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OMAP: DSS2: Fix update area calculations with multiple scaled overlays 

When there are multiple scaled overlays simply checking whether the update
area intersects any of them in order is not enough. If eg. VID1 starts out
completely outside the update area but VID2 causes the update area to
increase in such a way that VID1 now falls partially within the increased
update area VID1 should be rechecked and the update area possibly
increased even further to fully encompass VID1. So simply keep looping
over the overlays until such time that none of the overlays caused the
update area to change.

Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Tomi Valkeinen 2010-06-09 15:09:30 +03:00
parent 75c7d59daf
commit 8cab90fdb4
1 changed files with 63 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

111
drivers/video/omap2/dss/manager.c
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@ -972,6 +972,7 @@ void dss_setup_partial_planes(struct omap_dss_device *dssdev,
int i;
u16 x, y, w, h;
unsigned long flags;
bool area_changed;
x = *xi;
y = *yi;
@ -992,70 +993,84 @@ void dss_setup_partial_planes(struct omap_dss_device *dssdev,
spin_lock_irqsave(&dss_cache.lock, flags);
/* We need to show the whole overlay if it is scaled. So look for
* those, and make the update area larger if found.
* Also mark the overlay cache dirty */
for (i = 0; i < num_ovls; ++i) {
unsigned x1, y1, x2, y2;
unsigned outw, outh;
/*
* Execute the outer loop until the inner loop has completed
* once without increasing the update area. This will ensure that
* all scaled overlays end up completely within the update area.
*/
do {
area_changed = false;
oc = &dss_cache.overlay_cache[i];
/* We need to show the whole overlay if it is scaled. So look
* for those, and make the update area larger if found.
* Also mark the overlay cache dirty */
for (i = 0; i < num_ovls; ++i) {
unsigned x1, y1, x2, y2;
unsigned outw, outh;
if (oc->channel != mgr->id)
continue;
oc = &dss_cache.overlay_cache[i];
oc->dirty = true;
if (oc->channel != mgr->id)
continue;
if (!oc->enabled)
continue;
oc->dirty = true;
if (!dispc_is_overlay_scaled(oc))
continue;
if (!oc->enabled)
continue;
outw = oc->out_width == 0 ? oc->width : oc->out_width;
outh = oc->out_height == 0 ? oc->height : oc->out_height;
if (!dispc_is_overlay_scaled(oc))
continue;
/* is the overlay outside the update region? */
if (!rectangle_intersects(x, y, w, h,
oc->pos_x, oc->pos_y,
outw, outh))
continue;
outw = oc->out_width == 0 ?
oc->width : oc->out_width;
outh = oc->out_height == 0 ?
oc->height : oc->out_height;
/* if the overlay totally inside the update region? */
if (rectangle_subset(oc->pos_x, oc->pos_y, outw, outh,
x, y, w, h))
continue;
/* is the overlay outside the update region? */
if (!rectangle_intersects(x, y, w, h,
oc->pos_x, oc->pos_y,
outw, outh))
continue;
if (x > oc->pos_x)
x1 = oc->pos_x;
else
x1 = x;
/* if the overlay totally inside the update region? */
if (rectangle_subset(oc->pos_x, oc->pos_y, outw, outh,
x, y, w, h))
continue;
if (y > oc->pos_y)
y1 = oc->pos_y;
else
y1 = y;
if (x > oc->pos_x)
x1 = oc->pos_x;
else
x1 = x;
if ((x + w) < (oc->pos_x + outw))
x2 = oc->pos_x + outw;
else
x2 = x + w;
if (y > oc->pos_y)
y1 = oc->pos_y;
else
y1 = y;
if ((y + h) < (oc->pos_y + outh))
y2 = oc->pos_y + outh;
else
y2 = y + h;
if ((x + w) < (oc->pos_x + outw))
x2 = oc->pos_x + outw;
else
x2 = x + w;
x = x1;
y = y1;
w = x2 - x1;
h = y2 - y1;
if ((y + h) < (oc->pos_y + outh))
y2 = oc->pos_y + outh;
else
y2 = y + h;
make_even(&x, &w);
x = x1;
y = y1;
w = x2 - x1;
h = y2 - y1;
DSSDBG("changing upd area due to ovl(%d) scaling %d,%d %dx%d\n",
make_even(&x, &w);
DSSDBG("changing upd area due to ovl(%d) "
"scaling %d,%d %dx%d\n",
i, x, y, w, h);
}
area_changed = true;
}
} while (area_changed);
mc = &dss_cache.manager_cache[mgr->id];
mc->do_manual_update = true;