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[ARM] pxa: fix overlay being un-necessarily initialized on pxa25x 

pxa25x doesn't support overlay in its LCD controller, this patch adds
pxafb_overlay_supported() functions to check the initialization is
necessary.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
This commit is contained in:
Eric Miao 2009-03-19 15:24:30 +08:00
parent c68ffddabc
commit 782385ae17
1 changed files with 14 additions and 0 deletions
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14
drivers/video/pxafb.c
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@ -883,10 +883,21 @@ static void __devinit init_pxafb_overlay(struct pxafb_info *fbi,
init_completion(&ofb->branch_done);
}
static inline int pxafb_overlay_supported(void)
{
if (cpu_is_pxa27x() || cpu_is_pxa3xx())
return 1;
return 0;
}
static int __devinit pxafb_overlay_init(struct pxafb_info *fbi)
{
int i, ret;
if (!pxafb_overlay_supported())
return 0;
for (i = 0; i < 2; i++) {
init_pxafb_overlay(fbi, &fbi->overlay[i], i);
ret = register_framebuffer(&fbi->overlay[i].fb);
@ -909,6 +920,9 @@ static void __devexit pxafb_overlay_exit(struct pxafb_info *fbi)
{
int i;
if (!pxafb_overlay_supported())
return;
for (i = 0; i < 2; i++)
unregister_framebuffer(&fbi->overlay[i].fb);
}