coreboot_tables: specify clear interface for lb_framebuffer()

For some reason the "interface" for adding framebuffer information
is sitting in src/include/vbe.h while also guarding the call to
fill_lb_framebuffer() with vbe_mode_info_valid() along with some
macro if CONFIG_* for good measure.

Move the fill_lb_framebuffer() declaration to coreboot_tables.h and
provide a comment about how it should be used. Also, now that
there's no need for the notion of a global vbe_mode_info_valid()
remove it from the conditional call path of fill_lb_framebuffer().

Change-Id: Ib3ade6314624091ae70424664527a02b279d0c9b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/19729
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 3 insertions, 4 deletions

diff --git a/src/drivers/intel/gma/gma.ads b/src/drivers/intel/gma/gma.ads
index d912df1635..157ec89fcc 100644
--- a/src/drivers/intel/gma/gma.ads
+++ b/src/drivers/intel/gma/gma.ads
@@ -15,9 +15,6 @@ is
 
    ----------------------------------------------------------------------------
 
-   function vbe_mode_info_valid return Interfaces.C.int;
-   pragma Export (C, vbe_mode_info_valid, "vbe_mode_info_valid");
-
    type lb_framebuffer is record
       tag                  : word32;
       size                 : word32;
@@ -37,7 +34,9 @@ is
       reserved_mask_size   : word8;
    end record;
 
-   procedure fill_lb_framebuffer (framebuffer : out lb_framebuffer);
+   function fill_lb_framebuffer
+     (framebuffer : in out lb_framebuffer)
+      return Interfaces.C.int;
    pragma Export (C, fill_lb_framebuffer, "fill_lb_framebuffer");
 
 end GMA;