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	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(&priv->drm);
161
162	drm_dev_unregister(&priv->drm);
163
164	drm_atomic_helper_shutdown(&priv->drm);
165
166	component_unbind_all(dev, &priv->drm);
167
168	drm_mode_config_cleanup(&priv->drm);
169	drm_mm_takedown(&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(ep);
180		if (remote && of_device_is_available(remote))
181			drm_of_component_match_add(dev, match, component_compare_of,
182						   remote);
183		of_node_put(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, component_compare_dev_name, &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(dev, &match, component_compare_dev_name,
209					    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(&platform_bus_type, NULL,
218						    devices[i]);
219			if (d && d->of_node)
220				armada_add_endpoints(dev, &match, d->of_node);
221			put_device(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(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");