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 drm_ioctl_desc exynos_ioctls[] = {
 79	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 80			DRM_RENDER_ALLOW),
 81	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 82			DRM_RENDER_ALLOW),
 83	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 84			DRM_RENDER_ALLOW),
 85	DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 86			DRM_AUTH),
 87	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 88			DRM_RENDER_ALLOW),
 89	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 90			DRM_RENDER_ALLOW),
 91	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 92			DRM_RENDER_ALLOW),
 93	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
 94			exynos_drm_ipp_get_res_ioctl,
 95			DRM_RENDER_ALLOW),
 96	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 97			DRM_RENDER_ALLOW),
 98	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 99			exynos_drm_ipp_get_limits_ioctl,
100			DRM_RENDER_ALLOW),
101	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
102			DRM_RENDER_ALLOW),
103};
104
105DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops);
106
107static const struct drm_driver exynos_drm_driver = {
108	.driver_features	= DRIVER_MODESET | DRIVER_GEM
109				  | DRIVER_ATOMIC | DRIVER_RENDER,
110	.open			= exynos_drm_open,
111	.lastclose		= drm_fb_helper_lastclose,
112	.postclose		= exynos_drm_postclose,
113	.dumb_create		= exynos_drm_gem_dumb_create,
114	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
115	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
116	.gem_prime_import	= exynos_drm_gem_prime_import,
117	.gem_prime_import_sg_table	= exynos_drm_gem_prime_import_sg_table,
118	.gem_prime_mmap		= drm_gem_prime_mmap,
119	.ioctls			= exynos_ioctls,
120	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
121	.fops			= &exynos_drm_driver_fops,
122	.name	= DRIVER_NAME,
123	.desc	= DRIVER_DESC,
124	.date	= DRIVER_DATE,
125	.major	= DRIVER_MAJOR,
126	.minor	= DRIVER_MINOR,
127};
128
129static int exynos_drm_suspend(struct device *dev)
130{
131	struct drm_device *drm_dev = dev_get_drvdata(dev);
132
133	return  drm_mode_config_helper_suspend(drm_dev);
134}
135
136static void exynos_drm_resume(struct device *dev)
137{
138	struct drm_device *drm_dev = dev_get_drvdata(dev);
139
140	drm_mode_config_helper_resume(drm_dev);
141}
142
143static const struct dev_pm_ops exynos_drm_pm_ops = {
144	.prepare = exynos_drm_suspend,
145	.complete = exynos_drm_resume,
146};
147
148/* forward declaration */
149static struct platform_driver exynos_drm_platform_driver;
150
151struct exynos_drm_driver_info {
152	struct platform_driver *driver;
153	unsigned int flags;
154};
155
156#define DRM_COMPONENT_DRIVER	BIT(0)	/* supports component framework */
157#define DRM_VIRTUAL_DEVICE	BIT(1)	/* create virtual platform device */
158#define DRM_FIMC_DEVICE		BIT(2)	/* devices shared with V4L2 subsystem */
159
160#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
161
162/*
163 * Connector drivers should not be placed before associated crtc drivers,
164 * because connector requires pipe number of its crtc during initialization.
165 */
166static struct exynos_drm_driver_info exynos_drm_drivers[] = {
167	{
168		DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
169		DRM_COMPONENT_DRIVER
170	}, {
171		DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
172		DRM_COMPONENT_DRIVER
173	}, {
174		DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
175		DRM_COMPONENT_DRIVER
176	}, {
177		DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
178		DRM_COMPONENT_DRIVER
179	}, {
180		DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
181		DRM_COMPONENT_DRIVER
182	}, {
183		DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
184		DRM_COMPONENT_DRIVER
185	}, {
186		DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
187		DRM_COMPONENT_DRIVER
188	}, {
189		DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
190		DRM_COMPONENT_DRIVER
191	}, {
192		DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
193		DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
194	}, {
195		DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
196		DRM_COMPONENT_DRIVER
197	}, {
198		DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
199		DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
200	}, {
201		DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
202		DRM_COMPONENT_DRIVER
203	}, {
204		DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
205		DRM_COMPONENT_DRIVER
206	}, {
207		DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
208		DRM_COMPONENT_DRIVER
209	}, {
210		&exynos_drm_platform_driver,
211		DRM_VIRTUAL_DEVICE
212	}
213};
214
215static struct component_match *exynos_drm_match_add(struct device *dev)
216{
217	struct component_match *match = NULL;
218	int i;
219
220	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
221		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
222		struct device *p = NULL, *d;
223
224		if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
225			continue;
226
227		while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
228			put_device(p);
229
230			if (!(info->flags & DRM_FIMC_DEVICE) ||
231			    exynos_drm_check_fimc_device(d) == 0)
232				component_match_add(dev, &match, component_compare_dev, d);
233			p = d;
234		}
235		put_device(p);
236	}
237
238	return match ?: ERR_PTR(-ENODEV);
239}
240
241static int exynos_drm_bind(struct device *dev)
242{
243	struct exynos_drm_private *private;
244	struct drm_encoder *encoder;
245	struct drm_device *drm;
246	unsigned int clone_mask;
247	int ret;
248
249	drm = drm_dev_alloc(&exynos_drm_driver, dev);
250	if (IS_ERR(drm))
251		return PTR_ERR(drm);
252
253	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
254	if (!private) {
255		ret = -ENOMEM;
256		goto err_free_drm;
257	}
258
259	init_waitqueue_head(&private->wait);
260	spin_lock_init(&private->lock);
261
262	dev_set_drvdata(dev, drm);
263	drm->dev_private = (void *)private;
264
265	drm_mode_config_init(drm);
266
267	exynos_drm_mode_config_init(drm);
268
269	/* setup possible_clones. */
270	clone_mask = 0;
271	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
272		clone_mask |= drm_encoder_mask(encoder);
273
274	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
275		encoder->possible_clones = clone_mask;
276
277	/* Try to bind all sub drivers. */
278	ret = component_bind_all(drm->dev, drm);
279	if (ret)
280		goto err_mode_config_cleanup;
281
282	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
283	if (ret)
284		goto err_unbind_all;
285
286	drm_mode_config_reset(drm);
287
288	/* init kms poll for handling hpd */
289	drm_kms_helper_poll_init(drm);
290
291	ret = exynos_drm_fbdev_init(drm);
292	if (ret)
293		goto err_cleanup_poll;
294
295	/* register the DRM device */
296	ret = drm_dev_register(drm, 0);
297	if (ret < 0)
298		goto err_cleanup_fbdev;
299
300	return 0;
301
302err_cleanup_fbdev:
303	exynos_drm_fbdev_fini(drm);
304err_cleanup_poll:
305	drm_kms_helper_poll_fini(drm);
306err_unbind_all:
307	component_unbind_all(drm->dev, drm);
308err_mode_config_cleanup:
309	drm_mode_config_cleanup(drm);
310	exynos_drm_cleanup_dma(drm);
311	kfree(private);
312err_free_drm:
313	drm_dev_put(drm);
314
315	return ret;
316}
317
318static void exynos_drm_unbind(struct device *dev)
319{
320	struct drm_device *drm = dev_get_drvdata(dev);
321
322	drm_dev_unregister(drm);
323
324	exynos_drm_fbdev_fini(drm);
325	drm_kms_helper_poll_fini(drm);
326
327	component_unbind_all(drm->dev, drm);
328	drm_mode_config_cleanup(drm);
329	exynos_drm_cleanup_dma(drm);
330
331	kfree(drm->dev_private);
332	drm->dev_private = NULL;
333	dev_set_drvdata(dev, NULL);
334
335	drm_dev_put(drm);
336}
337
338static const struct component_master_ops exynos_drm_ops = {
339	.bind		= exynos_drm_bind,
340	.unbind		= exynos_drm_unbind,
341};
342
343static int exynos_drm_platform_probe(struct platform_device *pdev)
344{
345	struct component_match *match;
346
347	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
348
349	match = exynos_drm_match_add(&pdev->dev);
350	if (IS_ERR(match))
351		return PTR_ERR(match);
352
353	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
354					       match);
355}
356
357static int exynos_drm_platform_remove(struct platform_device *pdev)
358{
359	component_master_del(&pdev->dev, &exynos_drm_ops);
360	return 0;
361}
362
363static struct platform_driver exynos_drm_platform_driver = {
364	.probe	= exynos_drm_platform_probe,
365	.remove	= exynos_drm_platform_remove,
366	.driver	= {
367		.name	= "exynos-drm",
368		.pm	= &exynos_drm_pm_ops,
369	},
370};
371
372static void exynos_drm_unregister_devices(void)
373{
374	int i;
375
376	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
377		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
378		struct device *dev;
379
380		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
381			continue;
382
383		while ((dev = platform_find_device_by_driver(NULL,
384						&info->driver->driver))) {
385			put_device(dev);
386			platform_device_unregister(to_platform_device(dev));
387		}
388	}
389}
390
391static int exynos_drm_register_devices(void)
392{
393	struct platform_device *pdev;
394	int i;
395
396	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
397		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
398
399		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
400			continue;
401
402		pdev = platform_device_register_simple(
403					info->driver->driver.name, -1, NULL, 0);
404		if (IS_ERR(pdev))
405			goto fail;
406	}
407
408	return 0;
409fail:
410	exynos_drm_unregister_devices();
411	return PTR_ERR(pdev);
412}
413
414static void exynos_drm_unregister_drivers(void)
415{
416	int i;
417
418	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
419		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
420
421		if (!info->driver)
422			continue;
423
424		platform_driver_unregister(info->driver);
425	}
426}
427
428static int exynos_drm_register_drivers(void)
429{
430	int i, ret;
431
432	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
433		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
434
435		if (!info->driver)
436			continue;
437
438		ret = platform_driver_register(info->driver);
439		if (ret)
440			goto fail;
441	}
442	return 0;
443fail:
444	exynos_drm_unregister_drivers();
445	return ret;
446}
447
448static int exynos_drm_init(void)
449{
450	int ret;
451
452	if (drm_firmware_drivers_only())
453		return -ENODEV;
454
455	ret = exynos_drm_register_devices();
456	if (ret)
457		return ret;
458
459	ret = exynos_drm_register_drivers();
460	if (ret)
461		goto err_unregister_pdevs;
462
463	return 0;
464
465err_unregister_pdevs:
466	exynos_drm_unregister_devices();
467
468	return ret;
469}
470
471static void exynos_drm_exit(void)
472{
473	exynos_drm_unregister_drivers();
474	exynos_drm_unregister_devices();
475}
476
477module_init(exynos_drm_init);
478module_exit(exynos_drm_exit);
479
480MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
481MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
482MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
483MODULE_DESCRIPTION("Samsung SoC DRM Driver");
484MODULE_LICENSE("GPL");