Patch set updated for coreboot: drivers/intel/gma: Use scaling to simplify fb config

[Nico Huber]

Nico Huber ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17492

-gerrit

commit 55ed8e8ef2b255b49802a3af8049d7cc0ce5271c
Author: Nico Huber 
Date:   Tue Nov 8 12:29:50 2016 +0100

drivers/intel/gma: Use scaling to simplify fb config

Utilize libgfxinit's support for scaling to simplify the framebuffer
    configuration. In case of multiple displays of different resolutions,
    we had configured one framebuffer big enough for their union, each
    display only showing its respective upper left window. Instead, we use
    the smallest resolution now and show the whole image on all displays.

Change-Id: I70a9d92f88ef891703829945264f94ac7eff09b0
    Signed-off-by: Nico Huber 
---
 src/drivers/intel/gma/hires_fb/gma.adb | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/src/drivers/intel/gma/hires_fb/gma.adb b/src/drivers/intel/gma/hires_fb/gma.adb
index 7ebc4f8..87e0900 100644
--- a/src/drivers/intel/gma/hires_fb/gma.adb
+++ b/src/drivers/intel/gma/hires_fb/gma.adb
@@ -59,9 +59,8 @@ is

success : boolean;

-      stride : Width_Type;
-      max_h : pos16 := 1;
-      max_v : pos16 := 1;
+      min_h : pos16 := pos16'last;
+      min_v : pos16 := pos16'last;
    begin
       lightup_ok := 0;

@@ -77,30 +76,24 @@ is
             for i in Config_Index loop
                exit when configs (i).Port = Disabled;

-               max_h := pos16'max (max_h, configs (i).Mode.H_Visible);
-               max_v := pos16'max (max_v, configs (i).Mode.V_Visible);
+               min_h := pos16'min (min_h, configs (i).Mode.H_Visible);
+               min_v := pos16'min (min_v, configs (i).Mode.V_Visible);
             end loop;

-            stride := ((Width_Type (max_h) + 63) / 64) * 64;
+            fb :=
+               (Width   => Width_Type (min_h),
+                Height  => Height_Type (min_v),
+                BPC     => 8,
+                Stride  => ((Width_Type (min_h) + 63) / 64) * 64,
+                Offset  => 0);
             for i in Config_Index loop
                exit when configs (i).Port = Disabled;

-               configs (i).Framebuffer :=
-                 (Width    => Width_Type (configs (i).Mode.H_Visible),
-                  Height   => Height_Type (configs (i).Mode.V_Visible),
-                  BPC      => 8,
-                  Stride   => stride,
-                  Offset   => 0);
+               configs (i).Framebuffer := fb;
             end loop;

HW.GFX.GMA.Dump_Configs (configs);

-            fb :=
-               (Width   => Width_Type (max_h),
-                Height  => Height_Type (max_v),
-                BPC     => 8,
-                Stride  => stride,
-                Offset  => 0);
             HW.GFX.GMA.Setup_Default_GTT (fb, phys_fb);
             HW.GFX.Framebuffer_Filler.Fill (linear_fb, fb);