summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/sti/sti_crtc.c
blob: dc64fbfc4e61b36c70d75a0b3fc242e8f43137bb (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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) STMicroelectronics SA 2014
 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
 *          Fabien Dessenne <fabien.dessenne@st.com>
 *          for STMicroelectronics.
 */

#include <linux/clk.h>

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_device.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>

#include "sti_compositor.h"
#include "sti_crtc.h"
#include "sti_drv.h"
#include "sti_vid.h"
#include "sti_vtg.h"

static void sti_crtc_atomic_enable(struct drm_crtc *crtc,
				   struct drm_crtc_state *old_state)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);

	DRM_DEBUG_DRIVER("\n");

	mixer->status = STI_MIXER_READY;

	drm_crtc_vblank_on(crtc);
}

static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
				    struct drm_crtc_state *old_state)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);

	DRM_DEBUG_DRIVER("\n");

	mixer->status = STI_MIXER_DISABLING;

	drm_crtc_wait_one_vblank(crtc);
}

static int
sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct device *dev = mixer->dev;
	struct sti_compositor *compo = dev_get_drvdata(dev);
	struct clk *compo_clk, *pix_clk;
	int rate = mode->clock * 1000;

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

	DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));

	if (mixer->id == STI_MIXER_MAIN) {
		compo_clk = compo->clk_compo_main;
		pix_clk = compo->clk_pix_main;
	} else {
		compo_clk = compo->clk_compo_aux;
		pix_clk = compo->clk_pix_aux;
	}

	/* Prepare and enable the compo IP clock */
	if (clk_prepare_enable(compo_clk)) {
		DRM_INFO("Failed to prepare/enable compositor clk\n");
		goto compo_error;
	}

	/* Set rate and prepare/enable pixel clock */
	if (clk_set_rate(pix_clk, rate) < 0) {
		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
		goto pix_error;
	}
	if (clk_prepare_enable(pix_clk)) {
		DRM_ERROR("Failed to prepare/enable pix clk\n");
		goto pix_error;
	}

	sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode);

	if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
		DRM_ERROR("Can't set active video area\n");
		goto mixer_error;
	}

	return 0;

mixer_error:
	clk_disable_unprepare(pix_clk);
pix_error:
	clk_disable_unprepare(compo_clk);
compo_error:
	return -EINVAL;
}

static void sti_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);

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

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

	drm_crtc_vblank_off(crtc);

	/* 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);
	}

	mixer->status = STI_MIXER_DISABLED;
}

static void
sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
	sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
}

static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
				  struct drm_crtc_state *old_crtc_state)
{
	struct drm_device *drm_dev = crtc->dev;
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
	struct drm_plane *p;
	struct drm_pending_vblank_event *event;
	unsigned long flags;

	DRM_DEBUG_DRIVER("\n");

	/* perform plane actions */
	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
		struct sti_plane *plane = to_sti_plane(p);

		switch (plane->status) {
		case STI_PLANE_UPDATED:
			/* ignore update for other CRTC */
			if (p->state->crtc != crtc)
				continue;

			/* update planes tag as updated */
			DRM_DEBUG_DRIVER("update plane %s\n",
					 sti_plane_to_str(plane));

			if (sti_mixer_set_plane_depth(mixer, plane)) {
				DRM_ERROR("Cannot set plane %s depth\n",
					  sti_plane_to_str(plane));
				break;
			}

			if (sti_mixer_set_plane_status(mixer, plane, true)) {
				DRM_ERROR("Cannot enable plane %s at mixer\n",
					  sti_plane_to_str(plane));
				break;
			}

			/* if plane is HQVDP_0 then commit the vid[0] */
			if (plane->desc == STI_HQVDP_0)
				sti_vid_commit(compo->vid[0], p->state);

			plane->status = STI_PLANE_READY;

			break;
		case STI_PLANE_DISABLING:
			/* disabling sequence for planes tag as disabling */
			DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
					 sti_plane_to_str(plane));

			if (sti_mixer_set_plane_status(mixer, plane, false)) {
				DRM_ERROR("Cannot disable plane %s at mixer\n",
					  sti_plane_to_str(plane));
				continue;
			}

			if (plane->desc == STI_CURSOR)
				/* tag plane status for disabled */
				plane->status = STI_PLANE_DISABLED;
			else
				/* tag plane status for flushing */
				plane->status = STI_PLANE_FLUSHING;

			/* if plane is HQVDP_0 then disable the vid[0] */
			if (plane->desc == STI_HQVDP_0)
				sti_vid_disable(compo->vid[0]);

			break;
		default:
			/* Other status case are not handled */
			break;
		}
	}

	event = crtc->state->event;
	if (event) {
		crtc->state->event = NULL;

		spin_lock_irqsave(&crtc->dev->event_lock, flags);
		if (drm_crtc_vblank_get(crtc) == 0)
			drm_crtc_arm_vblank_event(crtc, event);
		else
			drm_crtc_send_vblank_event(crtc, event);
		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
	}
}

static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
	.mode_set_nofb = sti_crtc_mode_set_nofb,
	.atomic_flush = sti_crtc_atomic_flush,
	.atomic_enable = sti_crtc_atomic_enable,
	.atomic_disable = sti_crtc_atomic_disable,
};

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

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

int sti_crtc_vblank_cb(struct notifier_block *nb,
		       unsigned long event, void *data)
{
	struct sti_compositor *compo;
	struct drm_crtc *crtc = data;
	struct sti_mixer *mixer;
	unsigned int pipe;

	pipe = drm_crtc_index(crtc);
	compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
	mixer = compo->mixer[pipe];

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

	drm_crtc_handle_vblank(crtc);

	if (mixer->status == STI_MIXER_DISABLING) {
		struct drm_plane *p;

		/* Disable mixer only if all overlay planes (GDP and VDP)
		 * are disabled */
		list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
				    head) {
			struct sti_plane *plane = to_sti_plane(p);

			if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
				if (plane->status != STI_PLANE_DISABLED)
					return 0;
		}
		sti_crtc_disable(crtc);
	}

	return 0;
}

int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
	struct sti_private *dev_priv = dev->dev_private;
	struct sti_compositor *compo = dev_priv->compo;
	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
	struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
	struct sti_vtg *vtg = compo->vtg[pipe];

	DRM_DEBUG_DRIVER("\n");

	if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) {
		DRM_ERROR("Cannot register VTG notifier\n");
		return -EINVAL;
	}

	return 0;
}

void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
{
	struct sti_private *priv = drm_dev->dev_private;
	struct sti_compositor *compo = priv->compo;
	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
	struct sti_vtg *vtg = compo->vtg[pipe];

	DRM_DEBUG_DRIVER("\n");

	if (sti_vtg_unregister_client(vtg, vtg_vblank_nb))
		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
}

static int sti_crtc_late_register(struct drm_crtc *crtc)
{
	struct sti_mixer *mixer = to_sti_mixer(crtc);
	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);

	if (drm_crtc_index(crtc) == 0)
		return sti_compositor_debugfs_init(compo, crtc->dev->primary);

	return 0;
}

static const struct drm_crtc_funcs sti_crtc_funcs = {
	.set_config = drm_atomic_helper_set_config,
	.page_flip = drm_atomic_helper_page_flip,
	.destroy = sti_crtc_destroy,
	.set_property = sti_crtc_set_property,
	.reset = drm_atomic_helper_crtc_reset,
	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
	.late_register = sti_crtc_late_register,
};

bool sti_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_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, NULL);
	if (res) {
		DRM_ERROR("Can't initialize 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;
}