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