");
301MODULE_LICENSE("GPL");
302MODULE_ALIAS("platform:armada-drm");
303