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sna: Relax scanline waits on HSW to be emittable from either ring 

My overzealous reading of the bspec lead me to the conclusion that the
MI_LOAD_SCANLINES command was only available on the blitter ring. This
is false, thankfully, and allows us to do vsync'ed Xv.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-04-02 14:29:29 +01:00
parent 5a36fdcee7
commit 4e2fc5aee0
1 changed files with 2 additions and 3 deletions
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5
src/sna/sna_display.c
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@ -2887,15 +2887,13 @@ static bool sna_emit_wait_for_scanline_hsw(struct sna *sna,
uint32_t event;
uint32_t *b;
if (sna->kgem.mode != KGEM_BLT)
return false;
b = kgem_get_batch(&sna->kgem);
sna->kgem.nbatch += 5;
/* The documentation says that the LOAD_SCAN_LINES command
* always comes in pairs. Don't ask me why. */
switch (pipe) {
default: assert(0);
case 0: event = 0; break;
case 1: event = 1 << 19; break;
case 2: event = 4 << 19; break;
@ -2904,6 +2902,7 @@ static bool sna_emit_wait_for_scanline_hsw(struct sna *sna,
b[3] = b[1] = (y1 << 16) | (y2-1);
switch (pipe) {
default: assert(0);
case 0: event = 0; break;
case 1: event = 1 << 8; break;
case 2: event = 1 << 14; break;