[coreboot-gerrit] [S] Change in libgfxinit[main]: [WIP] Tiny display experiments

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/c/libgfxinit/+/84299?usp=email )

Change subject: [WIP] Tiny display experiments
......................................................................

[WIP] Tiny display experiments

Change-Id: Ic5a1a9edab44c5c2cbbc5408b83c08b348d0d2d6
Signed-off-by: Nico Huber 
---
M common/hw-gfx-gma-panel.adb
M gfxtest/hw-gfx-gma-gfx_test.adb
2 files changed, 20 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/99/84299/1

diff --git a/common/hw-gfx-gma-panel.adb b/common/hw-gfx-gma-panel.adb
index 532bf67..cda69b9 100644
--- a/common/hw-gfx-gma-panel.adb
+++ b/common/hw-gfx-gma-panel.adb
@@ -428,6 +428,8 @@
          Registers.Set_Mask
            (Register => BLC (Panel).CTL,
             Mask     => BXT_BLC_PWM_CTL_ENABLE);
+         Registers.Write (BLC (Panel).FREQ, 38_400_000 / 400);
+         Registers.Write (BLC (Panel).DUTY, 38_400_000 / 600);
       end if;

Registers.Set_Mask
diff --git a/gfxtest/hw-gfx-gma-gfx_test.adb b/gfxtest/hw-gfx-gma-gfx_test.adb
index 6a10657..91ad1ca 100644
--- a/gfxtest/hw-gfx-gma-gfx_test.adb
+++ b/gfxtest/hw-gfx-gma-gfx_test.adb
@@ -359,6 +359,20 @@

for Pipe in GMA.Pipe_Index loop
          if Pipes (Pipe).Port /= GMA.Disabled then
+            if Pipes (Pipe).Mode.H_Visible = 480 then
+               --Pipes (Pipe).Mode.V_Visible := 128;
+
+               -- EDID fix
+               Pipes (Pipe).Mode.V_Total := Pipes (Pipe).Mode.V_Sync_End + 12;
+               Pipes (Pipe).Mode.H_Total := Pipes (Pipe).Mode.H_Sync_End + 43;
+
+               -- ~30Hz override
+               Pipes (Pipe).Mode.Dotclock := (30
+                  * Frequency_Type (Pipes (Pipe).Mode.H_Total)
+                  * Frequency_Type (Pipes (Pipe).Mode.V_Total)
+                  * 1000) / 1001;
+            end if;
+
             Calc_Framebuffer
               (FB       => Pipes (Pipe).Framebuffer,
                Mode     => Pipes (Pipe).Mode,
@@ -609,13 +623,13 @@
                   Pipes (Pipe).Framebuffer.Height;
             begin
                New_FB.Start_X := Position_Type'Min
-                 (Width - 320, Rand_Div (Width));
+                 (Width - Width / 10, Rand_Div (Width));
                New_FB.Start_Y := Position_Type'Min
-                 (Height - 320, Rand_Div (Height));
+                 (Height - Height / 10, Rand_Div (Height));
                New_FB.Width := Width_Type'Max
-                 (320, Width - New_FB.Start_X - Rand_Div (Width));
+                 (Width / 10, Width - New_FB.Start_X - Rand_Div (Width));
                New_FB.Height := Height_Type'Max
-                 (320, Height - New_FB.Start_Y - Rand_Div (Height));
+                 (Height / 10, Height - New_FB.Start_Y - Rand_Div (Height));

Cursor.Center_X := Rotated_Width (New_FB) / 2;
                Cursor.Center_Y := Rotated_Height (New_FB) / 2;