android/android_hardware_qcom_display
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hwc: Unlock prev. buffers in N+1th draw round.

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Unlock previously locked overlay buferrs in N+1th draw round, rather than N+2th.
This is now possible because of wait for PAN.
Provides an opportunity to improve genlock behavior and makes it more ICS like.

(cherry picked from commit b3a4cd7944397565388b4e940fb41d2af8882687)

Change-Id: I48f937b77d59b31f3bf04c5a2eb35500bd5d76d6
This commit is contained in:
Saurabh Shah
2012-08-23 08:41:05 -07:00
committed by Andrew Sutherland
parent dc733193ef
commit 0a2352aee5
1 changed files with 1 additions and 3 deletions
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4
libhwcomposer/hwc.cpp
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@ -83,9 +83,6 @@ static int hwc_prepare(hwc_composer_device_t *dev, hwc_layer_list_t* list)
if(ctx->mExtDisplay->getExternalDisplay())
ovutils::setExtType(ctx->mExtDisplay->getExternalDisplay());
//Prepare is called after a vsync, so unlock previous buffers here.
ctx->qbuf->unlockAllPrevious();
if (LIKELY(list)) {
//reset for this draw round
VideoOverlay::reset();
@ -194,6 +191,7 @@ static int hwc_set(hwc_composer_device_t *dev,
if(!ctx->overlayInUse)
ctx->mOverlay->setState(ovutils::OV_CLOSED);
ctx->qbuf->unlockAllPrevious();
return ret;
}