exynos_drm_drv.c

  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
 48static 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
 64err_file_priv_free:
 65	kfree(file_priv);
 66	file->driver_priv = NULL;
 67	return ret;
 68}
 69
 70static 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
 77static 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
104DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops);
105
106static 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	EXYNOS_DRM_FBDEV_DRIVER_OPS,
115	.ioctls			= exynos_ioctls,
116	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
117	.fops			= &exynos_drm_driver_fops,
118	.name	= DRIVER_NAME,
119	.desc	= DRIVER_DESC,
120	.major	= DRIVER_MAJOR,
121	.minor	= DRIVER_MINOR,
122};
123
124static 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
131static 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
138static const struct dev_pm_ops exynos_drm_pm_ops = {
139	.prepare = exynos_drm_suspend,
140	.complete = exynos_drm_resume,
141};
142
143/* forward declaration */
144static struct platform_driver exynos_drm_platform_driver;
145
146struct 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 */
161static 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
210static 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
236static 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	drm_client_setup(drm, NULL);
292
293	return 0;
294
295err_cleanup_poll:
296	drm_kms_helper_poll_fini(drm);
297err_unbind_all:
298	component_unbind_all(drm->dev, drm);
299err_mode_config_cleanup:
300	drm_mode_config_cleanup(drm);
301	exynos_drm_cleanup_dma(drm);
302	kfree(private);
303	dev_set_drvdata(dev, NULL);
304err_free_drm:
305	drm_dev_put(drm);
306
307	return ret;
308}
309
310static 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
330static const struct component_master_ops exynos_drm_ops = {
331	.bind		= exynos_drm_bind,
332	.unbind		= exynos_drm_unbind,
333};
334
335static 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
349static void exynos_drm_platform_remove(struct platform_device *pdev)
350{
351	component_master_del(&pdev->dev, &exynos_drm_ops);
352}
353
354static void exynos_drm_platform_shutdown(struct platform_device *pdev)
355{
356	struct drm_device *drm = platform_get_drvdata(pdev);
357
358	drm_atomic_helper_shutdown(drm);
359}
360
361static struct platform_driver exynos_drm_platform_driver = {
362	.probe	= exynos_drm_platform_probe,
363	.remove		= exynos_drm_platform_remove,
364	.shutdown = exynos_drm_platform_shutdown,
365	.driver	= {
366		.name	= "exynos-drm",
367		.pm	= &exynos_drm_pm_ops,
368	},
369};
370
371static void exynos_drm_unregister_devices(void)
372{
373	int i;
374
375	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
376		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
377		struct device *dev;
378
379		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
380			continue;
381
382		while ((dev = platform_find_device_by_driver(NULL,
383						&info->driver->driver))) {
384			put_device(dev);
385			platform_device_unregister(to_platform_device(dev));
386		}
387	}
388}
389
390static int exynos_drm_register_devices(void)
391{
392	struct platform_device *pdev;
393	int i;
394
395	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
396		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
397
398		if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
399			continue;
400
401		pdev = platform_device_register_simple(
402					info->driver->driver.name, -1, NULL, 0);
403		if (IS_ERR(pdev))
404			goto fail;
405	}
406
407	return 0;
408fail:
409	exynos_drm_unregister_devices();
410	return PTR_ERR(pdev);
411}
412
413static void exynos_drm_unregister_drivers(void)
414{
415	int i;
416
417	for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
418		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
419
420		if (!info->driver)
421			continue;
422
423		platform_driver_unregister(info->driver);
424	}
425}
426
427static int exynos_drm_register_drivers(void)
428{
429	int i, ret;
430
431	for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
432		struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
433
434		if (!info->driver)
435			continue;
436
437		ret = platform_driver_register(info->driver);
438		if (ret)
439			goto fail;
440	}
441	return 0;
442fail:
443	exynos_drm_unregister_drivers();
444	return ret;
445}
446
447static int exynos_drm_init(void)
448{
449	int ret;
450
451	if (drm_firmware_drivers_only())
452		return -ENODEV;
453
454	ret = exynos_drm_register_devices();
455	if (ret)
456		return ret;
457
458	ret = exynos_drm_register_drivers();
459	if (ret)
460		goto err_unregister_pdevs;
461
462	return 0;
463
464err_unregister_pdevs:
465	exynos_drm_unregister_devices();
466
467	return ret;
468}
469
470static void exynos_drm_exit(void)
471{
472	exynos_drm_unregister_drivers();
473	exynos_drm_unregister_devices();
474}
475
476module_init(exynos_drm_init);
477module_exit(exynos_drm_exit);
478
479MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
480MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
481MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
482MODULE_DESCRIPTION("Samsung SoC DRM Driver");
483MODULE_LICENSE("GPL");