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