1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * Authors:
5 *	Inki Dae <inki.dae@samsung.com>
6 *	Joonyoung Shim <jy0922.shim@samsung.com>
7 *	Seung-Woo Kim <sw0312.kim@samsung.com>
8 */
9
10#include <linux/component.h>
11#include <linux/dma-mapping.h>
12#include <linux/platform_device.h>
13#include <linux/pm_runtime.h>
14#include <linux/uaccess.h>
15
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_drv.h>
19#include <drm/drm_fb_helper.h>
20#include <drm/drm_file.h>
21#include <drm/drm_fourcc.h>
22#include <drm/drm_ioctl.h>
23#include <drm/drm_probe_helper.h>
24#include <drm/drm_vblank.h>
25#include <drm/exynos_drm.h>
26
27#include "exynos_drm_drv.h"
28#include "exynos_drm_fb.h"
29#include "exynos_drm_fbdev.h"
30#include "exynos_drm_g2d.h"
31#include "exynos_drm_gem.h"
32#include "exynos_drm_ipp.h"
33#include "exynos_drm_plane.h"
34#include "exynos_drm_vidi.h"
35
36#define DRIVER_NAME	"exynos"
37#define DRIVER_DESC	"Samsung SoC DRM"
38#define DRIVER_DATE	"20180330"
39
40/*
41 * Interface history:
42 *
43 * 1.0 - Original version
44 * 1.1 - Upgrade IPP driver to version 2.0
45 */
46#define DRIVER_MAJOR	1
47#define DRIVER_MINOR	1
48
49static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
50{
51	struct drm_exynos_file_private *file_priv;
52	int ret;
53
54	file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
55	if (!file_priv)
56		return -ENOMEM;
57
58	file->driver_priv = file_priv;
59	ret = g2d_open(dev, file);
60	if (ret)
61		goto err_file_priv_free;
62
63	return ret;
64
65err_file_priv_free:
66	kfree(file_priv);
67	file->driver_priv = NULL;
68	return ret;
69}
70
71static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
72{
73	g2d_close(dev, file);
74	kfree(file->driver_priv);
75	file->driver_priv = NULL;
76}
77
78static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
79	.open = drm_gem_vm_open,
80	.close = drm_gem_vm_close,
81};
82
83static const struct drm_ioctl_desc exynos_ioctls[] = {
84	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
85			DRM_RENDER_ALLOW),
86	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
87			DRM_RENDER_ALLOW),
88	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
89			DRM_RENDER_ALLOW),
90	DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
91			DRM_AUTH),
92	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
93			DRM_RENDER_ALLOW),
94	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
95			DRM_RENDER_ALLOW),
96	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
97			DRM_RENDER_ALLOW),
98	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
99			exynos_drm_ipp_get_res_ioctl,
100			DRM_RENDER_ALLOW),
101	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
102			DRM_RENDER_ALLOW),
103	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
104			exynos_drm_ipp_get_limits_ioctl,
105			DRM_RENDER_ALLOW),
106	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
107			DRM_RENDER_ALLOW),
108};
109
110static const struct file_operations exynos_drm_driver_fops = {
111	.owner		= THIS_MODULE,
112	.open		= drm_open,
113	.mmap		= exynos_drm_gem_mmap,
114	.poll		= drm_poll,
115	.read		= drm_read,
116	.unlocked_ioctl	= drm_ioctl,
117	.compat_ioctl = drm_compat_ioctl,
118	.release	= drm_release,
119};
120
121static struct drm_driver exynos_drm_driver = {
122	.driver_features	= DRIVER_MODESET | DRIVER_GEM
123				  | DRIVER_ATOMIC | DRIVER_RENDER,
124	.open			= exynos_drm_open,
125	.lastclose		= drm_fb_helper_lastclose,
126	.postclose		= exynos_drm_postclose,
127	.gem_free_object_unlocked = exynos_drm_gem_free_object,
128	.gem_vm_ops		= &exynos_drm_gem_vm_ops,
129	.dumb_create		= exynos_drm_gem_dumb_create,
130	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
131	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
132	.gem_prime_import	= exynos_drm_gem_prime_import,
133	.gem_prime_get_sg_table	= exynos_drm_gem_prime_get_sg_table,
134	.gem_prime_import_sg_table	= exynos_drm_gem_prime_import_sg_table,
135	.gem_prime_vmap		= exynos_drm_gem_prime_vmap,
136	.gem_prime_vunmap	= exynos_drm_gem_prime_vunmap,
137	.gem_prime_mmap		= exynos_drm_gem_prime_mmap,
138	.ioctls			= exynos_ioctls,
139	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
140	.fops			= &exynos_drm_driver_fops,
141	.name	= DRIVER_NAME,
142	.desc	= DRIVER_DESC,
143	.date	= DRIVER_DATE,
144	.major	= DRIVER_MAJOR,
145	.minor	= DRIVER_MINOR,
146};
147
148static int exynos_drm_suspend(struct device *dev)
149{
150	struct drm_device *drm_dev = dev_get_drvdata(dev);
151
152	return  drm_mode_config_helper_suspend(drm_dev);
153}
154
155static void exynos_drm_resume(struct device *dev)
156{
157	struct drm_device *drm_dev = dev_get_drvdata(dev);
158
159	drm_mode_config_helper_resume(drm_dev);
160}
161
162static const struct dev_pm_ops exynos_drm_pm_ops = {
163	.prepare = exynos_drm_suspend,
164	.complete = exynos_drm_resume,
165};
166
167/* forward declaration */
168static struct platform_driver exynos_drm_platform_driver;
169
170struct exynos_drm_driver_info {
171	struct platform_driver *driver;
172	unsigned int flags;
173};
174
175#define DRM_COMPONENT_DRIVER	BIT(0)	/* supports component framework */
176#define DRM_VIRTUAL_DEVICE	BIT(1)	/* create virtual platform device */
177#define DRM_FIMC_DEVICE		BIT(2)	/* devices shared with V4L2 subsystem */
178
179#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
180
181/*
182 * Connector drivers should not be placed before associated crtc drivers,
183 * because connector requires pipe number of its crtc during initialization.
184 */
185static struct exynos_drm_driver_info exynos_drm_drivers[] = {
186	{
187		DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
188		DRM_COMPONENT_DRIVER
189	}, {
190		DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
191		DRM_COMPONENT_DRIVER
192	}, {
193		DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
194		DRM_COMPONENT_DRIVER
195	}, {
196		DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
197		DRM_COMPONENT_DRIVER
198	}, {
199		DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
200		DRM_COMPONENT_DRIVER
201	}, {
202		DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
203		DRM_COMPONENT_DRIVER
204	}, {
205		DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
206		DRM_COMPONENT_DRIVER
207	}, {
208		DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
209		DRM_COMPONENT_DRIVER
210	}, {
211		DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
212		DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
213	}, {
214		DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
215		DRM_COMPONENT_DRIVER
216	}, {
217		DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
218		DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
219	}, {
220		DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
221		DRM_COMPONENT_DRIVER
222	}, {
223		DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
224		DRM_COMPONENT_DRIVER
225	}, {
226		DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
227		DRM_COMPONENT_DRIVER
228	}, {
229		&exynos_drm_platform_driver,
230		DRM_VIRTUAL_DEVICE
231	}
232};
233
234static int compare_dev(struct device *dev, void *data)
235{
236	return dev == (struct device *)data;
237}
238
239static struct component_match *exynos_drm_match_add(struct device *dev)
240{
241	struct component_match *match = NULL;
242	int i;
243
244	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
245		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
246		struct device *p = NULL, *d;
247
248		if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
249			continue;
250
251		while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
252			put_device(p);
253
254			if (!(info->flags & DRM_FIMC_DEVICE) ||
255			    exynos_drm_check_fimc_device(d) == 0)
256				component_match_add(dev, &match,
257						    compare_dev, d);
258			p = d;
259		}
260		put_device(p);
261	}
262
263	return match ?: ERR_PTR(-ENODEV);
264}
265
266static int exynos_drm_bind(struct device *dev)
267{
268	struct exynos_drm_private *private;
269	struct drm_encoder *encoder;
270	struct drm_device *drm;
271	unsigned int clone_mask;
272	int ret;
273
274	drm = drm_dev_alloc(&exynos_drm_driver, dev);
275	if (IS_ERR(drm))
276		return PTR_ERR(drm);
277
278	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
279	if (!private) {
280		ret = -ENOMEM;
281		goto err_free_drm;
282	}
283
284	init_waitqueue_head(&private->wait);
285	spin_lock_init(&private->lock);
286
287	dev_set_drvdata(dev, drm);
288	drm->dev_private = (void *)private;
289
290	drm_mode_config_init(drm);
291
292	exynos_drm_mode_config_init(drm);
293
294	/* setup possible_clones. */
295	clone_mask = 0;
296	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
297		clone_mask |= drm_encoder_mask(encoder);
298
299	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
300		encoder->possible_clones = clone_mask;
301
302	/* Try to bind all sub drivers. */
303	ret = component_bind_all(drm->dev, drm);
304	if (ret)
305		goto err_mode_config_cleanup;
306
307	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
308	if (ret)
309		goto err_unbind_all;
310
311	drm_mode_config_reset(drm);
312
313	/*
314	 * enable drm irq mode.
315	 * - with irq_enabled = true, we can use the vblank feature.
316	 *
317	 * P.S. note that we wouldn't use drm irq handler but
318	 *	just specific driver own one instead because
319	 *	drm framework supports only one irq handler.
320	 */
321	drm->irq_enabled = true;
322
323	/* init kms poll for handling hpd */
324	drm_kms_helper_poll_init(drm);
325
326	ret = exynos_drm_fbdev_init(drm);
327	if (ret)
328		goto err_cleanup_poll;
329
330	/* register the DRM device */
331	ret = drm_dev_register(drm, 0);
332	if (ret < 0)
333		goto err_cleanup_fbdev;
334
335	return 0;
336
337err_cleanup_fbdev:
338	exynos_drm_fbdev_fini(drm);
339err_cleanup_poll:
340	drm_kms_helper_poll_fini(drm);
341err_unbind_all:
342	component_unbind_all(drm->dev, drm);
343err_mode_config_cleanup:
344	drm_mode_config_cleanup(drm);
345	exynos_drm_cleanup_dma(drm);
346	kfree(private);
347	dev_set_drvdata(dev, NULL);
348err_free_drm:
349	drm_dev_put(drm);
350
351	return ret;
352}
353
354static void exynos_drm_unbind(struct device *dev)
355{
356	struct drm_device *drm = dev_get_drvdata(dev);
357
358	drm_dev_unregister(drm);
359
360	exynos_drm_fbdev_fini(drm);
361	drm_kms_helper_poll_fini(drm);
362	drm_atomic_helper_shutdown(drm);
363
364	component_unbind_all(drm->dev, drm);
365	drm_mode_config_cleanup(drm);
366	exynos_drm_cleanup_dma(drm);
367
368	kfree(drm->dev_private);
369	drm->dev_private = NULL;
370	dev_set_drvdata(dev, NULL);
371
372	drm_dev_put(drm);
373}
374
375static const struct component_master_ops exynos_drm_ops = {
376	.bind		= exynos_drm_bind,
377	.unbind		= exynos_drm_unbind,
378};
379
380static int exynos_drm_platform_probe(struct platform_device *pdev)
381{
382	struct component_match *match;
383
384	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
385
386	match = exynos_drm_match_add(&pdev->dev);
387	if (IS_ERR(match))
388		return PTR_ERR(match);
389
390	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
391					       match);
392}
393
394static int exynos_drm_platform_remove(struct platform_device *pdev)
395{
396	component_master_del(&pdev->dev, &exynos_drm_ops);
397	return 0;
398}
399
400static void exynos_drm_platform_shutdown(struct platform_device *pdev)
401{
402	struct drm_device *drm = platform_get_drvdata(pdev);
403
404	if (drm)
405		drm_atomic_helper_shutdown(drm);
406}
407
408static struct platform_driver exynos_drm_platform_driver = {
409	.probe	= exynos_drm_platform_probe,
410	.remove	= exynos_drm_platform_remove,
411	.shutdown = exynos_drm_platform_shutdown,
412	.driver	= {
413		.name	= "exynos-drm",
414		.pm	= &exynos_drm_pm_ops,
415	},
416};
417
418static void exynos_drm_unregister_devices(void)
419{
420	int i;
421
422	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
423		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
424		struct device *dev;
425
426		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
427			continue;
428
429		while ((dev = platform_find_device_by_driver(NULL,
430						&info->driver->driver))) {
431			put_device(dev);
432			platform_device_unregister(to_platform_device(dev));
433		}
434	}
435}
436
437static int exynos_drm_register_devices(void)
438{
439	struct platform_device *pdev;
440	int i;
441
442	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
443		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
444
445		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
446			continue;
447
448		pdev = platform_device_register_simple(
449					info->driver->driver.name, -1, NULL, 0);
450		if (IS_ERR(pdev))
451			goto fail;
452	}
453
454	return 0;
455fail:
456	exynos_drm_unregister_devices();
457	return PTR_ERR(pdev);
458}
459
460static void exynos_drm_unregister_drivers(void)
461{
462	int i;
463
464	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
465		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
466
467		if (!info->driver)
468			continue;
469
470		platform_driver_unregister(info->driver);
471	}
472}
473
474static int exynos_drm_register_drivers(void)
475{
476	int i, ret;
477
478	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
479		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
480
481		if (!info->driver)
482			continue;
483
484		ret = platform_driver_register(info->driver);
485		if (ret)
486			goto fail;
487	}
488	return 0;
489fail:
490	exynos_drm_unregister_drivers();
491	return ret;
492}
493
494static int exynos_drm_init(void)
495{
496	int ret;
497
498	ret = exynos_drm_register_devices();
499	if (ret)
500		return ret;
501
502	ret = exynos_drm_register_drivers();
503	if (ret)
504		goto err_unregister_pdevs;
505
506	return 0;
507
508err_unregister_pdevs:
509	exynos_drm_unregister_devices();
510
511	return ret;
512}
513
514static void exynos_drm_exit(void)
515{
516	exynos_drm_unregister_drivers();
517	exynos_drm_unregister_devices();
518}
519
520module_init(exynos_drm_init);
521module_exit(exynos_drm_exit);
522
523MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
524MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
525MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
526MODULE_DESCRIPTION("Samsung SoC DRM Driver");
527MODULE_LICENSE("GPL");
528