gma: Add G45 support
The following ports are implemented: HDMI/DVI, VGA, LVDS and DP.
Tested with gfx_test and coreboot on a Thinkpad X200 (GM45).
Change-Id: Ifc05a1516329a61772af84558e5bfceb4d4ca277
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/21295
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: Nico Huber <nico.h@gmx.de>
diff --git a/common/g45/hw-gfx-gma-gmch-lvds.adb b/common/g45/hw-gfx-gma-gmch-lvds.adb
new file mode 100644
index 0000000..746f8c1
--- /dev/null
+++ b/common/g45/hw-gfx-gma-gmch-lvds.adb
@@ -0,0 +1,81 @@
+--
+-- Copyright (C) 2015-2016 secunet Security Networks AG
+-- Copyright (C) 2016 Nico Huber <nico.h@gmx.de>
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+
+with HW.GFX.GMA.Config;
+with HW.GFX.GMA.Registers;
+
+with HW.Debug;
+with GNAT.Source_Info;
+
+package body HW.GFX.GMA.GMCH.LVDS is
+
+ LVDS_ENABLE : constant := 1 * 2 ** 31;
+ LVDS_DITHER_EN : constant := 1 * 2 ** 25;
+ LVDS_VSYNC_POLARITY_INVERT : constant := 1 * 2 ** 21;
+ LVDS_HSYNC_POLARITY_INVERT : constant := 1 * 2 ** 20;
+ LVDS_CLK_A_DATA_A0A2_POWER_MASK : constant := 3 * 2 ** 8;
+ LVDS_CLK_A_DATA_A0A2_POWER_DOWN : constant := 0 * 2 ** 8;
+ LVDS_CLK_A_DATA_A0A2_POWER_UP : constant := 3 * 2 ** 8;
+ LVDS_CLK_B_POWER_MASK : constant := 3 * 2 ** 4;
+ LVDS_CLK_B_POWER_DOWN : constant := 0 * 2 ** 4;
+ LVDS_CLK_B_POWER_UP : constant := 3 * 2 ** 4;
+ LVDS_DATA_B0B2_POWER_MASK : constant := 3 * 2 ** 2;
+ LVDS_DATA_B0B2_POWER_DOWN : constant := 0 * 2 ** 2;
+ LVDS_DATA_B0B2_POWER_UP : constant := 3 * 2 ** 2;
+
+ ----------------------------------------------------------------------------
+
+ procedure On (Port_Cfg : in Port_Config;
+ Pipe : in Pipe_Index)
+ is
+ Sync_Polarity : constant Word32 :=
+ (if Port_Cfg.Mode.H_Sync_Active_High then 0
+ else LVDS_HSYNC_POLARITY_INVERT) or
+ (if Port_Cfg.Mode.V_Sync_Active_High then 0
+ else LVDS_VSYNC_POLARITY_INVERT);
+
+ Two_Channel : constant Word32 :=
+ (if Port_Cfg.Mode.Dotclock >= Config.LVDS_Dual_Threshold then
+ LVDS_CLK_B_POWER_UP or LVDS_DATA_B0B2_POWER_UP else 0);
+ begin
+ pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
+ pragma Debug (Port_Cfg.Mode.BPC /= 6, Debug.Put_Line
+ ("WARNING: Only 18bpp LVDS mode implemented."));
+
+ Registers.Write
+ (Register => Registers.GMCH_LVDS,
+ Value => LVDS_ENABLE or
+ GMCH_PORT_PIPE_SELECT(Pipe) or
+ Sync_Polarity or
+ LVDS_CLK_A_DATA_A0A2_POWER_UP or
+ Two_Channel or
+ LVDS_DITHER_EN);
+ end On;
+
+ ----------------------------------------------------------------------------
+
+ procedure Off
+ is
+ begin
+ pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
+
+ Registers.Write
+ (Register => Registers.GMCH_LVDS,
+ Value => LVDS_CLK_A_DATA_A0A2_POWER_DOWN or
+ LVDS_CLK_B_POWER_DOWN or
+ LVDS_DATA_B0B2_POWER_DOWN);
+ end Off;
+
+end HW.GFX.GMA.GMCH.LVDS;