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video: tegra: fix three overlay window blending

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Change-Id: I36e2540b5b98817b87efbe4ca2b1f4d4f19ceba4
Signed-off-by: Michael I. Gold <gold@nvidia.com>
This commit is contained in:
Ari Hirvonen
2010-12-30 15:27:28 +02:00
committed by Erik Gilling
parent 1af1da3f6b
commit b4c92f36c0
1 changed files with 4 additions and 2 deletions
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6
drivers/video/tegra/dc/dc.c
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@@ -369,7 +369,7 @@ static int get_topmost_window(u32 *depths, unsigned long *wins)
{
int idx, best = -1;
for_each_set_bit(idx, wins, sizeof(*wins)) {
for_each_set_bit(idx, wins, DC_N_WINDOWS) {
if (best == -1 || depths[idx] < depths[best])
best = idx;
}
@@ -406,13 +406,15 @@ static u32 blend_2win(int idx, unsigned long behind_mask, u32* flags, int xy)
static u32 blend_3win(int idx, unsigned long behind_mask, u32* flags)
{
unsigned long infront_mask;
int first;
infront_mask = ~(behind_mask | BIT(idx));
infront_mask &= (BIT(DC_N_WINDOWS) - 1);
first = ffs(infront_mask) - 1;
if (!infront_mask)
return blend_topwin(flags[idx]);
else if (behind_mask && flags[ffs(infront_mask)])
else if (behind_mask && first != -1 && flags[first])
return BLEND(NOKEY, DEPENDANT, 0x00, 0x00);
else
return BLEND(NOKEY, FIX, 0x0, 0x0);