commit b3b9fa34bb99d33d0fc6a69c64966a71cebd5bd6
author Nico Huber <nico.h@gmx.de> Mon Jun 18 14:16:41 2018
committer Nico Huber <nico.h@gmx.de> Wed May 08 13:22:44 2019
tree 5ad88af76af9172a9b85d83d19593e1bf86aac23
parent 8a9062a0842c70920ac1c95ba48b7d4f2e1538f0

gma: Fix Ironlake panel fitting, revisited

This time avoid scaling to odd heights, too. At least Sandy Bridge
has trouble with this.

Change-Id: Ib7dfe1fd289661ecd6949eca4b39860dbecc4463
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/libgfxinit/+/27153
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

common/hw-gfx-gma-pipe_setup.adb

diff --git a/common/hw-gfx-gma-pipe_setup.adb b/common/hw-gfx-gma-pipe_setup.adb
index 76051dd..0a2cbcf 100644
--- a/common/hw-gfx-gma-pipe_setup.adb
+++ b/common/hw-gfx-gma-pipe_setup.adb
@@ -508,6 +508,10 @@
       if Width < Mode.H_Visible and Width mod 2 = 1 then
          Width := Width + 1;
       end if;
+      -- Do not scale to odd height (at least Sandy Bridge makes trouble).
+      if Height < Mode.V_Visible and Height mod 2 = 1 then
+         Height := Height + 1;
+      end if;
 
       X := (Mode.H_Visible - Width) / 2;
       Y := (Mode.V_Visible - Height) / 2;