LineageOS/android_vendor_qcom_opensource_display-commonsys-intf
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hwc: sync-point implementation.

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Add sync pt implementation.
Add genlock and sync pt under conditional compilation flags.

Change-Id: I32fb7f6051ccc706662152e90ac15b6b6743f897
Signed-off-by: Iliyan Malchev <malchev@google.com>
This commit is contained in:
Kinjal Bhavsar
2012-09-18 18:27:59 -07:00
committed by Iliyan Malchev
parent 0a03dd8b11
commit 2dd04a873b
5 changed files with 89 additions and 0 deletions
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57
libhwcomposer/hwc_utils.cpp
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@@ -238,4 +238,61 @@ void wait4Pan(hwc_context_t* ctx) {
pthread_mutex_unlock(&m->fbPanLock);
}
}
int hwc_sync(hwc_display_contents_1_t* list) {
int ret = 0;
#ifdef USE_FENCE_SYNC
struct mdp_buf_sync data;
int acquireFd[10];
int count = 0;
int releaseFd = -1;
int fbFd = -1;
data.flags = 0;
data.acq_fen_fd = acquireFd;
data.rel_fen_fd = &releaseFd;
//Accumulate acquireFenceFds
for(uint32_t i = 0; i < list->numHwLayers; i++) {
if(list->hwLayers[i].compositionType == HWC_OVERLAY &&
list->hwLayers[i].acquireFenceFd != -1) {
acquireFd[count++] = list->hwLayers[i].acquireFenceFd;
}
}
if (count) {
data.acq_fen_fd_cnt = count;
//Open fb0 for ioctl
fbFd = open("/dev/graphics/fb0", O_RDWR);
if (fbFd < 0) {
ALOGE("%s: /dev/graphics/fb0 not available", __FUNCTION__);
return -1;
}
//Waits for acquire fences, returns a release fence
ret = ioctl(fbFd, MSMFB_BUFFER_SYNC, &data);
if(ret < 0) {
ALOGE("ioctl MSMFB_BUFFER_SYNC failed, err=%s",
strerror(errno));
}
close(fbFd);
for(uint32_t i = 0; i < list->numHwLayers; i++) {
if(list->hwLayers[i].compositionType == HWC_OVERLAY) {
//Close the acquireFenceFds
if(list->hwLayers[i].acquireFenceFd > 0) {
close(list->hwLayers[i].acquireFenceFd);
list->hwLayers[i].acquireFenceFd = -1;
}
//Populate releaseFenceFds.
if (releaseFd != -1)
list->hwLayers[i].releaseFenceFd = dup(releaseFd);
}
}
if (releaseFd != -1)
close(releaseFd);
}
#endif
return ret;
}
};//namespace