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intel: fix vblank crtc selection with DRI1 when only one pipe is enabled.

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On Mobile chipsets, we often enable PipeB instead of PipeA, but the test
in here was insufficient, falling back to pipe A if the area
intersection returned zero. Therefore, in the case where a window went
off to the top of the left of the screen, it would freeze, waiting on
the wrong vblank.

Fix this mess by checking the sarea for a crtc being zero sized, and in
that case always default to the other one.
This commit is contained in:
Owain Ainsworth 2009-01-21 21:57:24 +00:00 • committed by Jesse Barnes
parent 39b4061bb9
commit 0b5266ff64
1 changed files with 8 additions and 0 deletions
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8
src/mesa/drivers/dri/intel/intel_buffers.c
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@ -195,6 +195,14 @@ intelWindowMoved(struct intel_context *intel)
intel->intelScreen->driScrnPriv->ddx_version.minor >= 7) {
GLuint flags = intelFixupVblank(intel, dPriv);
/* Do the stupid test: Is one of them actually disabled?
*/
if (sarea->planeA_w == 0 || sarea->planeA_h == 0) {
flags = dPriv->vblFlags | VBLANK_FLAG_SECONDARY;
} else if (sarea->planeB_w == 0 || sarea->planeB_h == 0) {
flags = dPriv->vblFlags & ~VBLANK_FLAG_SECONDARY;
}
/* Check to see if we changed pipes */
if (flags != dPriv->vblFlags && dPriv->vblFlags &&
!(dPriv->vblFlags & VBLANK_FLAG_NO_IRQ)) {