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path: root/drivers/video/fbmem.c
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Diffstat (limited to 'drivers/video/fbmem.c')
-rw-r--r--drivers/video/fbmem.c29
1 files changed, 26 insertions, 3 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index a15b44e..03f2dc2 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1468,16 +1468,39 @@ static int fb_check_foreignness(struct fb_info *fi)
return 0;
}
-static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
+static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
{
/* is the generic aperture base the same as the HW one */
- if (gen->aperture_base == hw->aperture_base)
+ if (gen->base == hw->base)
return true;
/* is the generic aperture base inside the hw base->hw base+size */
- if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size)
+ if (gen->base > hw->base && gen->base <= hw->base + hw->size)
return true;
return false;
}
+
+static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
+{
+ int i, j;
+ struct apertures_struct *hwa = hw->apertures;
+ struct apertures_struct *gena = gen->apertures;
+ if (!hwa || !gena)
+ return false;
+
+ for (i = 0; i < hwa->count; ++i) {
+ struct aperture *h = &hwa->ranges[i];
+ for (j = 0; j < gena->count; ++j) {
+ struct aperture *g = &gena->ranges[j];
+ printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
+ g->base, g->size, h->base, h->size);
+ if (apertures_overlap(g, h))
+ return true;
+ }
+ }
+
+ return false;
+}
+
/**
* register_framebuffer - registers a frame buffer device
* @fb_info: frame buffer info structure

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