[PATCH] nvidiafb: Fallback to firmware EDID

If nvidiafb fails to probe the EDID block, get the EDID from the BIOS.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 12 insertions, 4 deletions

diff --git a/drivers/video/nvidia/nv_i2c.c b/drivers/video/nvidia/nv_i2c.c
index 1a91bffdda26..ace484fa61ce 100644
--- a/drivers/video/nvidia/nv_i2c.c
+++ b/drivers/video/nvidia/nv_i2c.c
@@ -194,8 +194,9 @@ static u8 *nvidia_do_probe_i2c_edid(struct nvidia_i2c_chan *chan)
         return NULL;
 }
 
-int nvidia_probe_i2c_connector(struct nvidia_par *par, int conn, u8 **out_edid)
+int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)
 {
+        struct nvidia_par *par = info->par;
         u8 *edid = NULL;
         int i;
 
@@ -205,10 +206,17 @@ int nvidia_probe_i2c_connector(struct nvidia_par *par, int conn, u8 **out_edid)
                 if (edid)
                         break;
         }
+
+        if (!edid && conn == 1) {
+                /* try to get from firmware */
+                edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+                if (edid)
+                        memcpy(edid, fb_firmware_edid(info->device),
+                               EDID_LENGTH);
+        }
+
         if (out_edid)
                 *out_edid = edid;
-        if (!edid)
-                return 1;
 
-        return 0;
+        return (edid) ? 0 : 1;
 }