1 /**************************************************************************
5 * Copyright 2015 Samsung Electronics co., Ltd. All Rights Reserved.
7 * Contact: Eunchul Kim <chulspro.kim@samsung.com>,
8 * JinYoung Jeon <jy0.jeon@samsung.com>,
9 * Taeheon Kim <th908.kim@samsung.com>,
10 * YoungJun Cho <yj44.cho@samsung.com>,
11 * SooChan Lim <sc1.lim@samsung.com>,
12 * Boram Park <sc1.lim@samsung.com>
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the
16 * "Software"), to deal in the Software without restriction, including
17 * without limitation the rights to use, copy, modify, merge, publish,
18 * distribute, sub license, and/or sell copies of the Software, and to
19 * permit persons to whom the Software is furnished to do so, subject to
20 * the following conditions:
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
27 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
29 * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
30 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
31 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
32 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 **************************************************************************/
41 #include "tdm_private.h"
45 * tdm vblank doesn't care about thread things.
46 * However, to use tdm_event_loop_xxx functions, have to use the internal function.
47 * So need to lock/unlock the mutex of private_display.
51 * - aligned by HW vblank
52 * - use a tdm_event_loop_source object only.
55 #define TDM_VBLANK_UINT_MAX 4294967295U
56 #define TDM_VBLANK_UINT_1Q 1073741823U /* UINT_MAX / 4 */
57 #define TDM_VBLANK_UINT_3Q 3221225471U /* UINT_MAX / 4 * 3 */
59 /* (seq < TDM_VBLANK_UINT_1Q && TDM_VBLANK_UINT_3Q < last_seq) means
60 * that the sequence value has reached the max value and started from 0 again.
62 #define TDM_VBLANK_SEQ_REACHED_MAX(seq, last_seq) \
63 ((seq) < TDM_VBLANK_UINT_1Q && TDM_VBLANK_UINT_3Q < (last_seq))
65 #define VER(fmt, arg...) TDM_ERR("[%p] "fmt, private_vblank, ##arg)
66 #define VWR(fmt, arg...) TDM_WRN("[%p] "fmt, private_vblank, ##arg)
67 #define VIN(fmt, arg...) TDM_INFO("[%p] "fmt, private_vblank, ##arg)
68 #define VDB(fmt, arg...) TDM_DBG("[%p] "fmt, private_vblank, ##arg)
75 } tdm_vblank_wait_type;
77 typedef struct _tdm_vblank_wait_info tdm_vblank_wait_info;
79 typedef struct _tdm_private_vblank {
80 struct list_head link;
85 unsigned int vrefresh;
87 unsigned int check_HW_or_SW;
90 unsigned int enable_fake;
93 unsigned int quotient;
95 unsigned int last_seq;
96 unsigned int last_tv_sec;
97 unsigned int last_tv_usec;
100 double HW_vblank_gap;
101 struct list_head HW_wait_list;
104 tdm_event_loop_source *SW_timer;
105 struct list_head SW_wait_list;
106 } tdm_private_vblank;
108 struct _tdm_vblank_wait_info {
109 struct list_head link;
110 struct list_head valid_link;
114 unsigned int req_sec;
115 unsigned int req_usec;
116 unsigned int interval;
118 tdm_vblank_handler func;
120 tdm_private_vblank *private_vblank;
122 tdm_vblank_wait_type type;
124 unsigned int target_sec;
125 unsigned int target_usec;
126 unsigned int target_seq;
129 static struct list_head vblank_list;
130 static struct list_head valid_wait_list;
131 static unsigned int vblank_list_inited;
132 static unsigned int stamp = 0;
134 static tdm_error _tdm_vblank_cb_vblank_SW(void *user_data);
135 static tdm_error _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info);
139 _print_list(struct list_head *list)
141 tdm_vblank_wait_info *w = NULL;
143 LIST_FOR_EACH_ENTRY(w, list, link) {
144 printf(" %d", w->interval);
150 static inline unsigned int
151 _tdm_vblank_check_valid(tdm_vblank_wait_info *wait_info)
153 tdm_vblank_wait_info *w = NULL;
158 LIST_FOR_EACH_ENTRY(w, &valid_wait_list, valid_link) {
159 if (w->stamp == wait_info->stamp)
166 static inline unsigned int
167 _tdm_vblank_find_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
169 tdm_vblank_wait_info *w = NULL;
174 LIST_FOR_EACH_ENTRY(w, list, link) {
175 if (w->stamp == wait_info->stamp)
183 _tdm_vblank_insert_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
185 tdm_vblank_wait_info *w = NULL;
186 tdm_vblank_wait_info *found = NULL;
188 if (LIST_IS_EMPTY(list)) {
189 LIST_ADDTAIL(&wait_info->link, list);
193 LIST_FOR_EACH_ENTRY(w, list, link) {
194 if (wait_info->type == VBLANK_TYPE_SW) {
195 if (wait_info->target_sec == 0)
196 TDM_NEVER_GET_HERE();
197 if (w->target_sec < wait_info->target_sec) {
201 if (w->target_sec == wait_info->target_sec && w->target_usec <= wait_info->target_usec) {
206 if (w->interval <= wait_info->interval) {
214 LIST_ADD(&wait_info->link, &found->link);
216 LIST_ADDTAIL(&wait_info->link, list->next);
220 _tdm_vblank_change_to_SW(tdm_private_vblank *private_vblank)
222 tdm_vblank_wait_info *w = NULL, *ww = NULL;
224 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
226 w->type = VBLANK_TYPE_SW_FAKE;
227 _tdm_vblank_wait_SW(w);
232 _tdm_vblank_free_HW_wait(tdm_private_vblank *private_vblank, tdm_error error, unsigned int call_cb)
234 tdm_vblank_wait_info *w = NULL, *ww = NULL;
236 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
238 LIST_DEL(&w->valid_link);
240 if (call_cb && w->func)
241 w->func(private_vblank, error, 0, 0, 0, w->user_data);
248 _tdm_vblank_cb_output_change(tdm_output *output, tdm_output_change_type type,
249 tdm_value value, void *user_data)
251 tdm_private_vblank *private_vblank = user_data;
253 TDM_RETURN_IF_FAIL(private_vblank != NULL);
256 case TDM_OUTPUT_CHANGE_DPMS:
257 if (private_vblank->dpms == value.u32)
259 VIN("dpms %s", tdm_dpms_str(value.u32));
260 private_vblank->dpms = value.u32;
261 private_vblank->check_HW_or_SW = 1;
262 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON) {
263 if (private_vblank->enable_fake)
264 _tdm_vblank_change_to_SW(private_vblank);
266 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_DPMS_OFF, 1);
269 case TDM_OUTPUT_CHANGE_CONNECTION:
270 VIN("output %s", tdm_status_str(value.u32));
271 if (value.u32 == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)
272 _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
280 tdm_vblank_create(tdm_display *dpy, tdm_output *output, tdm_error *error)
282 tdm_private_vblank *private_vblank;
283 const tdm_output_mode *mode = NULL;
284 tdm_output_dpms dpms = TDM_OUTPUT_DPMS_ON;
287 TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(dpy != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
288 TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
291 *error = TDM_ERROR_NONE;
293 if (!vblank_list_inited) {
294 LIST_INITHEAD(&vblank_list);
295 LIST_INITHEAD(&valid_wait_list);
296 vblank_list_inited = 1;
299 tdm_output_get_mode(output, &mode);
302 *error = TDM_ERROR_OPERATION_FAILED;
307 tdm_output_get_dpms(output, &dpms);
309 private_vblank = calloc(1, sizeof *private_vblank);
310 if (!private_vblank) {
312 *error = TDM_ERROR_OUT_OF_MEMORY;
317 tdm_output_add_change_handler(output, _tdm_vblank_cb_output_change, private_vblank);
319 private_vblank->dpy = dpy;
320 private_vblank->output = output;
321 private_vblank->dpms = dpms;
322 private_vblank->vrefresh = mode->vrefresh;
323 private_vblank->HW_vblank_gap = (double)1000000 / private_vblank->vrefresh;
325 private_vblank->check_HW_or_SW = 1;
326 private_vblank->fps = mode->vrefresh;
328 LIST_INITHEAD(&private_vblank->HW_wait_list);
329 LIST_INITHEAD(&private_vblank->SW_wait_list);
331 LIST_ADD(&private_vblank->link, &vblank_list);
333 if (tdm_debug_module & TDM_DEBUG_VBLANK)
334 VIN("created. vrefresh(%d) dpms(%d)",
335 private_vblank->vrefresh, private_vblank->dpms);
337 return (tdm_vblank*)private_vblank;
341 tdm_vblank_destroy(tdm_vblank *vblank)
343 tdm_private_vblank *private_vblank = vblank;
344 tdm_vblank_wait_info *w = NULL, *ww = NULL;
349 LIST_DEL(&private_vblank->link);
351 if (private_vblank->SW_timer) {
352 tdm_display_lock(private_vblank->dpy);
353 tdm_event_loop_source_remove(private_vblank->SW_timer);
354 tdm_display_unlock(private_vblank->dpy);
357 tdm_output_remove_change_handler(private_vblank->output,
358 _tdm_vblank_cb_output_change, private_vblank);
360 _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
362 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
364 LIST_DEL(&w->valid_link);
368 if (tdm_debug_module & TDM_DEBUG_VBLANK)
371 free(private_vblank);
375 tdm_vblank_set_fps(tdm_vblank *vblank, unsigned int fps)
377 tdm_private_vblank *private_vblank = vblank;
379 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
380 TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
382 if (private_vblank->fps == fps)
383 return TDM_ERROR_NONE;
385 private_vblank->fps = fps;
386 private_vblank->check_HW_or_SW = 1;
388 if (tdm_debug_module & TDM_DEBUG_VBLANK)
389 VIN("fps(%d)", private_vblank->fps);
391 return TDM_ERROR_NONE;
395 tdm_vblank_set_offset(tdm_vblank *vblank, int offset)
397 tdm_private_vblank *private_vblank = vblank;
399 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
401 if (private_vblank->offset == offset)
402 return TDM_ERROR_NONE;
404 private_vblank->offset = offset;
405 private_vblank->check_HW_or_SW = 1;
407 if (tdm_debug_module & TDM_DEBUG_VBLANK)
408 VIN("offset(%d)", private_vblank->offset);
410 return TDM_ERROR_NONE;
414 tdm_vblank_set_enable_fake(tdm_vblank *vblank, unsigned int enable_fake)
416 tdm_private_vblank *private_vblank = vblank;
418 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
420 if (private_vblank->enable_fake == enable_fake)
421 return TDM_ERROR_NONE;
423 private_vblank->enable_fake = enable_fake;
425 if (tdm_debug_module & TDM_DEBUG_VBLANK)
426 VIN("enable_fake(%d)", private_vblank->enable_fake);
428 return TDM_ERROR_NONE;
432 tdm_vblank_get_enable_fake(tdm_vblank *vblank)
434 tdm_private_vblank *private_vblank = vblank;
436 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, 0);
438 return private_vblank->enable_fake;
442 _tdm_vblank_sw_timer_update(tdm_private_vblank *private_vblank)
444 tdm_vblank_wait_info *first_wait_info = NULL;
445 unsigned long curr, target;
449 if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
451 return TDM_ERROR_OPERATION_FAILED;
454 first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
455 curr = tdm_helper_get_time_in_micros();
456 target = first_wait_info->target_sec * 1000000 + first_wait_info->target_usec;
458 /* ms_delay should be more that 1 */
462 ms_delay = ceil((double)(target - curr) / 1000);
467 if (tdm_debug_module & TDM_DEBUG_VBLANK)
468 VIN("wait(%p) curr(%4lu) target(%4lu) ms_delay(%d)",
469 first_wait_info, curr, target, ms_delay);
471 tdm_display_lock(private_vblank->dpy);
473 if (!private_vblank->SW_timer) {
474 private_vblank->SW_timer =
475 tdm_event_loop_add_timer_handler(private_vblank->dpy,
476 _tdm_vblank_cb_vblank_SW,
479 if (!private_vblank->SW_timer) {
480 tdm_display_unlock(private_vblank->dpy);
481 VER("couldn't add timer");
484 VIN("Use SW vblank");
487 ret = tdm_event_loop_source_timer_update(private_vblank->SW_timer, ms_delay);
488 if (ret != TDM_ERROR_NONE) {
489 tdm_display_unlock(private_vblank->dpy);
490 VER("couldn't update timer");
494 tdm_display_unlock(private_vblank->dpy);
496 return TDM_ERROR_NONE;
500 _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
501 unsigned int tv_sec, unsigned int tv_usec,
504 tdm_vblank_wait_info *wait_info = user_data;
505 tdm_private_vblank *private_vblank;
507 if (!_tdm_vblank_check_valid(wait_info)) {
508 TDM_DBG("can't find wait(%p) from valid_wait_list", wait_info);
512 private_vblank = wait_info->private_vblank;
513 TDM_RETURN_IF_FAIL(private_vblank != NULL);
515 if (!_tdm_vblank_find_wait(wait_info, &private_vblank->HW_wait_list)) {
516 VDB("can't find wait(%p)", wait_info);
520 if (wait_info->type == VBLANK_TYPE_HW_SW) {
521 unsigned long target;
524 LIST_DEL(&wait_info->link);
526 target = (unsigned long)tv_sec * 1000000 + tv_usec;
527 target += (private_vblank->offset * 1000);
529 wait_info->target_sec = target / 1000000;
530 wait_info->target_usec = target % 1000000;
532 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
534 ret = _tdm_vblank_sw_timer_update(private_vblank);
536 /* wait_info will be freed in _tdm_vblank_cb_vblank_SW() */
537 if (ret == TDM_ERROR_NONE) {
538 if (tdm_debug_module & TDM_DEBUG_VBLANK)
539 VIN("wait(%p) SW timer", wait_info);
543 VWR("couldn't update sw timer");
546 if (tdm_debug_module & TDM_DEBUG_VBLANK)
547 VIN("wait(%p) sequence(%u) done", wait_info, wait_info->target_seq);
549 private_vblank->last_seq = wait_info->target_seq;
550 private_vblank->last_tv_sec = tv_sec;
551 private_vblank->last_tv_usec = tv_usec;
554 wait_info->func(private_vblank, TDM_ERROR_NONE, wait_info->target_seq,
555 tv_sec, tv_usec, wait_info->user_data);
557 LIST_DEL(&wait_info->link);
558 LIST_DEL(&wait_info->valid_link);
563 _tdm_vblank_wait_HW(tdm_vblank_wait_info *wait_info)
565 tdm_private_vblank *private_vblank = wait_info->private_vblank;
569 _tdm_vblank_insert_wait(wait_info, &private_vblank->HW_wait_list);
571 hw_interval = wait_info->interval * private_vblank->quotient;
573 if (private_vblank->last_tv_sec == 0)
574 wait_info->target_seq = 1;
576 unsigned long last, prev, req, curr, target;
577 unsigned int skip = 0;
579 last = (unsigned long)private_vblank->last_tv_sec * 1000000 + private_vblank->last_tv_usec;
580 req = (unsigned long)wait_info->req_sec * 1000000 + wait_info->req_usec;
582 skip = (unsigned int)((req - last) / private_vblank->vblank_gap);
583 prev = last + skip * private_vblank->vblank_gap;
585 curr = tdm_helper_get_time_in_micros();
587 while (target < curr)
588 target += private_vblank->vblank_gap;
590 hw_interval = (unsigned int)((target - curr) / private_vblank->HW_vblank_gap) + 1;
592 wait_info->target_seq = private_vblank->last_seq;
593 wait_info->target_seq += (target - last) / (unsigned long)private_vblank->vblank_gap;
595 if (tdm_debug_module & TDM_DEBUG_VBLANK)
596 VIN("wait(%p) last(%4lu) req(%4lu) prev(%4lu) curr(%4lu) skip(%d) hw_interval(%d)",
597 wait_info, last, req - last, prev - last, curr - last,
601 ret = tdm_output_wait_vblank(private_vblank->output, hw_interval, 0,
602 _tdm_vblank_cb_vblank_HW, wait_info);
604 if (ret != TDM_ERROR_NONE) {
605 LIST_DEL(&wait_info->link);
609 if (tdm_debug_module & TDM_DEBUG_VBLANK)
610 VIN("wait(%p) waiting", wait_info);
612 return TDM_ERROR_NONE;
616 _tdm_vblank_cb_vblank_SW(void *user_data)
618 tdm_private_vblank *private_vblank = user_data;
619 tdm_vblank_wait_info *first_wait_info = NULL, *w = NULL, *ww = NULL;
621 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_OPERATION_FAILED);
623 if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
625 return TDM_ERROR_OPERATION_FAILED;
628 first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
629 TDM_RETURN_VAL_IF_FAIL(first_wait_info != NULL, TDM_ERROR_OPERATION_FAILED);
631 if (tdm_debug_module & TDM_DEBUG_VBLANK)
632 VIN("wait(%p) sequence(%u) done", first_wait_info, first_wait_info->target_seq);
634 private_vblank->last_seq = first_wait_info->target_seq;
635 private_vblank->last_tv_sec = first_wait_info->target_sec;
636 private_vblank->last_tv_usec = first_wait_info->target_usec;
638 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
639 if (w->target_sec != first_wait_info->target_sec ||
640 w->target_usec != first_wait_info->target_usec)
644 LIST_DEL(&w->valid_link);
647 w->func(private_vblank, TDM_ERROR_NONE, w->target_seq,
648 w->target_sec, w->target_usec,
654 return TDM_ERROR_NONE;
658 _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info)
660 tdm_private_vblank *private_vblank = wait_info->private_vblank;
663 if (private_vblank->last_tv_sec == 0) {
664 unsigned long curr = tdm_helper_get_time_in_micros();
666 /* SW vblank starts from now. SW vblank doesn't need to be aligned with HW vblank. */
667 private_vblank->last_seq = 0;
668 private_vblank->last_tv_sec = curr / 1000000;
669 private_vblank->last_tv_usec = curr % 1000000;
671 /* +1 ms to call the handler ASAP at the first. no matter for SW timer. */
674 wait_info->target_seq = 1;
675 wait_info->target_sec = curr / 1000000;
676 wait_info->target_usec = curr % 1000000;
678 unsigned long last, prev, req, curr, target;
681 last = (unsigned long)private_vblank->last_tv_sec * 1000000 + private_vblank->last_tv_usec;
682 req = (unsigned long)wait_info->req_sec * 1000000 + wait_info->req_usec;
684 skip = (unsigned int)((req - last) / private_vblank->vblank_gap);
685 prev = last + skip * private_vblank->vblank_gap;
687 curr = tdm_helper_get_time_in_micros();
688 target = prev + (unsigned long)(private_vblank->vblank_gap * wait_info->interval);
690 while (target < curr)
691 target += (unsigned long)private_vblank->vblank_gap;
693 wait_info->target_seq = private_vblank->last_seq;
694 wait_info->target_seq += (target - last) / (unsigned long)private_vblank->vblank_gap;
696 wait_info->target_sec = target / 1000000;
697 wait_info->target_usec = target % 1000000;
699 if (tdm_debug_module & TDM_DEBUG_VBLANK)
700 VIN("wait(%p) last(%4lu) req(%4lu) prev(%4lu) curr(%4lu) target(%4lu,%4lu)",
701 wait_info, last, req - last, prev - last, curr - last,
702 target, target - last);
705 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
707 ret = _tdm_vblank_sw_timer_update(private_vblank);
708 if (ret != TDM_ERROR_NONE) {
709 LIST_DEL(&wait_info->link);
710 VER("couldn't update sw timer");
714 return TDM_ERROR_NONE;
718 tdm_vblank_wait(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
719 unsigned int interval, tdm_vblank_handler func, void *user_data)
721 tdm_private_vblank *private_vblank = vblank;
722 tdm_vblank_wait_info *wait_info;
725 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
726 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
728 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON && !private_vblank->enable_fake) {
729 VIN("can't wait a vblank because of DPMS off");
730 return TDM_ERROR_DPMS_OFF;
733 wait_info = calloc(1, sizeof *wait_info);
736 return TDM_ERROR_OUT_OF_MEMORY;
739 /* set request time to current time if 0. This function seems to be called in server side. */
740 if (req_sec == 0 && req_usec == 0) {
741 unsigned long curr = tdm_helper_get_time_in_micros();
742 req_sec = curr / 1000000;
743 req_usec = curr % 1000000;
746 LIST_INITHEAD(&wait_info->link);
747 LIST_ADDTAIL(&wait_info->valid_link, &valid_wait_list);
748 wait_info->stamp = ++stamp;
749 wait_info->req_sec = req_sec;
750 wait_info->req_usec = req_usec;
751 wait_info->interval = interval;
752 wait_info->func = func;
753 wait_info->user_data = user_data;
754 wait_info->private_vblank = private_vblank;
756 if (private_vblank->check_HW_or_SW) {
757 private_vblank->check_HW_or_SW = 0;
758 private_vblank->vblank_gap = (double)1000000 / private_vblank->fps;
759 private_vblank->quotient = private_vblank->vrefresh / private_vblank->fps;
762 /* 1) if fps != factor of vrefresh, SW timer
763 * 2) if fps == factor of vrefresh && dpms == off, SW timer (Fake HW vblank)
764 * 2) if fps == factor of vrefresh && dpms == on && offset == 0, HW vblank
765 * 3) if fps == factor of vrefresh && dpms == on && offset != 0, HW vblank + SW timer
766 * In case of 1), we really don't need to align with HW vblank.
768 if (private_vblank->vrefresh % private_vblank->fps)
769 wait_info->type = VBLANK_TYPE_SW;
770 else if (private_vblank->dpms == TDM_OUTPUT_DPMS_OFF)
771 wait_info->type = VBLANK_TYPE_SW_FAKE;
772 else if (private_vblank->offset == 0)
773 wait_info->type = VBLANK_TYPE_HW;
775 wait_info->type = VBLANK_TYPE_HW_SW;
777 if (wait_info->type == VBLANK_TYPE_SW || wait_info->type == VBLANK_TYPE_SW_FAKE)
778 ret = _tdm_vblank_wait_SW(wait_info);
780 ret = _tdm_vblank_wait_HW(wait_info);
781 if (ret == TDM_ERROR_DPMS_OFF)
782 ret = _tdm_vblank_wait_SW(wait_info);
785 if (ret != TDM_ERROR_NONE) {
786 LIST_DEL(&wait_info->link);
787 LIST_DEL(&wait_info->valid_link);
792 return TDM_ERROR_NONE;
796 tdm_vblank_wait_seq(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
797 unsigned int sequence, tdm_vblank_handler func, void *user_data)
799 tdm_private_vblank *private_vblank = vblank;
800 unsigned int interval;
802 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
803 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
805 /* if the sequence of vblank reaches the max value, sequence can be 0. */
807 if (private_vblank->last_seq == 0) {
808 TDM_WRN("can't calculate interval with sequence(%u)", sequence);
810 } else if (sequence > private_vblank->last_seq ||
811 TDM_VBLANK_SEQ_REACHED_MAX(sequence, private_vblank->last_seq)) {
812 unsigned long last, curr, seq_target;
814 last = (unsigned long)private_vblank->last_tv_sec * 1000000 + private_vblank->last_tv_usec;
815 curr = tdm_helper_get_time_in_micros();
816 seq_target = last + (unsigned long)(private_vblank->vblank_gap * (sequence - private_vblank->last_seq));
818 /* If target is old or too close(1ms) to current, we call the handler immediately.
819 * 2ms? it seems too much.
821 if (seq_target < curr) {
822 func(vblank, TDM_ERROR_NONE, sequence,
823 seq_target / 1000000, seq_target % 1000000,
825 return TDM_ERROR_NONE;
826 } else if ((seq_target - curr) < 1000) { /* 1ms */
827 func(vblank, TDM_ERROR_NONE, sequence,
828 curr / 1000000, curr % 1000000,
830 return TDM_ERROR_NONE;
833 interval = ((seq_target - curr) / (unsigned long)private_vblank->vblank_gap) + 1;
835 /* this seems error. But we handle this like normal to avoid the unexpected error in cliend side */
836 TDM_WRN("sequence(%u) should be over the last sequence(%u)", sequence, private_vblank->last_seq);
837 func(vblank, TDM_ERROR_NONE, private_vblank->last_seq,
838 private_vblank->last_tv_sec, private_vblank->last_tv_usec,
840 return TDM_ERROR_NONE;
843 return tdm_vblank_wait(vblank, req_sec, req_usec, interval, func, user_data);