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 /* We expact "(unsigned int)(0.0016667 / 0.0016667) = 1". But it becomes 0. */
56 #define TDM_TIME_MARGIN 0.0000001
58 #define TDM_VBLANK_UINT_MAX 4294967295U
59 #define TDM_VBLANK_UINT_1Q 1073741823U /* UINT_MAX / 4 */
60 #define TDM_VBLANK_UINT_3Q 3221225471U /* UINT_MAX / 4 * 3 */
62 /* (seq < TDM_VBLANK_UINT_1Q && TDM_VBLANK_UINT_3Q < last_seq) means
63 * that the sequence value has reached the max value and started from 0 again.
65 #define TDM_VBLANK_SEQ_REACHED_MAX(seq, last_seq) \
66 ((seq) < TDM_VBLANK_UINT_1Q && TDM_VBLANK_UINT_3Q < (last_seq))
68 #define VER(fmt, arg...) TDM_ERR("[%p] "fmt, private_vblank, ##arg)
69 #define VWR(fmt, arg...) TDM_WRN("[%p] "fmt, private_vblank, ##arg)
70 #define VIN(fmt, arg...) TDM_INFO("[%p] "fmt, private_vblank, ##arg)
71 #define VDB(fmt, arg...) TDM_DBG("[%p] "fmt, private_vblank, ##arg)
78 } tdm_vblank_wait_type;
80 typedef struct _tdm_vblank_wait_info tdm_vblank_wait_info;
82 typedef struct _tdm_private_vblank {
83 struct list_head valid_link;
91 unsigned int vrefresh;
93 unsigned int check_HW_or_SW;
96 unsigned int enable_fake;
99 unsigned int quotient;
101 unsigned int last_seq;
104 unsigned int add_front;
107 double HW_vblank_gap;
108 struct list_head HW_wait_list;
111 tdm_event_loop_source *SW_timer;
112 struct list_head SW_wait_list;
113 } tdm_private_vblank;
115 struct _tdm_vblank_wait_info {
116 struct list_head link;
117 struct list_head valid_link;
122 unsigned int interval;
124 tdm_vblank_handler func;
126 tdm_private_vblank *private_vblank;
128 tdm_vblank_wait_type type;
131 unsigned int target_seq;
134 /* valid_vblank_list and valid_wait_list should be protected by valid_list_lock because
135 * tdm_vblank can be used in multi-thread.
137 static pthread_mutex_t valid_list_lock;
138 static struct list_head valid_vblank_list;
139 static struct list_head valid_wait_list;
140 static unsigned int vblank_list_inited;
141 static double stamp = 0;
143 static tdm_error _tdm_vblank_cb_vblank_SW(void *user_data);
144 static tdm_error _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info);
148 _print_list(struct list_head *list)
150 tdm_vblank_wait_info *w = NULL;
152 LIST_FOR_EACH_ENTRY(w, list, link) {
153 printf(" %d", w->interval);
160 _tdm_vblank_valid_list_add(struct list_head *valid_link, struct list_head *valid_list)
162 pthread_mutex_lock(&valid_list_lock);
163 LIST_ADDTAIL(valid_link, valid_list);
164 pthread_mutex_unlock(&valid_list_lock);
168 _tdm_vblank_valid_list_del(struct list_head *valid_link)
170 pthread_mutex_lock(&valid_list_lock);
171 LIST_DEL(valid_link);
172 pthread_mutex_unlock(&valid_list_lock);
175 static inline tdm_private_vblank*
176 _tdm_vblank_find(double vblank_stamp)
178 tdm_private_vblank *v = NULL;
183 pthread_mutex_lock(&valid_list_lock);
184 LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
185 if (v->stamp == vblank_stamp) {
186 pthread_mutex_unlock(&valid_list_lock);
190 pthread_mutex_unlock(&valid_list_lock);
195 static inline unsigned int
196 _tdm_vblank_check_valid_wait(tdm_vblank_wait_info *wait_info)
198 tdm_vblank_wait_info *w = NULL;
203 pthread_mutex_lock(&valid_list_lock);
204 LIST_FOR_EACH_ENTRY(w, &valid_wait_list, valid_link) {
205 if (w->stamp == wait_info->stamp) {
206 pthread_mutex_unlock(&valid_list_lock);
210 pthread_mutex_unlock(&valid_list_lock);
215 static inline unsigned int
216 _tdm_vblank_find_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
218 tdm_vblank_wait_info *w = NULL;
223 LIST_FOR_EACH_ENTRY(w, list, link) {
224 if (w->stamp == wait_info->stamp)
232 _tdm_vblank_insert_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
234 tdm_vblank_wait_info *w = NULL;
235 tdm_vblank_wait_info *found = NULL;
237 if (LIST_IS_EMPTY(list)) {
238 LIST_ADDTAIL(&wait_info->link, list);
242 LIST_FOR_EACH_ENTRY(w, list, link) {
243 if (wait_info->type == VBLANK_TYPE_SW) {
244 if (wait_info->target_time == 0)
245 TDM_NEVER_GET_HERE();
246 if (w->target_time <= wait_info->target_time) {
251 if (w->interval <= wait_info->interval) {
259 LIST_ADD(&wait_info->link, &found->link);
261 LIST_ADDTAIL(&wait_info->link, list->next);
265 _tdm_vblank_change_to_SW(tdm_private_vblank *private_vblank)
267 tdm_vblank_wait_info *w = NULL, *ww = NULL;
269 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
271 w->type = VBLANK_TYPE_SW_FAKE;
272 _tdm_vblank_wait_SW(w);
277 _tdm_vblank_free_HW_wait(tdm_private_vblank *private_vblank, tdm_error error, unsigned int call_cb)
279 tdm_vblank_wait_info *w = NULL, *ww = NULL;
281 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
283 _tdm_vblank_valid_list_del(&w->valid_link);
285 if (call_cb && w->func)
286 w->func(private_vblank, error, 0, 0, 0, w->user_data);
293 _tdm_vblank_cb_output_change(tdm_output *output, tdm_output_change_type type,
294 tdm_value value, void *user_data)
296 tdm_private_vblank *private_vblank = user_data;
298 TDM_RETURN_IF_FAIL(private_vblank != NULL);
301 case TDM_OUTPUT_CHANGE_DPMS:
302 if (private_vblank->dpms == value.u32)
304 VIN("dpms %s", tdm_dpms_str(value.u32));
305 private_vblank->dpms = value.u32;
306 private_vblank->check_HW_or_SW = 1;
307 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON) {
308 if (private_vblank->enable_fake)
309 _tdm_vblank_change_to_SW(private_vblank);
311 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_DPMS_OFF, 1);
314 case TDM_OUTPUT_CHANGE_CONNECTION:
315 VIN("output %s", tdm_status_str(value.u32));
316 if (value.u32 == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)
317 _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
325 tdm_vblank_create(tdm_display *dpy, tdm_output *output, tdm_error *error)
327 tdm_private_vblank *private_vblank;
328 const tdm_output_mode *mode = NULL;
329 tdm_output_dpms dpms = TDM_OUTPUT_DPMS_ON;
332 TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(dpy != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
333 TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
336 *error = TDM_ERROR_NONE;
338 if (!vblank_list_inited) {
339 if (pthread_mutex_init(&valid_list_lock, NULL)) {
340 TDM_ERR("mutex init failed: %m");
342 *error = TDM_ERROR_OPERATION_FAILED;
345 LIST_INITHEAD(&valid_vblank_list);
346 LIST_INITHEAD(&valid_wait_list);
347 vblank_list_inited = 1;
350 tdm_output_get_mode(output, &mode);
353 *error = TDM_ERROR_OPERATION_FAILED;
358 tdm_output_get_dpms(output, &dpms);
360 private_vblank = calloc(1, sizeof * private_vblank);
361 if (!private_vblank) {
363 *error = TDM_ERROR_OUT_OF_MEMORY;
368 tdm_output_add_change_handler(output, _tdm_vblank_cb_output_change, private_vblank);
370 private_vblank->stamp = ++stamp;
371 private_vblank->owner_tid = syscall(SYS_gettid);
372 private_vblank->dpy = dpy;
373 private_vblank->output = output;
374 private_vblank->dpms = dpms;
375 private_vblank->vrefresh = mode->vrefresh;
376 private_vblank->HW_vblank_gap = 1.0 / private_vblank->vrefresh;
378 private_vblank->check_HW_or_SW = 1;
379 private_vblank->fps = mode->vrefresh;
381 LIST_INITHEAD(&private_vblank->HW_wait_list);
382 LIST_INITHEAD(&private_vblank->SW_wait_list);
384 _tdm_vblank_valid_list_add(&private_vblank->valid_link, &valid_vblank_list);
386 if (tdm_debug_module & TDM_DEBUG_VBLANK)
387 VIN("created. vrefresh(%d) dpms(%d)",
388 private_vblank->vrefresh, private_vblank->dpms);
390 return (tdm_vblank *)private_vblank;
394 tdm_vblank_destroy(tdm_vblank *vblank)
396 tdm_private_vblank *private_vblank = vblank;
397 tdm_vblank_wait_info *w = NULL, *ww = NULL;
402 _tdm_vblank_valid_list_del(&private_vblank->valid_link);
404 if (private_vblank->SW_timer) {
405 tdm_display_lock(private_vblank->dpy);
406 tdm_event_loop_source_remove(private_vblank->SW_timer);
407 tdm_display_unlock(private_vblank->dpy);
410 tdm_output_remove_change_handler(private_vblank->output,
411 _tdm_vblank_cb_output_change, private_vblank);
413 _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
415 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
417 _tdm_vblank_valid_list_del(&w->valid_link);
421 if (tdm_debug_module & TDM_DEBUG_VBLANK)
424 free(private_vblank);
428 tdm_vblank_set_fps(tdm_vblank *vblank, unsigned int fps)
430 tdm_private_vblank *private_vblank = vblank;
432 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
433 TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
435 if (private_vblank->fps == fps)
436 return TDM_ERROR_NONE;
438 private_vblank->fps = fps;
439 private_vblank->check_HW_or_SW = 1;
441 if (tdm_debug_module & TDM_DEBUG_VBLANK)
442 VIN("fps(%d)", private_vblank->fps);
444 return TDM_ERROR_NONE;
448 tdm_vblank_set_offset(tdm_vblank *vblank, int offset)
450 tdm_private_vblank *private_vblank = vblank;
452 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
454 if (private_vblank->offset == offset)
455 return TDM_ERROR_NONE;
457 private_vblank->offset = offset;
458 private_vblank->check_HW_or_SW = 1;
460 if (tdm_debug_module & TDM_DEBUG_VBLANK)
461 VIN("offset(%d)", private_vblank->offset);
463 return TDM_ERROR_NONE;
467 tdm_vblank_set_enable_fake(tdm_vblank *vblank, unsigned int enable_fake)
469 tdm_private_vblank *private_vblank = vblank;
471 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
473 if (private_vblank->enable_fake == enable_fake)
474 return TDM_ERROR_NONE;
476 private_vblank->enable_fake = enable_fake;
478 if (tdm_debug_module & TDM_DEBUG_VBLANK)
479 VIN("enable_fake(%d)", private_vblank->enable_fake);
481 return TDM_ERROR_NONE;
485 tdm_vblank_get_enable_fake(tdm_vblank *vblank)
487 tdm_private_vblank *private_vblank = vblank;
489 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, 0);
491 return private_vblank->enable_fake;
495 _tdm_vblank_sw_timer_update(tdm_private_vblank *private_vblank)
497 tdm_vblank_wait_info *first_wait_info = NULL;
502 if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
504 return TDM_ERROR_OPERATION_FAILED;
507 first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
508 curr = tdm_helper_get_time();
509 target = first_wait_info->target_time;
511 /* ms_delay should be more that 1 */
515 ms_delay = ceil((target - curr) * 1000.0);
521 VER("wait(%p) curr(%.6f) target(%.6f) ms_delay(%d)", first_wait_info, curr, target, ms_delay);
522 else if (tdm_debug_module & TDM_DEBUG_VBLANK)
523 VIN("wait(%p) curr(%.6f) target(%.6f) ms_delay(%d)", first_wait_info, curr, target, ms_delay);
525 tdm_display_lock(private_vblank->dpy);
527 if (!private_vblank->SW_timer) {
528 private_vblank->SW_timer =
529 tdm_event_loop_add_timer_handler(private_vblank->dpy,
530 _tdm_vblank_cb_vblank_SW,
533 if (!private_vblank->SW_timer) {
534 tdm_display_unlock(private_vblank->dpy);
535 VER("couldn't add timer");
538 VIN("Use SW vblank");
541 ret = tdm_event_loop_source_timer_update(private_vblank->SW_timer, ms_delay);
542 if (ret != TDM_ERROR_NONE) {
543 tdm_display_unlock(private_vblank->dpy);
544 VER("couldn't update timer");
548 tdm_display_unlock(private_vblank->dpy);
550 return TDM_ERROR_NONE;
554 _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
555 unsigned int tv_sec, unsigned int tv_usec,
558 tdm_vblank_wait_info *wait_info = user_data;
559 tdm_private_vblank *private_vblank;
561 if (!_tdm_vblank_check_valid_wait(wait_info)) {
562 TDM_DBG("can't find wait(%p) from valid_wait_list", wait_info);
566 private_vblank = wait_info->private_vblank;
567 TDM_RETURN_IF_FAIL(private_vblank != NULL);
569 if (!_tdm_vblank_find_wait(wait_info, &private_vblank->HW_wait_list)) {
570 VDB("can't find wait(%p)", wait_info);
574 if (wait_info->type == VBLANK_TYPE_HW_SW) {
577 LIST_DEL(&wait_info->link);
579 /* kernel sends the wrong time of first vblank event. and the time of
580 * second vblank is correct.
582 wait_info->target_time = TDM_TIME(tv_sec, tv_usec);
583 wait_info->target_time += (((double)private_vblank->offset) / 1000.0);
585 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
587 ret = _tdm_vblank_sw_timer_update(private_vblank);
589 /* wait_info will be freed in _tdm_vblank_cb_vblank_SW() */
590 if (ret == TDM_ERROR_NONE) {
591 if (tdm_debug_module & TDM_DEBUG_VBLANK)
592 VIN("wait(%p) SW timer", wait_info);
596 VWR("couldn't update sw timer");
599 /* tv_sec & tv_usec shouldn't be zero. But sometimes they are zero in some hardware.
600 * We need to prohibit that last_time becomes zero because "last_time == 0" means
601 * that a tdm_vblank object is just created and doesn't have the first vblank event.
602 * If last_time becomes 0, it would make issue.
604 if (tv_sec == 0 && tv_usec == 0) {
605 double curr = tdm_helper_get_time();
606 tv_sec = TDM_TIME_SEC(curr);
607 tv_usec = TDM_TIME_USEC(curr);
610 private_vblank->last_seq = wait_info->target_seq;
611 private_vblank->last_time = TDM_TIME(tv_sec, tv_usec);
613 if (tdm_debug_module & TDM_DEBUG_VBLANK)
614 VIN("wait(%p) last(%.6f) sequence(%u) done", wait_info, private_vblank->last_time, wait_info->target_seq);
617 wait_info->func(private_vblank, TDM_ERROR_NONE, wait_info->target_seq,
618 tv_sec, tv_usec, wait_info->user_data);
620 LIST_DEL(&wait_info->link);
621 _tdm_vblank_valid_list_del(&wait_info->valid_link);
626 _tdm_vblank_wait_HW(tdm_vblank_wait_info *wait_info)
628 tdm_private_vblank *private_vblank = wait_info->private_vblank;
632 _tdm_vblank_insert_wait(wait_info, &private_vblank->HW_wait_list);
634 hw_interval = wait_info->interval * private_vblank->quotient;
636 if (private_vblank->last_time == 0) {
637 /* SW vblank starts from now. SW vblank doesn't need to be aligned with HW vblank. */
638 private_vblank->last_seq = 0;
639 private_vblank->last_time = tdm_helper_get_time();
641 /* +1 ms to call the handler ASAP at the first. no matter for SW timer. */
642 wait_info->target_seq = 1;
643 if (tdm_debug_module & TDM_DEBUG_VBLANK)
644 VIN("wait(%p) last(%.6f) hw_itvl(%d) targ_seq(%u)",
645 wait_info, private_vblank->last_time, hw_interval, wait_info->target_seq);
647 double last, prev, req, curr, target;
650 last = private_vblank->last_time;
651 req = wait_info->req_time;
653 skip = (unsigned int)((req - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
654 prev = last + private_vblank->vblank_gap * skip;
656 curr = tdm_helper_get_time();
658 while (target < curr)
659 target += private_vblank->vblank_gap;
661 hw_interval = (unsigned int)((target - curr) / private_vblank->HW_vblank_gap + TDM_TIME_MARGIN) + 1;
663 wait_info->target_seq = private_vblank->last_seq;
664 wait_info->target_seq += (unsigned int)((target - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
666 if (hw_interval > 300)
667 VER("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) hw_itvl(%d) targ_seq(%u)",
668 wait_info, last, req - last, prev - last, curr - last, target, target - last,
669 skip, hw_interval, wait_info->target_seq);
670 else if (tdm_debug_module & TDM_DEBUG_VBLANK)
671 VIN("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) hw_itvl(%d) targ_seq(%u)",
672 wait_info, last, req - last, prev - last, curr - last, target, target - last,
673 skip, hw_interval, wait_info->target_seq);
676 if (private_vblank->add_front)
677 ret = tdm_output_wait_vblank_add_front(private_vblank->output, hw_interval, 0,
678 _tdm_vblank_cb_vblank_HW, wait_info);
680 ret = tdm_output_wait_vblank(private_vblank->output, hw_interval, 0,
681 _tdm_vblank_cb_vblank_HW, wait_info);
683 if (ret != TDM_ERROR_NONE) {
684 LIST_DEL(&wait_info->link);
688 if (tdm_debug_module & TDM_DEBUG_VBLANK)
689 VIN("wait(%p) waiting", wait_info);
691 return TDM_ERROR_NONE;
695 _tdm_vblank_cb_vblank_SW(void *user_data)
697 tdm_private_vblank *private_vblank = user_data;
699 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_OPERATION_FAILED);
701 return tdm_vblank_cb_vblank_SW(private_vblank, 0);
705 tdm_vblank_cb_vblank_SW(tdm_vblank *vblank, double vblank_stamp)
707 tdm_private_vblank *private_vblank;
708 tdm_vblank_wait_info *first_wait_info = NULL, *w = NULL, *ww = NULL;
710 TDM_RETURN_VAL_IF_FAIL(vblank || vblank_stamp > 0, TDM_ERROR_INVALID_PARAMETER);
713 private_vblank = vblank;
715 private_vblank = _tdm_vblank_find(vblank_stamp);
716 if (!private_vblank) {
717 TDM_DBG("can't find vblank(%.0f) from valid_list", vblank_stamp);
718 return TDM_ERROR_NONE;
722 if (private_vblank->owner_tid != syscall(SYS_gettid)) {
723 tdm_thread_cb_vblank_sw vblank_sw;
724 tdm_private_display *private_display = private_vblank->dpy;
727 vblank_sw.base.type = TDM_THREAD_CB_VBLANK_SW;
728 vblank_sw.base.length = sizeof vblank_sw;
729 vblank_sw.vblank_stamp = private_vblank->stamp;
731 ret = tdm_thread_send_cb(private_display->private_loop, &vblank_sw.base);
732 TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
734 return TDM_ERROR_NONE;
737 if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
739 return TDM_ERROR_OPERATION_FAILED;
742 first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
743 TDM_RETURN_VAL_IF_FAIL(first_wait_info != NULL, TDM_ERROR_OPERATION_FAILED);
745 if (private_vblank->last_seq >= first_wait_info->target_seq)
746 TDM_ERR("last_seq(%u) target_seq(%u)", private_vblank->last_seq, first_wait_info->target_seq);
748 private_vblank->last_seq = first_wait_info->target_seq;
749 private_vblank->last_time = first_wait_info->target_time;
751 if (tdm_debug_module & TDM_DEBUG_VBLANK)
752 VIN("wait(%p) last(%.6f) sequence(%u) done", first_wait_info, private_vblank->last_time, first_wait_info->target_seq);
754 LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
755 if (w->target_time != first_wait_info->target_time)
759 _tdm_vblank_valid_list_del(&w->valid_link);
762 tdm_display_unlock(private_vblank->dpy);
763 w->func(private_vblank, TDM_ERROR_NONE, w->target_seq,
764 TDM_TIME_SEC(w->target_time), TDM_TIME_USEC(w->target_time),
766 tdm_display_lock(private_vblank->dpy);
772 return TDM_ERROR_NONE;
776 _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info)
778 tdm_private_vblank *private_vblank = wait_info->private_vblank;
781 if (private_vblank->last_time == 0) {
782 /* SW vblank starts from now. SW vblank doesn't need to be aligned with HW vblank. */
783 private_vblank->last_seq = 0;
784 private_vblank->last_time = tdm_helper_get_time();
786 /* +1 ms to call the handler ASAP at the first. no matter for SW timer. */
787 wait_info->target_seq = 1;
788 wait_info->target_time = private_vblank->last_time + 0.001;
790 if (tdm_debug_module & TDM_DEBUG_VBLANK)
791 VIN("wait(%p) last(%.6f) target(%.6f) target sequence(%u)",
792 wait_info, private_vblank->last_time, wait_info->target_time, wait_info->target_seq);
794 double last, prev, req, curr, target;
797 last = private_vblank->last_time;
798 req = wait_info->req_time;
800 skip = (unsigned int)((req - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
801 prev = last + private_vblank->vblank_gap * skip;
803 curr = tdm_helper_get_time();
804 target = prev + private_vblank->vblank_gap * wait_info->interval;
806 while (target < curr)
807 target += private_vblank->vblank_gap;
809 wait_info->target_seq = private_vblank->last_seq;
810 wait_info->target_seq += (unsigned int)((target - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
812 wait_info->target_time = target;
814 if (tdm_debug_module & TDM_DEBUG_VBLANK)
815 VIN("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) targ_seq(%u)",
816 wait_info, last, req - last, prev - last, curr - last,
817 target, target - last, skip, wait_info->target_seq);
820 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
822 ret = _tdm_vblank_sw_timer_update(private_vblank);
823 if (ret != TDM_ERROR_NONE) {
824 LIST_DEL(&wait_info->link);
825 VER("couldn't update sw timer");
829 return TDM_ERROR_NONE;
833 tdm_vblank_wait(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
834 unsigned int interval, tdm_vblank_handler func, void *user_data)
836 tdm_private_vblank *private_vblank = vblank;
837 tdm_vblank_wait_info *wait_info;
840 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
841 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
843 if (private_vblank->owner_tid != syscall(SYS_gettid)) {
844 TDM_ERR("SHOULD be called in the owner thread(%d)", (int)private_vblank->owner_tid);
845 return TDM_ERROR_BAD_REQUEST;
848 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON && !private_vblank->enable_fake) {
849 VIN("can't wait a vblank because of DPMS off");
850 return TDM_ERROR_DPMS_OFF;
853 wait_info = calloc(1, sizeof * wait_info);
856 return TDM_ERROR_OUT_OF_MEMORY;
859 /* set request time to current time if 0. This function seems to be called in server side. */
860 if (req_sec == 0 && req_usec == 0) {
861 double curr = tdm_helper_get_time();
862 req_sec = TDM_TIME_SEC(curr);
863 req_usec = TDM_TIME_USEC(curr);
866 LIST_INITHEAD(&wait_info->link);
868 _tdm_vblank_valid_list_add(&wait_info->valid_link, &valid_wait_list);
870 wait_info->stamp = ++stamp;
871 wait_info->req_time = TDM_TIME(req_sec, req_usec);
872 wait_info->interval = interval;
873 wait_info->func = func;
874 wait_info->user_data = user_data;
875 wait_info->private_vblank = private_vblank;
877 if (private_vblank->check_HW_or_SW) {
878 private_vblank->check_HW_or_SW = 0;
879 private_vblank->vblank_gap = 1.0 / private_vblank->fps;
880 private_vblank->quotient = private_vblank->vrefresh / private_vblank->fps;
883 /* 1) if fps != factor of vrefresh, SW timer
884 * 2) if fps == factor of vrefresh && dpms == off, SW timer (Fake HW vblank)
885 * 2) if fps == factor of vrefresh && dpms == on && offset == 0, HW vblank
886 * 3) if fps == factor of vrefresh && dpms == on && offset != 0, HW vblank + SW timer
887 * In case of 1), we really don't need to align with HW vblank.
889 if (private_vblank->vrefresh % private_vblank->fps)
890 wait_info->type = VBLANK_TYPE_SW;
891 else if (private_vblank->dpms == TDM_OUTPUT_DPMS_OFF)
892 wait_info->type = VBLANK_TYPE_SW_FAKE;
893 else if (private_vblank->offset == 0)
894 wait_info->type = VBLANK_TYPE_HW;
896 wait_info->type = VBLANK_TYPE_HW_SW;
898 if (wait_info->type == VBLANK_TYPE_SW || wait_info->type == VBLANK_TYPE_SW_FAKE)
899 ret = _tdm_vblank_wait_SW(wait_info);
901 ret = _tdm_vblank_wait_HW(wait_info);
902 if (ret == TDM_ERROR_DPMS_OFF)
903 ret = _tdm_vblank_wait_SW(wait_info);
906 if (ret != TDM_ERROR_NONE) {
907 LIST_DEL(&wait_info->link);
908 _tdm_vblank_valid_list_del(&wait_info->valid_link);
913 return TDM_ERROR_NONE;
917 tdm_vblank_wait_seq(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
918 unsigned int sequence, tdm_vblank_handler func, void *user_data)
920 tdm_private_vblank *private_vblank = vblank;
921 unsigned int interval;
923 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
924 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
926 /* if the sequence of vblank reaches the max value, sequence can be 0. */
928 if (private_vblank->last_seq == 0) {
929 TDM_WRN("can't calculate interval with sequence(%u)", sequence);
931 } else if (sequence > private_vblank->last_seq ||
932 TDM_VBLANK_SEQ_REACHED_MAX(sequence, private_vblank->last_seq)) {
933 double last, curr, seq_target;
935 last = private_vblank->last_time;
936 curr = tdm_helper_get_time();
937 seq_target = last + private_vblank->vblank_gap * (sequence - private_vblank->last_seq);
939 /* If target is old or too close(1ms) to current, we call the handler immediately.
940 * 2ms? it seems too much.
942 if (seq_target < curr) {
943 func(vblank, TDM_ERROR_NONE, sequence,
944 TDM_TIME_SEC(seq_target), TDM_TIME_USEC(seq_target),
946 return TDM_ERROR_NONE;
947 } else if ((seq_target - curr) < 0.001) { /* 1ms */
948 func(vblank, TDM_ERROR_NONE, sequence,
949 TDM_TIME_SEC(curr), TDM_TIME_USEC(curr),
951 return TDM_ERROR_NONE;
954 interval = (unsigned int)((seq_target - curr) / private_vblank->vblank_gap + TDM_TIME_MARGIN) + 1;
956 /* this seems error. But we handle this like normal to avoid the unexpected error in cliend side */
957 TDM_WRN("sequence(%u) should be over the last sequence(%u)", sequence, private_vblank->last_seq);
958 func(vblank, TDM_ERROR_NONE, private_vblank->last_seq,
959 TDM_TIME_SEC(private_vblank->last_time), TDM_TIME_USEC(private_vblank->last_time),
961 return TDM_ERROR_NONE;
964 return tdm_vblank_wait(vblank, req_sec, req_usec, interval, func, user_data);
968 tdm_vblank_set_add_front(tdm_vblank *vblank, unsigned int add_front)
970 tdm_private_vblank *private_vblank = vblank;
972 TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
974 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
976 if (private_vblank->add_front == add_front)
977 return TDM_ERROR_NONE;
979 private_vblank->add_front = add_front;
981 return TDM_ERROR_NONE;