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Fix new video sync-to-blank code for multi-head 

We need to account for a non-zero Y offset for the CRTC. Without
this, we don't sync to the correct region, so tearing becomes
visible again.
This commit is contained in:
Carl Worth 2009-04-06 14:02:08 -07:00
parent 3d4ee3cac1
commit 5d9d9a2e46
1 changed files with 5 additions and 2 deletions
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7
src/i830_video.c
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@ -2517,6 +2517,7 @@ I830PutImage(ScrnInfoPtr pScrn,
if (sync) {
BoxPtr box;
int y1, y2;
int event, pipe;
I830CrtcPrivatePtr intel_crtc = crtc->driver_private;
@ -2529,14 +2530,16 @@ I830PutImage(ScrnInfoPtr pScrn,
}
box = REGION_EXTENTS(unused, clipBoxes);
y1 = box->y1 - crtc->y;
y2 = box->y2 - crtc->y;
BEGIN_BATCH(5);
/* The documentation says that the LOAD_SCAN_LINES command
* always comes in pairs. Don't ask me why. */
OUT_BATCH(MI_LOAD_SCAN_LINES_INCL | pipe);
OUT_BATCH((box->y1 << 16) | box->y2);
OUT_BATCH((y1 << 16) | y2);
OUT_BATCH(MI_LOAD_SCAN_LINES_INCL | pipe);
OUT_BATCH((box->y1 << 16) | box->y2);
OUT_BATCH((y1 << 16) | y2);
OUT_BATCH(MI_WAIT_FOR_EVENT | event);
ADVANCE_BATCH();
}