summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/sti/sti_drm_crtc.c
blob: f527997fe624d5eb35208816f050c0712cdb11d9 (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
/*
 * Copyright (C) STMicroelectronics SA 2014
 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
 *          Fabien Dessenne <fabien.dessenne@st.com>
 *          for STMicroelectronics.
 * License terms:  GNU General Public License (GPL), version 2
 */

#include <linux/clk.h>

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

#include "sti_compositor.h"
#include "sti_drm_drv.h"
#include "sti_drm_crtc.h"
#include "sti_vtg.h"

static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
	DRM_DEBUG_KMS("\n");
}

static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct device *dev = mixer->dev;
	struct sti_compositor *compo = dev_get_drvdata(dev);

	compo->enable = true;

	/* Prepare and enable the compo IP clock */
	if (mixer->id == STI_MIXER_MAIN) {
		if (clk_prepare_enable(compo->clk_compo_main))
			DRM_INFO("Failed to prepare/enable compo_main clk\n");
	} else {
		if (clk_prepare_enable(compo->clk_compo_aux))
			DRM_INFO("Failed to prepare/enable compo_aux clk\n");
	}

	sti_mixer_clear_all_layers(mixer);
}

static void sti_drm_crtc_commit(struct drm_crtc *crtc)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct device *dev = mixer->dev;
	struct sti_compositor *compo = dev_get_drvdata(dev);
	struct sti_layer *layer;

	if ((!mixer || !compo)) {
		DRM_ERROR("Can not find mixer or compositor)\n");
		return;
	}

	/* get GDP which is reserved to the CRTC FB */
	layer = to_sti_layer(crtc->primary);
	if (layer)
		sti_layer_commit(layer);
	else
		DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");

	/* Enable layer on mixer */
	if (sti_mixer_set_layer_status(mixer, layer, true))
		DRM_ERROR("Can not enable layer at mixer\n");
}

static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
				    const struct drm_display_mode *mode,
				    struct drm_display_mode *adjusted_mode)
{
	/* accept the provided drm_display_mode, do not fix it up */
	return true;
}

static int
sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
		      struct drm_display_mode *adjusted_mode, int x, int y,
		      struct drm_framebuffer *old_fb)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct device *dev = mixer->dev;
	struct sti_compositor *compo = dev_get_drvdata(dev);
	struct sti_layer *layer;
	struct clk *clk;
	int rate = mode->clock * 1000;
	int res;
	unsigned int w, h;

	DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d mode:%d (%s)\n",
		      crtc->base.id, sti_mixer_to_str(mixer),
		      crtc->primary->fb->base.id, mode->base.id, mode->name);

	DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
		      mode->vrefresh, mode->clock,
		      mode->hdisplay,
		      mode->hsync_start, mode->hsync_end,
		      mode->htotal,
		      mode->vdisplay,
		      mode->vsync_start, mode->vsync_end,
		      mode->vtotal, mode->type, mode->flags);

	/* Set rate and prepare/enable pixel clock */
	if (mixer->id == STI_MIXER_MAIN)
		clk = compo->clk_pix_main;
	else
		clk = compo->clk_pix_aux;

	res = clk_set_rate(clk, rate);
	if (res < 0) {
		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
		return -EINVAL;
	}
	if (clk_prepare_enable(clk)) {
		DRM_ERROR("Failed to prepare/enable pix clk\n");
		return -EINVAL;
	}

	sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
			compo->vtg_main : compo->vtg_aux, &crtc->mode);

	/* a GDP is reserved to the CRTC FB */
	layer = to_sti_layer(crtc->primary);
	if (!layer) {
		DRM_ERROR("Can not find GDP0)\n");
		return -EINVAL;
	}

	/* copy the mode data adjusted by mode_fixup() into crtc->mode
	 * so that hardware can be set to proper mode
	 */
	memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));

	res = sti_mixer_set_layer_depth(mixer, layer);
	if (res) {
		DRM_ERROR("Can not set layer depth\n");
		return -EINVAL;
	}
	res = sti_mixer_active_video_area(mixer, &crtc->mode);
	if (res) {
		DRM_ERROR("Can not set active video area\n");
		return -EINVAL;
	}

	w = crtc->primary->fb->width - x;
	h = crtc->primary->fb->height - y;

	return sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
			mixer->id, 0, 0, w, h, x, y, w, h);
}

static int sti_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
				      struct drm_framebuffer *old_fb)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct sti_layer *layer;
	unsigned int w, h;
	int ret;

	DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d (%d,%d)\n",
		      crtc->base.id, sti_mixer_to_str(mixer),
		      crtc->primary->fb->base.id, x, y);

	/* GDP is reserved to the CRTC FB */
	layer = to_sti_layer(crtc->primary);
	if (!layer) {
		DRM_ERROR("Can not find GDP0)\n");
		ret = -EINVAL;
		goto out;
	}

	w = crtc->primary->fb->width - crtc->x;
	h = crtc->primary->fb->height - crtc->y;

	ret = sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
				mixer->id, 0, 0, w, h,
				crtc->x, crtc->y, w, h);
	if (ret) {
		DRM_ERROR("Can not prepare layer\n");
		goto out;
	}

	sti_drm_crtc_commit(crtc);
out:
	return ret;
}

static void sti_drm_crtc_load_lut(struct drm_crtc *crtc)
{
	/* do nothing */
}

static void sti_drm_crtc_disable(struct drm_crtc *crtc)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct device *dev = mixer->dev;
	struct sti_compositor *compo = dev_get_drvdata(dev);
	struct sti_layer *layer;

	if (!compo->enable)
		return;

	DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));

	/* Disable Background */
	sti_mixer_set_background_status(mixer, false);

	/* Disable GDP */
	layer = to_sti_layer(crtc->primary);
	if (!layer) {
		DRM_ERROR("Cannot find GDP0\n");
		return;
	}

	/* Disable layer at mixer level */
	if (sti_mixer_set_layer_status(mixer, layer, false))
		DRM_ERROR("Can not disable %s layer at mixer\n",
				sti_layer_to_str(layer));

	/* Wait a while to be sure that a Vsync event is received */
	msleep(WAIT_NEXT_VSYNC_MS);

	/* Then disable layer itself */
	sti_layer_disable(layer);

	drm_vblank_off(crtc->dev, mixer->id);

	/* Disable pixel clock and compo IP clocks */
	if (mixer->id == STI_MIXER_MAIN) {
		clk_disable_unprepare(compo->clk_pix_main);
		clk_disable_unprepare(compo->clk_compo_main);
	} else {
		clk_disable_unprepare(compo->clk_pix_aux);
		clk_disable_unprepare(compo->clk_compo_aux);
	}

	compo->enable = false;
}

static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
	.dpms = sti_drm_crtc_dpms,
	.prepare = sti_drm_crtc_prepare,
	.commit = sti_drm_crtc_commit,
	.mode_fixup = sti_drm_crtc_mode_fixup,
	.mode_set = sti_drm_crtc_mode_set,
	.mode_set_base = sti_drm_crtc_mode_set_base,
	.load_lut = sti_drm_crtc_load_lut,
	.disable = sti_drm_crtc_disable,
};

static int sti_drm_crtc_page_flip(struct drm_crtc *crtc,
				  struct drm_framebuffer *fb,
				  struct drm_pending_vblank_event *event,
				  uint32_t page_flip_flags)
{
	struct drm_device *drm_dev = crtc->dev;
	struct drm_framebuffer *old_fb;
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	unsigned long flags;
	int ret;

	DRM_DEBUG_KMS("fb %d --> fb %d\n",
			crtc->primary->fb->base.id, fb->base.id);

	mutex_lock(&drm_dev->struct_mutex);

	old_fb = crtc->primary->fb;
	crtc->primary->fb = fb;
	ret = sti_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
	if (ret) {
		DRM_ERROR("failed\n");
		crtc->primary->fb = old_fb;
		goto out;
	}

	if (event) {
		event->pipe = mixer->id;

		ret = drm_vblank_get(drm_dev, event->pipe);
		if (ret) {
			DRM_ERROR("Cannot get vblank\n");
			goto out;
		}

		spin_lock_irqsave(&drm_dev->event_lock, flags);
		if (mixer->pending_event) {
			drm_vblank_put(drm_dev, event->pipe);
			ret = -EBUSY;
		} else {
			mixer->pending_event = event;
		}
		spin_unlock_irqrestore(&drm_dev->event_lock, flags);
	}
out:
	mutex_unlock(&drm_dev->struct_mutex);
	return ret;
}

static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
{
	DRM_DEBUG_KMS("\n");
	drm_crtc_cleanup(crtc);
}

static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
				     struct drm_property *property,
				     uint64_t val)
{
	DRM_DEBUG_KMS("\n");
	return 0;
}

int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
			   unsigned long event, void *data)
{
	struct drm_device *drm_dev;
	struct sti_compositor *compo =
		container_of(nb, struct sti_compositor, vtg_vblank_nb);
	int *crtc = data;
	unsigned long flags;
	struct sti_drm_private *priv;

	drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
	priv = drm_dev->dev_private;

	if ((event != VTG_TOP_FIELD_EVENT) &&
	    (event != VTG_BOTTOM_FIELD_EVENT)) {
		DRM_ERROR("unknown event: %lu\n", event);
		return -EINVAL;
	}

	drm_handle_vblank(drm_dev, *crtc);

	spin_lock_irqsave(&drm_dev->event_lock, flags);
	if (compo->mixer[*crtc]->pending_event) {
		drm_send_vblank_event(drm_dev, -1,
				compo->mixer[*crtc]->pending_event);
		drm_vblank_put(drm_dev, *crtc);
		compo->mixer[*crtc]->pending_event = NULL;
	}
	spin_unlock_irqrestore(&drm_dev->event_lock, flags);

	return 0;
}

int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
{
	struct sti_drm_private *dev_priv = dev->dev_private;
	struct sti_compositor *compo = dev_priv->compo;
	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;

	if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
			compo->vtg_main : compo->vtg_aux,
			vtg_vblank_nb, crtc)) {
		DRM_ERROR("Cannot register VTG notifier\n");
		return -EINVAL;
	}

	return 0;
}
EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);

void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
{
	struct sti_drm_private *priv = dev->dev_private;
	struct sti_compositor *compo = priv->compo;
	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;

	DRM_DEBUG_DRIVER("\n");

	if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
			compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");

	/* free the resources of the pending requests */
	if (compo->mixer[crtc]->pending_event) {
		drm_vblank_put(dev, crtc);
		compo->mixer[crtc]->pending_event = NULL;
	}
}
EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);

static struct drm_crtc_funcs sti_crtc_funcs = {
	.set_config = drm_crtc_helper_set_config,
	.page_flip = sti_drm_crtc_page_flip,
	.destroy = sti_drm_crtc_destroy,
	.set_property = sti_drm_crtc_set_property,
};

bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);

	if (mixer->id == STI_MIXER_MAIN)
		return true;

	return false;
}

int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
		struct drm_plane *primary, struct drm_plane *cursor)
{
	struct drm_crtc *crtc = &mixer->drm_crtc;
	int res;

	res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
			&sti_crtc_funcs);
	if (res) {
		DRM_ERROR("Can not initialze CRTC\n");
		return -EINVAL;
	}

	drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);

	DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
			 crtc->base.id, sti_mixer_to_str(mixer));

	return 0;
}