igd.asl rewrite

Old igd.asl had inconsistent addresses (between _DOD and actual device)
and ghost devices. Any of those is enough to make brightness on windows
fail and make igd.asl out-of-ACPI-spec. Also old code favoured ridiculous
copying of the same thing 6 times per chipset. Leave only hooking up and
chipset-specific part in chipset directory. Move NVS handling and ACPI-spec
parts to a common file.

Change-Id: I556769e5e28b83e7465e3db689e26c8c0ab44757
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7472
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>

src/drivers/intel/gma/Kconfig

@@ -36,3 +36,7 @@ config INTEL_EDID
 config INTEL_INT15
 	bool
 	default n
+
+config INTEL_GMA_ACPI
+	bool
+	default n

src/drivers/intel/gma/Makefile.inc

@@ -23,3 +23,4 @@ ramstage-$(CONFIG_INTEL_EDID) += edid.c vbt.c
 ifeq ($(CONFIG_VGA_ROM_RUN),y)
 ramstage-$(CONFIG_INTEL_INT15) += int15.c
 endif
+ramstage-$(CONFIG_INTEL_GMA_ACPI) += acpi.c

src/drivers/intel/gma/acpi.c

@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2014 Vladimir Serbinenko
+ * Subject to the GNU GPL v2, or (at your option) any later version.
+ */
+
+#include <arch/acpi.h>
+#include <arch/acpigen.h>
+#include <string.h>
+#include "i915.h"
+
+void
+drivers_intel_gma_displays_ssdt_generate(const struct i915_gpu_controller_info *conf)
+{
+	size_t i;
+	const char *names[] = { "UNK", "VGA", "TV", "DVI", "LCD" };
+	int counters[ARRAY_SIZE(names)];
+
+	memset(counters, 0, sizeof(counters));
+
+	acpigen_write_scope("\\_SB.PCI0.GFX0");
+
+	/*
+	Method (_DOD, 0)
+	{
+		Return (Package() {
+				0x5a5a5a5a,
+				0x5a5a5a5a,
+				0x5a5a5a5a
+			})
+	}
+	*/
+	acpigen_write_method("_DOD", 0);
+	acpigen_emit_byte(0xa4); /* ReturnOp.  */
+	acpigen_write_package(conf->ndid);
+
+	for (i = 0; i < conf->ndid; i++) {
+		acpigen_write_dword (conf->did[i] | 0x80010000);
+	}
+	acpigen_pop_len(); /* End Package. */
+	acpigen_pop_len(); /* End Method. */
+
+	for (i = 0; i < conf->ndid; i++) {
+		char name[10];
+		char *ptr;
+		int kind;
+		kind = (conf->did[i] >> 8) & 0xf;
+		if (kind >= ARRAY_SIZE(names)) {
+			kind = 0;
+		}
+		strcpy(name, names[kind]);
+		for (ptr = name; *ptr; ptr++);
+		*ptr++ = counters[kind] + '0';
+		*ptr++ = '\0';
+		counters[kind]++;
+		acpigen_write_device(name);
+		/* Name (_ADR, 0x0410) */
+		acpigen_write_name_dword("_ADR", conf->did[i] & 0xffff);
+
+		/* ACPI brightness for LCD.  */
+		if (kind == 4) {
+			/*
+			  Method (_BCL, 0, NotSerialized)
+			  {
+			  	Return (^^XBCL())
+			  }
+			*/
+			acpigen_write_method("_BCL", 0);
+			acpigen_emit_byte(0xa4); /* ReturnOp.  */
+			acpigen_emit_namestring("^^XBCL");
+			acpigen_pop_len();
+
+			/*
+			  Method (_BCM, 1, NotSerialized)
+			  {
+			  	^^XBCM(Arg0)
+			  }
+			*/
+			acpigen_write_method("_BCM", 1);
+			acpigen_emit_namestring("^^XBCM");
+			acpigen_emit_byte(0x68); /* Arg0Op.  */
+			acpigen_pop_len();
+
+			/*
+			  Method (_BQC, 0, NotSerialized)
+			  {
+			  	Return (^^XBQC())
+			  }
+			*/
+			acpigen_write_method("_BQC", 0);
+			acpigen_emit_byte(0xa4); /* ReturnOp.  */
+			acpigen_emit_namestring("^^XBQC");
+			acpigen_pop_len();
+		}
+
+		/*
+		Method(_DCS, 0)
+		{
+			Return (^^XDCS(<device number>))
+		}
+		*/
+		acpigen_write_method("_DCS", 0);
+		acpigen_emit_byte(0xa4); /* ReturnOp.  */
+		acpigen_emit_namestring("^^XDCS");
+		acpigen_write_byte(i);
+		acpigen_pop_len();
+
+		/*
+		Method(_DGS, 0)
+		{
+			Return (^^XDGS(<device number>))
+		}
+		*/
+		acpigen_write_method("_DGS", 0);
+		acpigen_emit_byte(0xa4); /* ReturnOp.  */
+		acpigen_emit_namestring("^^XDGS");
+		acpigen_write_byte(i);
+		acpigen_pop_len();
+
+		/*
+		Method(_DSS, 1)
+		{
+			^^XDSS(0x5a, Arg0)
+		}
+		*/
+		acpigen_write_method("_DSS", 0);
+		acpigen_emit_namestring("^^XDSS");
+		acpigen_write_byte(i);
+		acpigen_emit_byte(0x68); /* Arg0Op.  */
+		acpigen_pop_len();
+
+		acpigen_pop_len();
+	}
+
+	acpigen_pop_len();
+}

src/drivers/intel/gma/i915.h

@@ -292,8 +292,15 @@ struct i915_gpu_controller_info
 	int link_frequency_270_mhz;
 	int lvds_num_lanes;
 	u32 backlight;
+	int ndid;
+	u32 did[5];
 };
 
+void
+drivers_intel_gma_displays_ssdt_generate(const struct i915_gpu_controller_info *conf);
+const struct i915_gpu_controller_info *
+intel_gma_get_controller_info(void);
+
 int i915lightup(unsigned int physbase, unsigned int mmio,
 		unsigned int gfx, unsigned int init_fb);
 int panel_lightup(struct intel_dp *dp, unsigned int init_fb);

src/drivers/intel/gma/igd.asl

@@ -0,0 +1,113 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ *
+ * 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; version 2 of
+ * the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+	External(LCD0, DeviceObj)
+
+	Name (BRCT, 0)
+
+	Method(BRID, 1, NotSerialized)
+	{
+		Store (Match (BRIG, MEQ, Arg0, MTR, Zero, 2), Local0)
+		If (LEqual (Local0, Ones))
+		{
+			Return (Subtract(SizeOf(BRIG), One))
+		}
+		Return (Local0)
+	}
+
+	Method (XBCL, 0, NotSerialized)
+	{
+		Store (1, BRCT)
+		Return (BRIG)
+	}
+
+	/* Display Output Switching */
+	Method (_DOS, 1)
+	{
+		/* Windows 2000 and Windows XP call _DOS to enable/disable
+		 * Display Output Switching during init and while a switch
+		 * is already active
+		 */
+		Store (And(Arg0, 7), DSEN)
+	}
+
+	/* Using Notify is the right way. But Windows doesn't handle
+	   it well. So use both method in a way to avoid double action.
+	 */
+	Method (DECB, 0, NotSerialized)
+	{
+		If (BRCT)
+		{
+			Notify (LCD0, 0x87)
+		} Else {
+			Store (BRID (XBQC ()), Local0)
+			If (LNotEqual (Local0, 2))
+			{
+				Decrement (Local0)
+			}
+			XBCM (DerefOf (Index (BRIG, Local0)))
+		}
+	}
+
+	Method (INCB, 0, NotSerialized)
+	{
+		If (BRCT)
+		{
+			Notify (LCD0, 0x86)
+		} Else {
+			Store (BRID (XBQC ()), Local0)
+			If (LNotEqual (Local0, Subtract(SizeOf(BRIG), One)))
+			{
+				Increment (Local0)
+			}
+			XBCM (DerefOf (Index (BRIG, Local0)))
+		}
+	}
+
+	/* Device Current Status */
+	Method(XDCS, 1)
+	{
+		TRAP(1)
+		If (And(CSTE, ShiftLeft (1, Arg0))) {
+			Return (0x1f)
+		}
+		Return(0x1d)
+	}
+
+	/* Query Device Graphics State */
+	Method(XDGS, 1)
+	{
+		If (And(NSTE, ShiftLeft (1, Arg0))) {
+			Return(1)
+		}
+		Return(0)
+	}
+
+	/* Device Set State */
+	Method(XDSS, 2)
+	{
+		/* If Parameter Arg0 is (1 << 31) | (1 << 30), the
+		 * display switch was completed
+		 */
+		If (LEqual(And(Arg0, 0xc0000000), 0xc0000000)) {
+			Store (NSTE, CSTE)
+		}
+	}