xref: /linux/drivers/gpu/drm/exynos/exynos_drm_drv.c (revision 908fc4c2) 
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 
49 static 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 
65 err_file_priv_free:
66 	kfree(file_priv);
67 	file->driver_priv = NULL;
68 	return ret;
69 }
70 
71 static 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 
78 static 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 
105 DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops);
106 
107 static 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 
129 static 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 
136 static 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 
143 static const struct dev_pm_ops exynos_drm_pm_ops = {
144 	.prepare = exynos_drm_suspend,
145 	.complete = exynos_drm_resume,
146 };
147 
148 /* forward declaration */
149 static struct platform_driver exynos_drm_platform_driver;
150 
151 struct 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  */
166 static 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 
215 static 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 
241 static 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 
302 err_cleanup_fbdev:
303 	exynos_drm_fbdev_fini(drm);
304 err_cleanup_poll:
305 	drm_kms_helper_poll_fini(drm);
306 err_unbind_all:
307 	component_unbind_all(drm->dev, drm);
308 err_mode_config_cleanup:
309 	drm_mode_config_cleanup(drm);
310 	exynos_drm_cleanup_dma(drm);
311 	kfree(private);
312 err_free_drm:
313 	drm_dev_put(drm);
314 
315 	return ret;
316 }
317 
318 static 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 
338 static const struct component_master_ops exynos_drm_ops = {
339 	.bind		= exynos_drm_bind,
340 	.unbind		= exynos_drm_unbind,
341 };
342 
343 static 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 
357 static int exynos_drm_platform_remove(struct platform_device *pdev)
358 {
359 	component_master_del(&pdev->dev, &exynos_drm_ops);
360 	return 0;
361 }
362 
363 static 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 
372 static 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 
391 static 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;
409 fail:
410 	exynos_drm_unregister_devices();
411 	return PTR_ERR(pdev);
412 }
413 
414 static 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 
428 static 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;
443 fail:
444 	exynos_drm_unregister_drivers();
445 	return ret;
446 }
447 
448 static 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 
465 err_unregister_pdevs:
466 	exynos_drm_unregister_devices();
467 
468 	return ret;
469 }
470 
471 static void exynos_drm_exit(void)
472 {
473 	exynos_drm_unregister_drivers();
474 	exynos_drm_unregister_devices();
475 }
476 
477 module_init(exynos_drm_init);
478 module_exit(exynos_drm_exit);
479 
480 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
481 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
482 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
483 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
484 MODULE_LICENSE("GPL");
485