xref: /linux/drivers/gpu/drm/exynos/exynos_drm_drv.c (revision 7f4f3b14e8079ecde096bd734af10e30d40c27b7) 
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_client_setup.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 #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 	.postclose		= exynos_drm_postclose,
112 	.dumb_create		= exynos_drm_gem_dumb_create,
113 	.gem_prime_import	= exynos_drm_gem_prime_import,
114 	.gem_prime_import_sg_table	= exynos_drm_gem_prime_import_sg_table,
115 	EXYNOS_DRM_FBDEV_DRIVER_OPS,
116 	.ioctls			= exynos_ioctls,
117 	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
118 	.fops			= &exynos_drm_driver_fops,
119 	.name	= DRIVER_NAME,
120 	.desc	= DRIVER_DESC,
121 	.date	= DRIVER_DATE,
122 	.major	= DRIVER_MAJOR,
123 	.minor	= DRIVER_MINOR,
124 };
125 
126 static int exynos_drm_suspend(struct device *dev)
127 {
128 	struct drm_device *drm_dev = dev_get_drvdata(dev);
129 
130 	return  drm_mode_config_helper_suspend(drm_dev);
131 }
132 
133 static void exynos_drm_resume(struct device *dev)
134 {
135 	struct drm_device *drm_dev = dev_get_drvdata(dev);
136 
137 	drm_mode_config_helper_resume(drm_dev);
138 }
139 
140 static const struct dev_pm_ops exynos_drm_pm_ops = {
141 	.prepare = exynos_drm_suspend,
142 	.complete = exynos_drm_resume,
143 };
144 
145 /* forward declaration */
146 static struct platform_driver exynos_drm_platform_driver;
147 
148 struct exynos_drm_driver_info {
149 	struct platform_driver *driver;
150 	unsigned int flags;
151 };
152 
153 #define DRM_COMPONENT_DRIVER	BIT(0)	/* supports component framework */
154 #define DRM_VIRTUAL_DEVICE	BIT(1)	/* create virtual platform device */
155 #define DRM_FIMC_DEVICE		BIT(2)	/* devices shared with V4L2 subsystem */
156 
157 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
158 
159 /*
160  * Connector drivers should not be placed before associated crtc drivers,
161  * because connector requires pipe number of its crtc during initialization.
162  */
163 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
164 	{
165 		DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
166 		DRM_COMPONENT_DRIVER
167 	}, {
168 		DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
169 		DRM_COMPONENT_DRIVER
170 	}, {
171 		DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
172 		DRM_COMPONENT_DRIVER
173 	}, {
174 		DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
175 		DRM_COMPONENT_DRIVER
176 	}, {
177 		DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
178 		DRM_COMPONENT_DRIVER
179 	}, {
180 		DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
181 		DRM_COMPONENT_DRIVER
182 	}, {
183 		DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
184 		DRM_COMPONENT_DRIVER
185 	}, {
186 		DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
187 		DRM_COMPONENT_DRIVER
188 	}, {
189 		DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
190 		DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
191 	}, {
192 		DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
193 		DRM_COMPONENT_DRIVER
194 	}, {
195 		DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
196 		DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
197 	}, {
198 		DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
199 		DRM_COMPONENT_DRIVER
200 	}, {
201 		DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
202 		DRM_COMPONENT_DRIVER
203 	}, {
204 		DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
205 		DRM_COMPONENT_DRIVER
206 	}, {
207 		&exynos_drm_platform_driver,
208 		DRM_VIRTUAL_DEVICE
209 	}
210 };
211 
212 static struct component_match *exynos_drm_match_add(struct device *dev)
213 {
214 	struct component_match *match = NULL;
215 	int i;
216 
217 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
218 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
219 		struct device *p = NULL, *d;
220 
221 		if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
222 			continue;
223 
224 		while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
225 			put_device(p);
226 
227 			if (!(info->flags & DRM_FIMC_DEVICE) ||
228 			    exynos_drm_check_fimc_device(d) == 0)
229 				component_match_add(dev, &match, component_compare_dev, d);
230 			p = d;
231 		}
232 		put_device(p);
233 	}
234 
235 	return match ?: ERR_PTR(-ENODEV);
236 }
237 
238 static int exynos_drm_bind(struct device *dev)
239 {
240 	struct exynos_drm_private *private;
241 	struct drm_encoder *encoder;
242 	struct drm_device *drm;
243 	unsigned int clone_mask;
244 	int ret;
245 
246 	drm = drm_dev_alloc(&exynos_drm_driver, dev);
247 	if (IS_ERR(drm))
248 		return PTR_ERR(drm);
249 
250 	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
251 	if (!private) {
252 		ret = -ENOMEM;
253 		goto err_free_drm;
254 	}
255 
256 	init_waitqueue_head(&private->wait);
257 	spin_lock_init(&private->lock);
258 
259 	dev_set_drvdata(dev, drm);
260 	drm->dev_private = (void *)private;
261 
262 	drm_mode_config_init(drm);
263 
264 	exynos_drm_mode_config_init(drm);
265 
266 	/* setup possible_clones. */
267 	clone_mask = 0;
268 	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
269 		clone_mask |= drm_encoder_mask(encoder);
270 
271 	list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
272 		encoder->possible_clones = clone_mask;
273 
274 	/* Try to bind all sub drivers. */
275 	ret = component_bind_all(drm->dev, drm);
276 	if (ret)
277 		goto err_mode_config_cleanup;
278 
279 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
280 	if (ret)
281 		goto err_unbind_all;
282 
283 	drm_mode_config_reset(drm);
284 
285 	/* init kms poll for handling hpd */
286 	drm_kms_helper_poll_init(drm);
287 
288 	/* register the DRM device */
289 	ret = drm_dev_register(drm, 0);
290 	if (ret < 0)
291 		goto err_cleanup_poll;
292 
293 	drm_client_setup(drm, NULL);
294 
295 	return 0;
296 
297 err_cleanup_poll:
298 	drm_kms_helper_poll_fini(drm);
299 err_unbind_all:
300 	component_unbind_all(drm->dev, drm);
301 err_mode_config_cleanup:
302 	drm_mode_config_cleanup(drm);
303 	exynos_drm_cleanup_dma(drm);
304 	kfree(private);
305 	dev_set_drvdata(dev, NULL);
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 	drm_atomic_helper_shutdown(drm);
320 
321 	component_unbind_all(drm->dev, drm);
322 	drm_mode_config_cleanup(drm);
323 	exynos_drm_cleanup_dma(drm);
324 
325 	kfree(drm->dev_private);
326 	drm->dev_private = NULL;
327 	dev_set_drvdata(dev, NULL);
328 
329 	drm_dev_put(drm);
330 }
331 
332 static const struct component_master_ops exynos_drm_ops = {
333 	.bind		= exynos_drm_bind,
334 	.unbind		= exynos_drm_unbind,
335 };
336 
337 static int exynos_drm_platform_probe(struct platform_device *pdev)
338 {
339 	struct component_match *match;
340 
341 	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
342 
343 	match = exynos_drm_match_add(&pdev->dev);
344 	if (IS_ERR(match))
345 		return PTR_ERR(match);
346 
347 	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
348 					       match);
349 }
350 
351 static void exynos_drm_platform_remove(struct platform_device *pdev)
352 {
353 	component_master_del(&pdev->dev, &exynos_drm_ops);
354 }
355 
356 static void exynos_drm_platform_shutdown(struct platform_device *pdev)
357 {
358 	struct drm_device *drm = platform_get_drvdata(pdev);
359 
360 	if (drm)
361 		drm_atomic_helper_shutdown(drm);
362 }
363 
364 static struct platform_driver exynos_drm_platform_driver = {
365 	.probe	= exynos_drm_platform_probe,
366 	.remove_new	= exynos_drm_platform_remove,
367 	.shutdown = exynos_drm_platform_shutdown,
368 	.driver	= {
369 		.name	= "exynos-drm",
370 		.pm	= &exynos_drm_pm_ops,
371 	},
372 };
373 
374 static void exynos_drm_unregister_devices(void)
375 {
376 	int i;
377 
378 	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
379 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
380 		struct device *dev;
381 
382 		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
383 			continue;
384 
385 		while ((dev = platform_find_device_by_driver(NULL,
386 						&info->driver->driver))) {
387 			put_device(dev);
388 			platform_device_unregister(to_platform_device(dev));
389 		}
390 	}
391 }
392 
393 static int exynos_drm_register_devices(void)
394 {
395 	struct platform_device *pdev;
396 	int i;
397 
398 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
399 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
400 
401 		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
402 			continue;
403 
404 		pdev = platform_device_register_simple(
405 					info->driver->driver.name, -1, NULL, 0);
406 		if (IS_ERR(pdev))
407 			goto fail;
408 	}
409 
410 	return 0;
411 fail:
412 	exynos_drm_unregister_devices();
413 	return PTR_ERR(pdev);
414 }
415 
416 static void exynos_drm_unregister_drivers(void)
417 {
418 	int i;
419 
420 	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
421 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
422 
423 		if (!info->driver)
424 			continue;
425 
426 		platform_driver_unregister(info->driver);
427 	}
428 }
429 
430 static int exynos_drm_register_drivers(void)
431 {
432 	int i, ret;
433 
434 	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
435 		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
436 
437 		if (!info->driver)
438 			continue;
439 
440 		ret = platform_driver_register(info->driver);
441 		if (ret)
442 			goto fail;
443 	}
444 	return 0;
445 fail:
446 	exynos_drm_unregister_drivers();
447 	return ret;
448 }
449 
450 static int exynos_drm_init(void)
451 {
452 	int ret;
453 
454 	if (drm_firmware_drivers_only())
455 		return -ENODEV;
456 
457 	ret = exynos_drm_register_devices();
458 	if (ret)
459 		return ret;
460 
461 	ret = exynos_drm_register_drivers();
462 	if (ret)
463 		goto err_unregister_pdevs;
464 
465 	return 0;
466 
467 err_unregister_pdevs:
468 	exynos_drm_unregister_devices();
469 
470 	return ret;
471 }
472 
473 static void exynos_drm_exit(void)
474 {
475 	exynos_drm_unregister_drivers();
476 	exynos_drm_unregister_devices();
477 }
478 
479 module_init(exynos_drm_init);
480 module_exit(exynos_drm_exit);
481 
482 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
483 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
484 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
485 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
486 MODULE_LICENSE("GPL");
487