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 VER(fmt,arg...) TDM_ERR("[%p] "fmt, private_vblank, ##arg)
56 #define VWR(fmt,arg...) TDM_WRN("[%p] "fmt, private_vblank, ##arg)
57 #define VIN(fmt,arg...) TDM_INFO("[%p] "fmt, private_vblank, ##arg)
58 #define VDB(fmt,arg...) TDM_DBG("[%p] "fmt, private_vblank, ##arg)
60 typedef struct _tdm_vblank_wait_info tdm_vblank_wait_info;
62 typedef struct _tdm_private_vblank {
63 struct list_head link;
68 unsigned int vrefresh;
70 unsigned int check_HW_or_SW;
73 unsigned int enable_fake;
76 unsigned int last_seq;
77 unsigned int last_tv_sec;
78 unsigned int last_tv_usec;
82 unsigned int HW_enable;
83 unsigned int HW_quotient;
84 struct list_head HW_wait_list;
87 tdm_event_loop_source *SW_timer;
88 struct list_head SW_pending_wait_list;
89 struct list_head SW_wait_list;
91 tdm_vblank_wait_info *SW_align_wait;
92 double SW_align_offset;
93 unsigned int SW_align_sec;
94 unsigned int SW_align_usec;
98 struct _tdm_vblank_wait_info {
99 struct list_head link;
100 struct list_head valid_link;
104 unsigned int req_sec;
105 unsigned int req_usec;
106 unsigned int interval;
108 tdm_vblank_handler func;
110 tdm_private_vblank *private_vblank;
112 /* target_sec can be 0 when last_tv_sec is 0 because we can't calculate
113 * target_sec without last_tv_sec. So we have to call tdm_output_wait_vblank
114 * to fill last_tv_sec at the first time.
116 unsigned int target_sec;
117 unsigned int target_usec;
118 unsigned int target_seq;
119 int target_hw_interval;
122 static struct list_head vblank_list;
123 static struct list_head valid_wait_list;
124 static unsigned int vblank_list_inited;
125 static unsigned int stamp = 0;
127 static tdm_error _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info);
129 static void _tdm_vblank_sw_timer_align(tdm_private_vblank *private_vblank);
134 _print_list(struct list_head *list)
136 tdm_vblank_wait_info *w = NULL;
138 LIST_FOR_EACH_ENTRY(w, list, link) {
139 printf(" %d", w->interval);
145 static inline unsigned int
146 _tdm_vblank_check_valid(tdm_vblank_wait_info *wait_info)
148 tdm_vblank_wait_info *w = NULL;
153 LIST_FOR_EACH_ENTRY(w, &valid_wait_list, valid_link) {
154 if (w->stamp == wait_info->stamp)
161 static inline unsigned int
162 _tdm_vblank_find_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
164 tdm_vblank_wait_info *w = NULL;
169 LIST_FOR_EACH_ENTRY(w, list, link) {
170 if (w->stamp == wait_info->stamp)
178 _tdm_vblank_insert_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
180 tdm_vblank_wait_info *w = NULL;
181 tdm_vblank_wait_info *found = NULL;
183 if (LIST_IS_EMPTY(list)) {
184 LIST_ADDTAIL(&wait_info->link, list);
188 LIST_FOR_EACH_ENTRY(w, list, link) {
189 /* If last_tv_sec == 0, we can't calculate target_sec. */
190 if (wait_info->target_sec == 0) {
191 if (w->interval <= wait_info->interval) {
196 if (w->target_sec < wait_info->target_sec) {
200 if (w->target_sec == wait_info->target_sec && w->target_usec <= wait_info->target_usec) {
208 LIST_ADD(&wait_info->link, &found->link);
210 LIST_ADDTAIL(&wait_info->link, list->next);
214 _tdm_vblank_change_to_SW(tdm_private_vblank *private_vblank)
216 tdm_vblank_wait_info *w = NULL, *ww = NULL;
220 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
222 _tdm_vblank_wait_SW(w);
227 _tdm_vblank_free_HW_wait(tdm_private_vblank *private_vblank, tdm_error error, unsigned int call_cb)
229 tdm_vblank_wait_info *w = NULL, *ww = NULL;
231 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
233 LIST_DEL(&w->valid_link);
235 if (call_cb && w->func)
236 w->func(private_vblank, error, 0, 0, 0, w->user_data);
243 _tdm_vblank_cb_output_change(tdm_output *output, tdm_output_change_type type,
244 tdm_value value, void *user_data)
246 tdm_private_vblank *private_vblank = user_data;
248 TDM_RETURN_IF_FAIL(private_vblank != NULL);
251 case TDM_OUTPUT_CHANGE_DPMS:
252 if (private_vblank->dpms == value.u32)
254 VIN("dpms %s", tdm_dpms_str(value.u32));
255 private_vblank->dpms = value.u32;
256 private_vblank->check_HW_or_SW = 1;
257 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON) {
259 if (private_vblank->SW_align_wait) {
260 LIST_DEL(&private_vblank->SW_align_wait->valid_link);
261 free(private_vblank->SW_align_wait);
262 private_vblank->SW_align_wait = NULL;
266 if (private_vblank->enable_fake)
267 _tdm_vblank_change_to_SW(private_vblank);
269 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_DPMS_OFF, 1);
272 case TDM_OUTPUT_CHANGE_CONNECTION:
273 VIN("output %s", tdm_status_str(value.u32));
274 if (value.u32 == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)
275 _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
283 tdm_vblank_create(tdm_display *dpy, tdm_output *output, tdm_error *error)
285 tdm_private_vblank *private_vblank;
286 const tdm_output_mode *mode = NULL;
287 tdm_output_dpms dpms = TDM_OUTPUT_DPMS_ON;
290 TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(dpy != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
291 TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
294 *error = TDM_ERROR_NONE;
296 if (!vblank_list_inited) {
297 LIST_INITHEAD(&vblank_list);
298 LIST_INITHEAD(&valid_wait_list);
299 vblank_list_inited = 1;
302 tdm_output_get_mode(output, &mode);
305 *error = TDM_ERROR_OPERATION_FAILED;
310 tdm_output_get_dpms(output, &dpms);
312 private_vblank = calloc(1, sizeof *private_vblank);
313 if (!private_vblank) {
315 *error = TDM_ERROR_OUT_OF_MEMORY;
320 tdm_output_add_change_handler(output, _tdm_vblank_cb_output_change, private_vblank);
322 private_vblank->dpy = dpy;
323 private_vblank->output = output;
324 private_vblank->dpms = dpms;
325 private_vblank->vrefresh = mode->vrefresh;
326 private_vblank->HW_vblank_gap = (double)1000000 / private_vblank->vrefresh;
328 private_vblank->check_HW_or_SW = 1;
329 private_vblank->fps = mode->vrefresh;
331 LIST_INITHEAD(&private_vblank->HW_wait_list);
333 LIST_INITHEAD(&private_vblank->SW_pending_wait_list);
334 LIST_INITHEAD(&private_vblank->SW_wait_list);
336 LIST_ADD(&private_vblank->link, &vblank_list);
338 VDB("created. vrefresh(%d) dpms(%d)",
339 private_vblank->vrefresh, private_vblank->dpms);
341 return (tdm_vblank*)private_vblank;
345 tdm_vblank_destroy(tdm_vblank *vblank)
347 tdm_private_vblank *private_vblank = vblank;
348 tdm_vblank_wait_info *w = NULL, *ww = NULL;
353 LIST_DEL(&private_vblank->link);
356 if (private_vblank->SW_align_wait) {
357 LIST_DEL(&private_vblank->SW_align_wait->valid_link);
358 free(private_vblank->SW_align_wait);
362 if (private_vblank->SW_timer) {
363 tdm_display_lock(private_vblank->dpy);
364 tdm_event_loop_source_remove(private_vblank->SW_timer);
365 tdm_display_unlock(private_vblank->dpy);
368 tdm_output_remove_change_handler(private_vblank->output,
369 _tdm_vblank_cb_output_change, private_vblank);
371 _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
373 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_pending_wait_list, link) {
375 LIST_DEL(&w->valid_link);
379 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
381 LIST_DEL(&w->valid_link);
387 free(private_vblank);
391 tdm_vblank_set_fps(tdm_vblank *vblank, unsigned int fps)
393 tdm_private_vblank *private_vblank = vblank;
395 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
396 TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
398 if (private_vblank->fps == fps)
399 return TDM_ERROR_NONE;
401 private_vblank->fps = fps;
402 private_vblank->check_HW_or_SW = 1;
404 VDB("fps(%d)", private_vblank->fps);
406 return TDM_ERROR_NONE;
410 tdm_vblank_set_offset(tdm_vblank *vblank, int offset)
412 tdm_private_vblank *private_vblank = vblank;
414 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
416 if (private_vblank->offset == offset)
417 return TDM_ERROR_NONE;
419 private_vblank->offset = offset;
420 private_vblank->check_HW_or_SW = 1;
422 VDB("offset(%d)", private_vblank->offset);
424 return TDM_ERROR_NONE;
428 tdm_vblank_set_enable_fake(tdm_vblank *vblank, unsigned int enable_fake)
430 tdm_private_vblank *private_vblank = vblank;
432 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
434 if (private_vblank->enable_fake == enable_fake)
435 return TDM_ERROR_NONE;
437 private_vblank->enable_fake = enable_fake;
439 VDB("enable_fake(%d)", private_vblank->enable_fake);
441 return TDM_ERROR_NONE;
445 _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
446 unsigned int tv_sec, unsigned int tv_usec,
449 tdm_vblank_wait_info *wait_info = user_data;
450 tdm_private_vblank *private_vblank;
452 if (!_tdm_vblank_check_valid(wait_info)) {
453 TDM_DBG("can't find wait(%p) from valid_wait_list", wait_info);
457 private_vblank = wait_info->private_vblank;
458 TDM_RETURN_IF_FAIL(private_vblank != NULL);
460 if (!_tdm_vblank_find_wait(wait_info, &private_vblank->HW_wait_list)) {
461 VDB("can't find wait(%p)", wait_info);
465 LIST_DEL(&wait_info->link);
466 LIST_DEL(&wait_info->valid_link);
468 private_vblank->last_seq = wait_info->target_seq;
469 private_vblank->last_tv_sec = tv_sec;
470 private_vblank->last_tv_usec = tv_usec;
473 wait_info->func(private_vblank, TDM_ERROR_NONE, private_vblank->last_seq,
474 tv_sec, tv_usec, wait_info->user_data);
476 VDB("wait(%p) done", wait_info);
482 _tdm_vblank_wait_HW(tdm_vblank_wait_info *wait_info)
484 tdm_private_vblank *private_vblank = wait_info->private_vblank;
487 TDM_RETURN_VAL_IF_FAIL(wait_info->target_hw_interval > 0, TDM_ERROR_OPERATION_FAILED);
489 _tdm_vblank_insert_wait(wait_info, &private_vblank->HW_wait_list);
491 ret = tdm_output_wait_vblank(private_vblank->output, wait_info->target_hw_interval, 0,
492 _tdm_vblank_cb_vblank_HW, wait_info);
494 if (ret != TDM_ERROR_NONE) {
495 VWR("wait(%p) failed", wait_info);
496 LIST_DEL(&wait_info->link);
500 VDB("wait(%p) waiting", wait_info);
502 return TDM_ERROR_NONE;
506 _tdm_vblank_cb_vblank_SW(void *user_data)
508 tdm_private_vblank *private_vblank = user_data;
509 tdm_vblank_wait_info *first_wait_info = NULL, *w = NULL, *ww = NULL;
511 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_OPERATION_FAILED);
513 if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
515 return TDM_ERROR_OPERATION_FAILED;
518 first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
519 TDM_RETURN_VAL_IF_FAIL(first_wait_info != NULL, TDM_ERROR_OPERATION_FAILED);
521 VDB("wait(%p) done", first_wait_info);
523 private_vblank->last_seq = first_wait_info->target_seq;
524 private_vblank->last_tv_sec = first_wait_info->target_sec;
525 private_vblank->last_tv_usec = first_wait_info->target_usec;
527 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
528 if (w->target_sec != first_wait_info->target_sec ||
529 w->target_usec != first_wait_info->target_usec)
533 LIST_DEL(&w->valid_link);
536 w->func(private_vblank, TDM_ERROR_NONE, w->target_seq,
537 w->target_sec, w->target_usec,
543 return TDM_ERROR_NONE;
547 _tdm_vblank_cb_vblank_SW_first(tdm_output *output, unsigned int sequence,
548 unsigned int tv_sec, unsigned int tv_usec,
551 tdm_vblank_wait_info *wait_info = user_data;
552 tdm_private_vblank *private_vblank;
553 tdm_vblank_wait_info *w = NULL, *ww = NULL;
554 unsigned int min_interval = 0;
557 if (!_tdm_vblank_check_valid(wait_info))
560 private_vblank = wait_info->private_vblank;
561 TDM_RETURN_IF_FAIL(private_vblank != NULL);
563 if (LIST_IS_EMPTY(&private_vblank->SW_pending_wait_list)) {
568 w = container_of((&private_vblank->SW_pending_wait_list)->next, w, link);
569 TDM_RETURN_IF_FAIL(w != NULL);
571 VDB("wait(%p) done", w);
573 min_interval = w->interval;
575 last = (unsigned long)tv_sec * 1000000 + tv_usec;
576 last -= private_vblank->offset * 1000;
578 private_vblank->last_seq = min_interval;
579 private_vblank->last_tv_sec = last / 1000000;
580 private_vblank->last_tv_usec = last % 1000000;
582 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_pending_wait_list, link) {
583 if (w->interval == min_interval) {
585 LIST_DEL(&w->valid_link);
588 w->func(private_vblank, TDM_ERROR_NONE, private_vblank->last_seq,
589 tv_sec, tv_usec, w->user_data);
593 w->interval -= min_interval;
594 _tdm_vblank_wait_SW(w);
600 _tdm_vblank_sw_timer_update(tdm_private_vblank *private_vblank)
602 tdm_vblank_wait_info *first_wait_info = NULL;
603 unsigned long curr, target;
607 if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
609 return TDM_ERROR_OPERATION_FAILED;
612 first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
613 curr = tdm_helper_get_time_in_micros();
614 target = first_wait_info->target_sec * 1000000 + first_wait_info->target_usec;
619 ms_delay = ceil((double)(target - curr) / 1000);
624 VDB("wait(%p) curr(%4lu) target(%4lu) ms_delay(%d)",
625 first_wait_info, curr, target, ms_delay);
627 tdm_display_lock(private_vblank->dpy);
629 if (!private_vblank->SW_timer) {
630 private_vblank->SW_timer =
631 tdm_event_loop_add_timer_handler(private_vblank->dpy,
632 _tdm_vblank_cb_vblank_SW,
635 if (!private_vblank->SW_timer) {
636 tdm_display_unlock(private_vblank->dpy);
637 VER("couldn't add timer");
640 VIN("Use SW vblank");
643 ret = tdm_event_loop_source_timer_update(private_vblank->SW_timer, ms_delay);
644 if (ret != TDM_ERROR_NONE) {
645 tdm_display_unlock(private_vblank->dpy);
646 VER("couldn't update timer");
650 tdm_display_unlock(private_vblank->dpy);
652 return TDM_ERROR_NONE;
657 _tdm_vblank_cb_vblank_align(tdm_output *output, unsigned int sequence,
658 unsigned int tv_sec, unsigned int tv_usec,
661 tdm_vblank_wait_info *align_info = user_data;
662 tdm_private_vblank *private_vblank;
663 unsigned int diff_sec, diff_usec;
665 if (!_tdm_vblank_check_valid(align_info))
668 private_vblank = align_info->private_vblank;
669 TDM_RETURN_IF_FAIL(private_vblank != NULL);
671 private_vblank->SW_align_wait = NULL;
672 private_vblank->SW_align_sec = tv_sec;
673 private_vblank->SW_align_usec = tv_usec;
675 LIST_DEL(&align_info->valid_link);
677 if (tv_usec > align_info->req_usec) {
678 diff_usec = tv_usec - align_info->req_usec;
679 diff_sec = tv_sec - align_info->req_sec;
681 diff_usec = 1000000 + tv_usec - align_info->req_usec;
682 diff_sec = tv_sec - align_info->req_sec - 1;
685 private_vblank->SW_align_offset = (double)(1000000 - diff_sec * 1000000 - diff_usec) / private_vblank->vrefresh;
689 /* align vblank continously only if non HW and DPMS on */
690 if (!private_vblank->HW_enable && private_vblank->dpms == TDM_OUTPUT_DPMS_ON)
691 _tdm_vblank_sw_timer_align(private_vblank);
695 _tdm_vblank_sw_timer_align(tdm_private_vblank *private_vblank)
697 tdm_vblank_wait_info *align_info;
701 if (private_vblank->SW_align_wait)
704 TDM_RETURN_IF_FAIL(private_vblank->dpms == TDM_OUTPUT_DPMS_ON);
706 align_info = calloc(1, sizeof *align_info);
712 LIST_ADDTAIL(&align_info->valid_link, &valid_wait_list);
713 align_info->stamp = ++stamp;
714 align_info->private_vblank = private_vblank;
716 curr = tdm_helper_get_time_in_micros();
717 align_info->req_sec = curr / 1000000;
718 align_info->req_usec = curr % 1000000;
720 ret = tdm_output_wait_vblank(private_vblank->output, private_vblank->vrefresh, 0,
721 _tdm_vblank_cb_vblank_align, align_info);
722 if (ret != TDM_ERROR_NONE) {
723 LIST_DEL(&align_info->valid_link);
728 private_vblank->SW_align_wait = align_info;
733 _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info)
735 tdm_private_vblank *private_vblank = wait_info->private_vblank;
738 if (private_vblank->last_tv_sec == 0 && private_vblank->dpms == TDM_OUTPUT_DPMS_ON) {
739 unsigned int do_wait = LIST_IS_EMPTY(&private_vblank->SW_pending_wait_list);
740 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_pending_wait_list);
742 ret = tdm_output_wait_vblank(private_vblank->output, 1, 0,
743 _tdm_vblank_cb_vblank_SW_first, wait_info);
744 if (ret == TDM_ERROR_DPMS_OFF) {
748 if (ret != TDM_ERROR_NONE) {
749 LIST_DEL(&wait_info->link);
752 VDB("wait(%p) waiting", wait_info);
754 return TDM_ERROR_NONE;
758 TDM_RETURN_VAL_IF_FAIL(wait_info->target_sec > 0, TDM_ERROR_OPERATION_FAILED);
760 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
762 ret = _tdm_vblank_sw_timer_update(private_vblank);
763 if (ret != TDM_ERROR_NONE) {
764 LIST_DEL(&wait_info->link);
765 VER("couldn't update sw timer");
769 return TDM_ERROR_NONE;
773 _tdm_vblank_calculate_target(tdm_vblank_wait_info *wait_info)
775 tdm_private_vblank *private_vblank = wait_info->private_vblank;
776 unsigned long last, prev, req, curr, target;
777 unsigned int skip = 0;
779 curr = tdm_helper_get_time_in_micros();
781 if (!private_vblank->HW_enable) {
782 if (private_vblank->last_tv_sec == 0) {
783 /* If last == 0 and DPMS == on, we will use HW vblank to sync with HW vblank. */
784 if (private_vblank->dpms == TDM_OUTPUT_DPMS_ON) {
787 private_vblank->last_tv_sec = curr / 1000000;
788 private_vblank->last_tv_usec = curr % 1000000;
793 /* last can be 0 when HW enable. But it doesn't matter if HW enable. */
794 if (!private_vblank->HW_enable)
795 TDM_RETURN_IF_FAIL(private_vblank->last_tv_sec != 0);
797 last = (unsigned long)private_vblank->last_tv_sec * 1000000 + private_vblank->last_tv_usec;
798 req = (unsigned long)wait_info->req_sec * 1000000 + wait_info->req_usec;
799 skip = (unsigned int)((req - last) / private_vblank->vblank_gap);
800 prev = last + skip * private_vblank->vblank_gap;
802 if (private_vblank->last_seq == 0)
805 skip += wait_info->interval;
807 if (private_vblank->HW_enable) {
808 unsigned int hw_skip = (unsigned int)((curr - prev) / private_vblank->HW_vblank_gap);
810 wait_info->target_hw_interval = wait_info->interval * private_vblank->HW_quotient;
811 wait_info->target_hw_interval -= hw_skip;
813 if (wait_info->target_hw_interval < 1)
814 wait_info->target_hw_interval = 1;
816 target = prev + wait_info->target_hw_interval * private_vblank->HW_vblank_gap;
818 target = prev + (unsigned long)(private_vblank->vblank_gap * wait_info->interval);
820 while (target < curr) {
821 target += (unsigned long)private_vblank->vblank_gap;
826 VDB("target_seq(%d) last_seq(%d) skip(%d)",
827 wait_info->target_seq, private_vblank->last_seq, skip);
830 target -= (private_vblank->SW_align_offset * skip * private_vblank->HW_quotient);
833 wait_info->target_seq = private_vblank->last_seq + skip;
834 wait_info->target_sec = target / 1000000;
835 wait_info->target_usec = target % 1000000;
837 VDB("wait(%p) last(%4lu) req(%4lu) prev(%4lu) curr(%4lu) skip(%d) hw_interval(%d) target(%4lu,%4lu)",
838 wait_info, last, req - last, prev - last, curr - last,
839 skip, wait_info->target_hw_interval, target, target - last);
843 tdm_vblank_wait(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
844 unsigned int interval, tdm_vblank_handler func, void *user_data)
846 tdm_private_vblank *private_vblank = vblank;
847 tdm_vblank_wait_info *wait_info;
850 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
851 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
853 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON && !private_vblank->enable_fake) {
854 VIN("can't wait a vblank because of DPMS off");
855 return TDM_ERROR_DPMS_OFF;
859 if (!private_vblank->SW_align_wait && private_vblank->dpms == TDM_OUTPUT_DPMS_ON)
860 _tdm_vblank_sw_timer_align(private_vblank);
863 if (private_vblank->check_HW_or_SW) {
864 private_vblank->check_HW_or_SW = 0;
865 private_vblank->vblank_gap = (double)1000000 / private_vblank->fps;
866 private_vblank->HW_quotient = private_vblank->vrefresh / private_vblank->fps;
868 if (private_vblank->dpms == TDM_OUTPUT_DPMS_ON &&
869 !(private_vblank->vrefresh % private_vblank->fps)) {
870 private_vblank->HW_enable = 1;
871 VIN("Use HW vblank");
873 private_vblank->HW_enable = 0;
874 VIN("Use SW vblank");
878 wait_info = calloc(1, sizeof *wait_info);
881 return TDM_ERROR_OUT_OF_MEMORY;
884 LIST_INITHEAD(&wait_info->link);
885 LIST_ADDTAIL(&wait_info->valid_link, &valid_wait_list);
886 wait_info->stamp = ++stamp;
887 wait_info->req_sec = req_sec;
888 wait_info->req_usec = req_usec;
889 wait_info->interval = interval;
890 wait_info->func = func;
891 wait_info->user_data = user_data;
892 wait_info->private_vblank = private_vblank;
894 _tdm_vblank_calculate_target(wait_info);
896 if (private_vblank->HW_enable) {
897 ret = _tdm_vblank_wait_HW(wait_info);
898 if (ret == TDM_ERROR_DPMS_OFF) {
899 TDM_WRN("try to use SW");
900 ret = _tdm_vblank_wait_SW(wait_info);
904 ret = _tdm_vblank_wait_SW(wait_info);
906 if (ret != TDM_ERROR_NONE) {
907 LIST_DEL(&wait_info->link);
908 LIST_DEL(&wait_info->valid_link);
913 return TDM_ERROR_NONE;