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 	.gem_prime_import	= exynos_drm_gem_prime_import,
113 	.gem_prime_import_sg_table	= exynos_drm_gem_prime_import_sg_table,
114 	.ioctls			= exynos_ioctls,
115 	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
116 	.fops			= &exynos_drm_driver_fops,
117 	.name	= DRIVER_NAME,
118 	.desc	= DRIVER_DESC,
119 	.date	= DRIVER_DATE,
120 	.major	= DRIVER_MAJOR,
121 	.minor	= DRIVER_MINOR,
122 };
123 
124 static int exynos_drm_suspend(struct device *dev)
125 {
126 	struct drm_device *drm_dev = dev_get_drvdata(dev);
127 
128 	return  drm_mode_config_helper_suspend(drm_dev);
129 }
130 
131 static void exynos_drm_resume(struct device *dev)
132 {
133 	struct drm_device *drm_dev = dev_get_drvdata(dev);
134 
135 	drm_mode_config_helper_resume(drm_dev);
136 }
137 
138 static const struct dev_pm_ops exynos_drm_pm_ops = {
139 	.prepare = exynos_drm_suspend,
140 	.complete = exynos_drm_resume,
141 };
142 
143 /* forward declaration */
144 static struct platform_driver exynos_drm_platform_driver;
145 
146 struct exynos_drm_driver_info {
147 	struct platform_driver *driver;
148 	unsigned int flags;
149 };
150 
151 #define DRM_COMPONENT_DRIVER	BIT(0)	/* supports component framework */
152 #define DRM_VIRTUAL_DEVICE	BIT(1)	/* create virtual platform device */
153 #define DRM_FIMC_DEVICE		BIT(2)	/* devices shared with V4L2 subsystem */
154 
155 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
156 
157 /*
158  * Connector drivers should not be placed before associated crtc drivers,
159  * because connector requires pipe number of its crtc during initialization.
160  */
161 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
162 	{
163 		DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
164 		DRM_COMPONENT_DRIVER
165 	}, {
166 		DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
167 		DRM_COMPONENT_DRIVER
168 	}, {
169 		DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
170 		DRM_COMPONENT_DRIVER
171 	}, {
172 		DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
173 		DRM_COMPONENT_DRIVER
174 	}, {
175 		DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
176 		DRM_COMPONENT_DRIVER
177 	}, {
178 		DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
179 		DRM_COMPONENT_DRIVER
180 	}, {
181 		DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
182 		DRM_COMPONENT_DRIVER
183 	}, {
184 		DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
185 		DRM_COMPONENT_DRIVER
186 	}, {
187 		DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
188 		DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
189 	}, {
190 		DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
191 		DRM_COMPONENT_DRIVER
192 	}, {
193 		DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
194 		DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
195 	}, {
196 		DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
197 		DRM_COMPONENT_DRIVER
198 	}, {
199 		DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
200 		DRM_COMPONENT_DRIVER
201 	}, {
202 		DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
203 		DRM_COMPONENT_DRIVER
204 	}, {
205 		&exynos_drm_platform_driver,
206 		DRM_VIRTUAL_DEVICE
207 	}
208 };
209 
210 static struct component_match *exynos_drm_match_add(struct device *dev)
211 {
212 	struct component_match *match = NULL;
213 	int i;
214 
215 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
216 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
217 		struct device *p = NULL, *d;
218 
219 		if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
220 			continue;
221 
222 		while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
223 			put_device(p);
224 
225 			if (!(info->flags & DRM_FIMC_DEVICE) ||
226 			    exynos_drm_check_fimc_device(d) == 0)
227 				component_match_add(dev, &match, component_compare_dev, d);
228 			p = d;
229 		}
230 		put_device(p);
231 	}
232 
233 	return match ?: ERR_PTR(-ENODEV);
234 }
235 
236 static int exynos_drm_bind(struct device *dev)
237 {
238 	struct exynos_drm_private *private;
239 	struct drm_encoder *encoder;
240 	struct drm_device *drm;
241 	unsigned int clone_mask;
242 	int ret;
243 
244 	drm = drm_dev_alloc(&exynos_drm_driver, dev);
245 	if (IS_ERR(drm))
246 		return PTR_ERR(drm);
247 
248 	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
249 	if (!private) {
250 		ret = -ENOMEM;
251 		goto err_free_drm;
252 	}
253 
254 	init_waitqueue_head(&private->wait);
255 	spin_lock_init(&private->lock);
256 
257 	dev_set_drvdata(dev, drm);
258 	drm->dev_private = (void *)private;
259 
260 	drm_mode_config_init(drm);
261 
262 	exynos_drm_mode_config_init(drm);
263 
264 	/* setup possible_clones. */
265 	clone_mask = 0;
266 	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
267 		clone_mask |= drm_encoder_mask(encoder);
268 
269 	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
270 		encoder->possible_clones = clone_mask;
271 
272 	/* Try to bind all sub drivers. */
273 	ret = component_bind_all(drm->dev, drm);
274 	if (ret)
275 		goto err_mode_config_cleanup;
276 
277 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
278 	if (ret)
279 		goto err_unbind_all;
280 
281 	drm_mode_config_reset(drm);
282 
283 	/* init kms poll for handling hpd */
284 	drm_kms_helper_poll_init(drm);
285 
286 	/* register the DRM device */
287 	ret = drm_dev_register(drm, 0);
288 	if (ret < 0)
289 		goto err_cleanup_poll;
290 
291 	exynos_drm_fbdev_setup(drm);
292 
293 	return 0;
294 
295 err_cleanup_poll:
296 	drm_kms_helper_poll_fini(drm);
297 err_unbind_all:
298 	component_unbind_all(drm->dev, drm);
299 err_mode_config_cleanup:
300 	drm_mode_config_cleanup(drm);
301 	exynos_drm_cleanup_dma(drm);
302 	kfree(private);
303 	dev_set_drvdata(dev, NULL);
304 err_free_drm:
305 	drm_dev_put(drm);
306 
307 	return ret;
308 }
309 
310 static void exynos_drm_unbind(struct device *dev)
311 {
312 	struct drm_device *drm = dev_get_drvdata(dev);
313 
314 	drm_dev_unregister(drm);
315 
316 	drm_kms_helper_poll_fini(drm);
317 	drm_atomic_helper_shutdown(drm);
318 
319 	component_unbind_all(drm->dev, drm);
320 	drm_mode_config_cleanup(drm);
321 	exynos_drm_cleanup_dma(drm);
322 
323 	kfree(drm->dev_private);
324 	drm->dev_private = NULL;
325 	dev_set_drvdata(dev, NULL);
326 
327 	drm_dev_put(drm);
328 }
329 
330 static const struct component_master_ops exynos_drm_ops = {
331 	.bind		= exynos_drm_bind,
332 	.unbind		= exynos_drm_unbind,
333 };
334 
335 static int exynos_drm_platform_probe(struct platform_device *pdev)
336 {
337 	struct component_match *match;
338 
339 	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
340 
341 	match = exynos_drm_match_add(&pdev->dev);
342 	if (IS_ERR(match))
343 		return PTR_ERR(match);
344 
345 	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
346 					       match);
347 }
348 
349 static int exynos_drm_platform_remove(struct platform_device *pdev)
350 {
351 	component_master_del(&pdev->dev, &exynos_drm_ops);
352 	return 0;
353 }
354 
355 static void exynos_drm_platform_shutdown(struct platform_device *pdev)
356 {
357 	struct drm_device *drm = platform_get_drvdata(pdev);
358 
359 	if (drm)
360 		drm_atomic_helper_shutdown(drm);
361 }
362 
363 static struct platform_driver exynos_drm_platform_driver = {
364 	.probe	= exynos_drm_platform_probe,
365 	.remove	= exynos_drm_platform_remove,
366 	.shutdown = exynos_drm_platform_shutdown,
367 	.driver	= {
368 		.name	= "exynos-drm",
369 		.pm	= &exynos_drm_pm_ops,
370 	},
371 };
372 
373 static void exynos_drm_unregister_devices(void)
374 {
375 	int i;
376 
377 	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
378 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
379 		struct device *dev;
380 
381 		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
382 			continue;
383 
384 		while ((dev = platform_find_device_by_driver(NULL,
385 						&info->driver->driver))) {
386 			put_device(dev);
387 			platform_device_unregister(to_platform_device(dev));
388 		}
389 	}
390 }
391 
392 static int exynos_drm_register_devices(void)
393 {
394 	struct platform_device *pdev;
395 	int i;
396 
397 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
398 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
399 
400 		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
401 			continue;
402 
403 		pdev = platform_device_register_simple(
404 					info->driver->driver.name, -1, NULL, 0);
405 		if (IS_ERR(pdev))
406 			goto fail;
407 	}
408 
409 	return 0;
410 fail:
411 	exynos_drm_unregister_devices();
412 	return PTR_ERR(pdev);
413 }
414 
415 static void exynos_drm_unregister_drivers(void)
416 {
417 	int i;
418 
419 	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
420 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
421 
422 		if (!info->driver)
423 			continue;
424 
425 		platform_driver_unregister(info->driver);
426 	}
427 }
428 
429 static int exynos_drm_register_drivers(void)
430 {
431 	int i, ret;
432 
433 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
434 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
435 
436 		if (!info->driver)
437 			continue;
438 
439 		ret = platform_driver_register(info->driver);
440 		if (ret)
441 			goto fail;
442 	}
443 	return 0;
444 fail:
445 	exynos_drm_unregister_drivers();
446 	return ret;
447 }
448 
449 static int exynos_drm_init(void)
450 {
451 	int ret;
452 
453 	if (drm_firmware_drivers_only())
454 		return -ENODEV;
455 
456 	ret = exynos_drm_register_devices();
457 	if (ret)
458 		return ret;
459 
460 	ret = exynos_drm_register_drivers();
461 	if (ret)
462 		goto err_unregister_pdevs;
463 
464 	return 0;
465 
466 err_unregister_pdevs:
467 	exynos_drm_unregister_devices();
468 
469 	return ret;
470 }
471 
472 static void exynos_drm_exit(void)
473 {
474 	exynos_drm_unregister_drivers();
475 	exynos_drm_unregister_devices();
476 }
477 
478 module_init(exynos_drm_init);
479 module_exit(exynos_drm_exit);
480 
481 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
482 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
483 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
484 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
485 MODULE_LICENSE("GPL");
486