summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_encoder.c
blob: 06f1b2a09da7a1d2c1f4f556db86f299d872a081 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
/* exynos_drm_encoder.c
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>

#include "exynos_drm_drv.h"
#include "exynos_drm_encoder.h"
#include "exynos_drm_connector.h"

#define to_exynos_encoder(x)	container_of(x, struct exynos_drm_encoder,\
				drm_encoder)

/*
 * exynos specific encoder structure.
 *
 * @drm_encoder: encoder object.
 * @manager: specific encoder has its own manager to control a hardware
 *	appropriately and we can access a hardware drawing on this manager.
 * @dpms: store the encoder dpms value.
 * @updated: indicate whether overlay data updating is needed or not.
 */
struct exynos_drm_encoder {
	struct drm_crtc			*old_crtc;
	struct drm_encoder		drm_encoder;
	struct exynos_drm_manager	*manager;
	int				dpms;
	bool				updated;
};

static void exynos_drm_connector_power(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_connector *connector;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		if (exynos_drm_best_encoder(connector) == encoder) {
			DRM_DEBUG_KMS("connector[%d] dpms[%d]\n",
					connector->base.id, mode);

			exynos_drm_display_power(connector, mode);
		}
	}
}

static void exynos_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);

	DRM_DEBUG_KMS("encoder dpms: %d\n", mode);

	if (exynos_encoder->dpms == mode) {
		DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
		return;
	}

	mutex_lock(&dev->struct_mutex);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		if (manager_ops && manager_ops->apply)
			if (!exynos_encoder->updated)
				manager_ops->apply(manager->dev);

		exynos_drm_connector_power(encoder, mode);
		exynos_encoder->dpms = mode;
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		exynos_drm_connector_power(encoder, mode);
		exynos_encoder->dpms = mode;
		exynos_encoder->updated = false;
		break;
	default:
		DRM_ERROR("unspecified mode %d\n", mode);
		break;
	}

	mutex_unlock(&dev->struct_mutex);
}

static bool
exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
			       const struct drm_display_mode *mode,
			       struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_connector *connector;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct exynos_drm_manager_ops *manager_ops = manager->ops;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		if (connector->encoder == encoder)
			if (manager_ops && manager_ops->mode_fixup)
				manager_ops->mode_fixup(manager->dev, connector,
							mode, adjusted_mode);
	}

	return true;
}

static void disable_plane_to_crtc(struct drm_device *dev,
						struct drm_crtc *old_crtc,
						struct drm_crtc *new_crtc)
{
	struct drm_plane *plane;

	/*
	 * if old_crtc isn't same as encoder->crtc then it means that
	 * user changed crtc id to another one so the plane to old_crtc
	 * should be disabled and plane->crtc should be set to new_crtc
	 * (encoder->crtc)
	 */
	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
		if (plane->crtc == old_crtc) {
			/*
			 * do not change below call order.
			 *
			 * plane->funcs->disable_plane call checks
			 * if encoder->crtc is same as plane->crtc and if same
			 * then overlay_ops->disable callback will be called
			 * to diasble current hw overlay so plane->crtc should
			 * have new_crtc because new_crtc was set to
			 * encoder->crtc in advance.
			 */
			plane->crtc = new_crtc;
			plane->funcs->disable_plane(plane);
		}
	}
}

static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
					 struct drm_display_mode *mode,
					 struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_connector *connector;
	struct exynos_drm_manager *manager;
	struct exynos_drm_manager_ops *manager_ops;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		if (connector->encoder == encoder) {
			struct exynos_drm_encoder *exynos_encoder;

			exynos_encoder = to_exynos_encoder(encoder);

			if (exynos_encoder->old_crtc != encoder->crtc &&
					exynos_encoder->old_crtc) {

				/*
				 * disable a plane to old crtc and change
				 * crtc of the plane to new one.
				 */
				disable_plane_to_crtc(dev,
						exynos_encoder->old_crtc,
						encoder->crtc);
			}

			manager = exynos_drm_get_manager(encoder);
			manager_ops = manager->ops;

			if (manager_ops && manager_ops->mode_set)
				manager_ops->mode_set(manager->dev,
							adjusted_mode);

			exynos_encoder->old_crtc = encoder->crtc;
		}
	}
}

static void exynos_drm_encoder_prepare(struct drm_encoder *encoder)
{
	/* drm framework doesn't check NULL. */
}

static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
{
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
	struct exynos_drm_manager *manager = exynos_encoder->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;

	if (manager_ops && manager_ops->commit)
		manager_ops->commit(manager->dev);

	/*
	 * this will avoid one issue that overlay data is updated to
	 * real hardware two times.
	 * And this variable will be used to check if the data was
	 * already updated or not by exynos_drm_encoder_dpms function.
	 */
	exynos_encoder->updated = true;

	/*
	 * In case of setcrtc, there is no way to update encoder's dpms
	 * so update it here.
	 */
	exynos_encoder->dpms = DRM_MODE_DPMS_ON;
}

void exynos_drm_encoder_complete_scanout(struct drm_framebuffer *fb)
{
	struct exynos_drm_encoder *exynos_encoder;
	struct exynos_drm_manager_ops *ops;
	struct drm_device *dev = fb->dev;
	struct drm_encoder *encoder;

	/*
	 * make sure that overlay data are updated to real hardware
	 * for all encoders.
	 */
	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		exynos_encoder = to_exynos_encoder(encoder);
		ops = exynos_encoder->manager->ops;

		/*
		 * wait for vblank interrupt
		 * - this makes sure that overlay data are updated to
		 *	real hardware.
		 */
		if (ops->wait_for_vblank)
			ops->wait_for_vblank(exynos_encoder->manager->dev);
	}
}


static void exynos_drm_encoder_disable(struct drm_encoder *encoder)
{
	struct drm_plane *plane;
	struct drm_device *dev = encoder->dev;

	exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);

	/* all planes connected to this encoder should be also disabled. */
	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
		if (plane->crtc == encoder->crtc)
			plane->funcs->disable_plane(plane);
	}
}

static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
	.dpms		= exynos_drm_encoder_dpms,
	.mode_fixup	= exynos_drm_encoder_mode_fixup,
	.mode_set	= exynos_drm_encoder_mode_set,
	.prepare	= exynos_drm_encoder_prepare,
	.commit		= exynos_drm_encoder_commit,
	.disable	= exynos_drm_encoder_disable,
};

static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
{
	struct exynos_drm_encoder *exynos_encoder =
		to_exynos_encoder(encoder);

	exynos_encoder->manager->pipe = -1;

	drm_encoder_cleanup(encoder);
	kfree(exynos_encoder);
}

static struct drm_encoder_funcs exynos_encoder_funcs = {
	.destroy = exynos_drm_encoder_destroy,
};

static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
{
	struct drm_encoder *clone;
	struct drm_device *dev = encoder->dev;
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
	struct exynos_drm_display_ops *display_ops =
				exynos_encoder->manager->display_ops;
	unsigned int clone_mask = 0;
	int cnt = 0;

	list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
		switch (display_ops->type) {
		case EXYNOS_DISPLAY_TYPE_LCD:
		case EXYNOS_DISPLAY_TYPE_HDMI:
		case EXYNOS_DISPLAY_TYPE_VIDI:
			clone_mask |= (1 << (cnt++));
			break;
		default:
			continue;
		}
	}

	return clone_mask;
}

void exynos_drm_encoder_setup(struct drm_device *dev)
{
	struct drm_encoder *encoder;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
		encoder->possible_clones = exynos_drm_encoder_clones(encoder);
}

struct drm_encoder *
exynos_drm_encoder_create(struct drm_device *dev,
			   struct exynos_drm_manager *manager,
			   unsigned int possible_crtcs)
{
	struct drm_encoder *encoder;
	struct exynos_drm_encoder *exynos_encoder;

	if (!manager || !possible_crtcs)
		return NULL;

	if (!manager->dev)
		return NULL;

	exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
	if (!exynos_encoder)
		return NULL;

	exynos_encoder->dpms = DRM_MODE_DPMS_OFF;
	exynos_encoder->manager = manager;
	encoder = &exynos_encoder->drm_encoder;
	encoder->possible_crtcs = possible_crtcs;

	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);

	drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
			DRM_MODE_ENCODER_TMDS);

	drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);

	DRM_DEBUG_KMS("encoder has been created\n");

	return encoder;
}

struct exynos_drm_manager *exynos_drm_get_manager(struct drm_encoder *encoder)
{
	return to_exynos_encoder(encoder)->manager;
}

void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
			    void (*fn)(struct drm_encoder *, void *))
{
	struct drm_device *dev = crtc->dev;
	struct drm_encoder *encoder;
	struct exynos_drm_private *private = dev->dev_private;
	struct exynos_drm_manager *manager;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		/*
		 * if crtc is detached from encoder, check pipe,
		 * otherwise check crtc attached to encoder
		 */
		if (!encoder->crtc) {
			manager = to_exynos_encoder(encoder)->manager;
			if (manager->pipe < 0 ||
					private->crtc[manager->pipe] != crtc)
				continue;
		} else {
			if (encoder->crtc != crtc)
				continue;
		}

		fn(encoder, data);
	}
}

void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	int crtc = *(int *)data;

	if (manager->pipe != crtc)
		return;

	if (manager_ops->enable_vblank)
		manager_ops->enable_vblank(manager->dev);
}

void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	int crtc = *(int *)data;

	if (manager->pipe != crtc)
		return;

	if (manager_ops->disable_vblank)
		manager_ops->disable_vblank(manager->dev);
}

void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
	struct exynos_drm_manager *manager = exynos_encoder->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	int mode = *(int *)data;

	if (manager_ops && manager_ops->dpms)
		manager_ops->dpms(manager->dev, mode);

	/*
	 * if this condition is ok then it means that the crtc is already
	 * detached from encoder and last function for detaching is properly
	 * done, so clear pipe from manager to prevent repeated call.
	 */
	if (mode > DRM_MODE_DPMS_ON) {
		if (!encoder->crtc)
			manager->pipe = -1;
	}
}

void exynos_drm_encoder_crtc_pipe(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	int pipe = *(int *)data;

	/*
	 * when crtc is detached from encoder, this pipe is used
	 * to select manager operation
	 */
	manager->pipe = pipe;
}

void exynos_drm_encoder_plane_mode_set(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	struct exynos_drm_overlay *overlay = data;

	if (overlay_ops && overlay_ops->mode_set)
		overlay_ops->mode_set(manager->dev, overlay);
}

void exynos_drm_encoder_plane_commit(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	int zpos = DEFAULT_ZPOS;

	if (data)
		zpos = *(int *)data;

	if (overlay_ops && overlay_ops->commit)
		overlay_ops->commit(manager->dev, zpos);
}

void exynos_drm_encoder_plane_enable(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	int zpos = DEFAULT_ZPOS;

	if (data)
		zpos = *(int *)data;

	if (overlay_ops && overlay_ops->enable)
		overlay_ops->enable(manager->dev, zpos);
}

void exynos_drm_encoder_plane_disable(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	int zpos = DEFAULT_ZPOS;

	if (data)
		zpos = *(int *)data;

	if (overlay_ops && overlay_ops->disable)
		overlay_ops->disable(manager->dev, zpos);
}