offb: Add support for framebuffer handoff to offb.

This allows offb to be used for initial framebuffer,
and a kms driver to take over later in the boot sequence.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/video/offb.c b/drivers/video/offb.c
index 4d8c54c23dd7..b043ac83c412 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -282,8 +282,17 @@ static int offb_set_par(struct fb_info *info)
         return 0;
 }
 
+static void offb_destroy(struct fb_info *info)
+{
+        if (info->screen_base)
+                iounmap(info->screen_base);
+        release_mem_region(info->aperture_base, info->aperture_size);
+        framebuffer_release(info);
+}
+
 static struct fb_ops offb_ops = {
         .owner          = THIS_MODULE,
+        .fb_destroy     = offb_destroy,
         .fb_setcolreg   = offb_setcolreg,
         .fb_set_par     = offb_set_par,
         .fb_blank       = offb_blank,
@@ -482,10 +491,14 @@ static void __init offb_init_fb(const char *name, const char *full_name,
         var->sync = 0;
         var->vmode = FB_VMODE_NONINTERLACED;
 
+        /* set offb aperture size for generic probing */
+        info->aperture_base = address;
+        info->aperture_size = fix->smem_len;
+
         info->fbops = &offb_ops;
         info->screen_base = ioremap(address, fix->smem_len);
         info->pseudo_palette = (void *) (info + 1);
-        info->flags = FBINFO_DEFAULT | foreign_endian;
+        info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian;
 
         fb_alloc_cmap(&info->cmap, 256, 0);