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sna: Disable periodic scanout refresh if all outputs are disconnected 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-07-10 19:01:12 +01:00
parent 85fdc3143b
commit 665c9cbdcf
3 changed files with 9 additions and 6 deletions
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7
src/sna/sna_accel.c
View File

@ -12292,7 +12292,12 @@ sna_accel_flush_callback(CallbackListPtr *list,
static struct sna_pixmap *sna_accel_scanout(struct sna *sna)
{
struct sna_pixmap *priv = sna_pixmap(sna->front);
struct sna_pixmap *priv;
if (sna->vblank_interval == 0)
return NULL;
priv = sna_pixmap(sna->front);
return priv && priv->gpu_bo ? priv : NULL;
}

5
src/sna/sna_display.c
View File

@ -821,9 +821,10 @@ static void update_flush_interval(struct sna *sna)
}
if (max_vrefresh == 0)
max_vrefresh = 40;
sna->vblank_interval = 0;
else
sna->vblank_interval = 1000 / max_vrefresh; /* Hz -> ms */
sna->vblank_interval = 1000 / max_vrefresh; /* Hz -> ms */
DBG(("max_vrefresh=%d, vblank_interval=%d ms\n",
max_vrefresh, sna->vblank_interval));
}

3
src/sna/sna_driver.c
View File

@ -499,9 +499,6 @@ static Bool sna_pre_init(ScrnInfoPtr scrn, int flags)
if (xf86ReturnOptValBool(sna->Options, OPTION_TILING_FB, FALSE))
sna->tiling &= ~SNA_TILING_FB;
/* Default fail-safe value of 75 Hz */
sna->vblank_interval = 1000 * 1000 * 1000 / 75;
sna->flags = 0;
if (!xf86ReturnOptValBool(sna->Options, OPTION_THROTTLE, TRUE))
sna->flags |= SNA_NO_THROTTLE;