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