xref: /linux/drivers/gpu/drm/exynos/exynos_drm_drv.c (revision bba2c3615bd6cfee7456d1130f2e6b01b3f4e9ba) 
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/clients/drm_client_setup.h>
17 #include <drm/drm_atomic.h>
18 #include <drm/drm_atomic_helper.h>
19 #include <drm/drm_drv.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 
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_obj(*file_priv);
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_sg_table	= exynos_drm_gem_prime_import_sg_table,
113 	EXYNOS_DRM_FBDEV_DRIVER_OPS,
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 	.major	= DRIVER_MAJOR,
120 	.minor	= DRIVER_MINOR,
121 };
122 
123 static int exynos_drm_suspend(struct device *dev)
124 {
125 	struct drm_device *drm_dev = dev_get_drvdata(dev);
126 
127 	return  drm_mode_config_helper_suspend(drm_dev);
128 }
129 
130 static void exynos_drm_resume(struct device *dev)
131 {
132 	struct drm_device *drm_dev = dev_get_drvdata(dev);
133 
134 	drm_mode_config_helper_resume(drm_dev);
135 }
136 
137 static const struct dev_pm_ops exynos_drm_pm_ops = {
138 	.prepare = exynos_drm_suspend,
139 	.complete = exynos_drm_resume,
140 };
141 
142 /* forward declaration */
143 static struct platform_driver exynos_drm_platform_driver;
144 
145 struct exynos_drm_driver_info {
146 	struct platform_driver *driver;
147 	unsigned int flags;
148 };
149 
150 #define DRM_COMPONENT_DRIVER	BIT(0)	/* supports component framework */
151 #define DRM_VIRTUAL_DEVICE	BIT(1)	/* create virtual platform device */
152 #define DRM_FIMC_DEVICE		BIT(2)	/* devices shared with V4L2 subsystem */
153 
154 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
155 
156 /*
157  * Connector drivers should not be placed before associated crtc drivers,
158  * because connector requires pipe number of its crtc during initialization.
159  */
160 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
161 	{
162 		DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
163 		DRM_COMPONENT_DRIVER
164 	}, {
165 		DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
166 		DRM_COMPONENT_DRIVER
167 	}, {
168 		DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
169 		DRM_COMPONENT_DRIVER
170 	}, {
171 		DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
172 		DRM_COMPONENT_DRIVER
173 	}, {
174 		DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
175 		DRM_COMPONENT_DRIVER
176 	}, {
177 		DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
178 		DRM_COMPONENT_DRIVER
179 	}, {
180 		DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
181 		DRM_COMPONENT_DRIVER
182 	}, {
183 		DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
184 		DRM_COMPONENT_DRIVER
185 	}, {
186 		DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
187 		DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
188 	}, {
189 		DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
190 		DRM_COMPONENT_DRIVER
191 	}, {
192 		DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
193 		DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
194 	}, {
195 		DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
196 		DRM_COMPONENT_DRIVER
197 	}, {
198 		DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
199 		DRM_COMPONENT_DRIVER
200 	}, {
201 		DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
202 		DRM_COMPONENT_DRIVER
203 	}, {
204 		&exynos_drm_platform_driver,
205 		DRM_VIRTUAL_DEVICE
206 	}
207 };
208 
209 static struct component_match *exynos_drm_match_add(struct device *dev)
210 {
211 	struct component_match *match = NULL;
212 	int i;
213 
214 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
215 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
216 		struct device *p = NULL, *d;
217 
218 		if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
219 			continue;
220 
221 		while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
222 			put_device(p);
223 
224 			if (!(info->flags & DRM_FIMC_DEVICE) ||
225 			    exynos_drm_check_fimc_device(d) == 0)
226 				component_match_add(dev, &match, component_compare_dev, d);
227 			p = d;
228 		}
229 		put_device(p);
230 	}
231 
232 	return match ?: ERR_PTR(-ENODEV);
233 }
234 
235 static int exynos_drm_bind(struct device *dev)
236 {
237 	struct exynos_drm_private *private;
238 	struct drm_encoder *encoder;
239 	struct drm_device *drm;
240 	unsigned int clone_mask;
241 	int ret;
242 
243 	drm = drm_dev_alloc(&exynos_drm_driver, dev);
244 	if (IS_ERR(drm))
245 		return PTR_ERR(drm);
246 
247 	private = kzalloc_obj(struct exynos_drm_private);
248 	if (!private) {
249 		ret = -ENOMEM;
250 		goto err_free_drm;
251 	}
252 
253 	init_waitqueue_head(&private->wait);
254 	spin_lock_init(&private->lock);
255 
256 	dev_set_drvdata(dev, drm);
257 	drm->dev_private = (void *)private;
258 
259 	drm_mode_config_init(drm);
260 
261 	exynos_drm_mode_config_init(drm);
262 
263 	/* setup possible_clones. */
264 	clone_mask = 0;
265 	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
266 		clone_mask |= drm_encoder_mask(encoder);
267 
268 	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
269 		encoder->possible_clones = clone_mask;
270 
271 	/* Try to bind all sub drivers. */
272 	ret = component_bind_all(drm->dev, drm);
273 	if (ret)
274 		goto err_mode_config_cleanup;
275 
276 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
277 	if (ret)
278 		goto err_unbind_all;
279 
280 	drm_mode_config_reset(drm);
281 
282 	/* init kms poll for handling hpd */
283 	drm_kms_helper_poll_init(drm);
284 
285 	/* register the DRM device */
286 	ret = drm_dev_register(drm, 0);
287 	if (ret < 0)
288 		goto err_cleanup_poll;
289 
290 	drm_client_setup(drm, NULL);
291 
292 	return 0;
293 
294 err_cleanup_poll:
295 	drm_kms_helper_poll_fini(drm);
296 err_unbind_all:
297 	component_unbind_all(drm->dev, drm);
298 err_mode_config_cleanup:
299 	drm_mode_config_cleanup(drm);
300 	exynos_drm_cleanup_dma(drm);
301 	kfree(private);
302 	dev_set_drvdata(dev, NULL);
303 err_free_drm:
304 	drm_dev_put(drm);
305 
306 	return ret;
307 }
308 
309 static void exynos_drm_unbind(struct device *dev)
310 {
311 	struct drm_device *drm = dev_get_drvdata(dev);
312 
313 	drm_dev_unregister(drm);
314 
315 	drm_kms_helper_poll_fini(drm);
316 	drm_atomic_helper_shutdown(drm);
317 
318 	component_unbind_all(drm->dev, drm);
319 	drm_mode_config_cleanup(drm);
320 	exynos_drm_cleanup_dma(drm);
321 
322 	kfree(drm->dev_private);
323 	drm->dev_private = NULL;
324 	dev_set_drvdata(dev, NULL);
325 
326 	drm_dev_put(drm);
327 }
328 
329 static const struct component_master_ops exynos_drm_ops = {
330 	.bind		= exynos_drm_bind,
331 	.unbind		= exynos_drm_unbind,
332 };
333 
334 static int exynos_drm_platform_probe(struct platform_device *pdev)
335 {
336 	struct component_match *match;
337 
338 	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
339 
340 	match = exynos_drm_match_add(&pdev->dev);
341 	if (IS_ERR(match))
342 		return PTR_ERR(match);
343 
344 	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
345 					       match);
346 }
347 
348 static void exynos_drm_platform_remove(struct platform_device *pdev)
349 {
350 	component_master_del(&pdev->dev, &exynos_drm_ops);
351 }
352 
353 static void exynos_drm_platform_shutdown(struct platform_device *pdev)
354 {
355 	struct drm_device *drm = platform_get_drvdata(pdev);
356 
357 	drm_atomic_helper_shutdown(drm);
358 }
359 
360 static struct platform_driver exynos_drm_platform_driver = {
361 	.probe	= exynos_drm_platform_probe,
362 	.remove		= exynos_drm_platform_remove,
363 	.shutdown = exynos_drm_platform_shutdown,
364 	.driver	= {
365 		.name	= "exynos-drm",
366 		.pm	= &exynos_drm_pm_ops,
367 	},
368 };
369 
370 static void exynos_drm_unregister_devices(void)
371 {
372 	int i;
373 
374 	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
375 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
376 		struct device *dev;
377 
378 		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
379 			continue;
380 
381 		while ((dev = platform_find_device_by_driver(NULL,
382 						&info->driver->driver))) {
383 			put_device(dev);
384 			platform_device_unregister(to_platform_device(dev));
385 		}
386 	}
387 }
388 
389 static int exynos_drm_register_devices(void)
390 {
391 	struct platform_device *pdev;
392 	int i;
393 
394 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
395 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
396 
397 		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
398 			continue;
399 
400 		pdev = platform_device_register_simple(
401 					info->driver->driver.name, -1, NULL, 0);
402 		if (IS_ERR(pdev))
403 			goto fail;
404 	}
405 
406 	return 0;
407 fail:
408 	exynos_drm_unregister_devices();
409 	return PTR_ERR(pdev);
410 }
411 
412 static void exynos_drm_unregister_drivers(void)
413 {
414 	int i;
415 
416 	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
417 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
418 
419 		if (!info->driver)
420 			continue;
421 
422 		platform_driver_unregister(info->driver);
423 	}
424 }
425 
426 static int exynos_drm_register_drivers(void)
427 {
428 	int i, ret;
429 
430 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
431 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
432 
433 		if (!info->driver)
434 			continue;
435 
436 		ret = platform_driver_register(info->driver);
437 		if (ret)
438 			goto fail;
439 	}
440 	return 0;
441 fail:
442 	exynos_drm_unregister_drivers();
443 	return ret;
444 }
445 
446 static int exynos_drm_init(void)
447 {
448 	int ret;
449 
450 	if (drm_firmware_drivers_only())
451 		return -ENODEV;
452 
453 	ret = exynos_drm_register_devices();
454 	if (ret)
455 		return ret;
456 
457 	ret = exynos_drm_register_drivers();
458 	if (ret)
459 		goto err_unregister_pdevs;
460 
461 	return 0;
462 
463 err_unregister_pdevs:
464 	exynos_drm_unregister_devices();
465 
466 	return ret;
467 }
468 
469 static void exynos_drm_exit(void)
470 {
471 	exynos_drm_unregister_drivers();
472 	exynos_drm_unregister_devices();
473 }
474 
475 module_init(exynos_drm_init);
476 module_exit(exynos_drm_exit);
477 
478 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
479 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
480 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
481 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
482 MODULE_LICENSE("GPL");
483