drivers/intel/gma: Move IGD OpRegion to CBMEM

It never was in GNVS, it never belonged among the ACPI tables. Having
it in CBMEM, makes it easy to look the location up on resume, and saves
us additional boilerplate.

TEST=Booted Linux on Lenovo/X201s, confirmed ASLS is set and
     intel_backlight + acpi_video synchronize, both before and
     after suspend.

Change-Id: I5fdd6634e4a671a85b1df8bc9815296ff42edf29
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40724
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

7 files changed, 14 insertions, 307 deletions

diff --git a/src/northbridge/intel/gm45/gma.c b/src/northbridge/intel/gm45/gma.c
index 0c97b64b39..e9bd722da9 100644
--- a/src/northbridge/intel/gm45/gma.c
+++ b/src/northbridge/intel/gm45/gma.c
@@ -11,8 +11,6 @@
 #include <string.h>
 #include <device/pci_ops.h>
 #include <commonlib/helpers.h>
-#include <cbmem.h>
-#include <southbridge/intel/i82801ix/nvs.h>
 #include <types.h>
 
 #include "drivers/intel/gma/i915_reg.h"
@@ -31,19 +29,6 @@ void gtt_write(u32 reg, u32 data)
 	write32(res2mmio(gtt_res, reg, 0), data);
 }
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static u32 get_cdclk(struct device *const dev)
 {
 	const u16 cdclk_sel =
@@ -165,6 +150,8 @@ static void gma_func0_init(struct device *dev)
 	struct edid edid_lvds;
 	const struct northbridge_intel_gm45_config *const conf = dev->chip_info;
 
+	intel_gma_init_igd_opregion();
+
 	/* IGD needs to be Bus Master */
 	reg32 = pci_read_config32(dev, PCI_COMMAND);
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
@@ -203,8 +190,6 @@ static void gma_func0_init(struct device *dev)
 			generate_fake_intel_oprom(&conf->gfx, dev, "$VBT CANTIGA");
 		}
 	}
-
-	intel_gma_restore_opregion();
 }
 
 static void gma_generate_ssdt(const struct device *device)
@@ -214,32 +199,6 @@ static void gma_generate_ssdt(const struct device *device)
 	drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
 }
 
-static unsigned long
-gma_write_acpi_tables(const struct device *const dev,
-		      unsigned long current,
-		      struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
-}
-
 static const char *gma_acpi_name(const struct device *dev)
 {
 	return "GFX0";
@@ -257,7 +216,6 @@ static struct device_operations gma_func0_ops = {
 	.init			= gma_func0_init,
 	.ops_pci		= &gma_pci_ops,
 	.acpi_name		= gma_acpi_name,
-	.write_acpi_tables	= gma_write_acpi_tables,
 };
 
 static const unsigned short pci_device_ids[] =
diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c
index 0caa64fe11..ae9e25704d 100644
--- a/src/northbridge/intel/haswell/gma.c
+++ b/src/northbridge/intel/haswell/gma.c
@@ -4,7 +4,6 @@
 #include <arch/io.h>
 #include <device/mmio.h>
 #include <device/pci_ops.h>
-#include <cbmem.h>
 #include <console/console.h>
 #include <bootmode.h>
 #include <delay.h>
@@ -16,7 +15,6 @@
 #include <drivers/intel/gma/libgfxinit.h>
 #include <cpu/intel/haswell/haswell.h>
 #include <drivers/intel/gma/opregion.h>
-#include <southbridge/intel/lynxpoint/nvs.h>
 #include <string.h>
 #include <types.h>
 
@@ -209,19 +207,6 @@ int gtt_poll(u32 reg, u32 mask, u32 value)
 	return 0;
 }
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static void power_well_enable(void)
 {
 	gtt_write(HSW_PWR_WELL_CTL1, HSW_PWR_WELL_ENABLE);
@@ -475,6 +460,8 @@ static void gma_func0_init(struct device *dev)
 	int lightup_ok = 0;
 	u32 reg32;
 
+	intel_gma_init_igd_opregion();
+
 	/* IGD needs to be Bus Master */
 	reg32 = pci_read_config32(dev, PCI_COMMAND);
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
@@ -509,7 +496,6 @@ static void gma_func0_init(struct device *dev)
 	gma_pm_init_post_vbios(dev);
 
 	gma_enable_swsci();
-	intel_gma_restore_opregion();
 }
 
 static void gma_generate_ssdt(const struct device *dev)
@@ -519,31 +505,6 @@ static void gma_generate_ssdt(const struct device *dev)
 	drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
 }
 
-static unsigned long gma_write_acpi_tables(const struct device *const dev,
-					   unsigned long current,
-					   struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
-}
-
 static struct pci_operations gma_pci_ops = {
 	.set_subsystem = pci_dev_set_subsystem,
 };
@@ -555,7 +516,6 @@ static struct device_operations gma_func0_ops = {
 	.init			= gma_func0_init,
 	.acpi_fill_ssdt		= gma_generate_ssdt,
 	.ops_pci		= &gma_pci_ops,
-	.write_acpi_tables	= gma_write_acpi_tables,
 };
 
 static const unsigned short pci_device_ids[] = {
diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c
index dfdd2fa34e..181aee56e7 100644
--- a/src/northbridge/intel/i945/gma.c
+++ b/src/northbridge/intel/i945/gma.c
@@ -18,8 +18,6 @@
 #include <pc80/vga.h>
 #include <pc80/vga_io.h>
 #include <commonlib/helpers.h>
-#include <cbmem.h>
-#include <southbridge/intel/i82801gx/nvs.h>
 #include <types.h>
 
 #include "i945.h"
@@ -43,19 +41,6 @@
 
 #define DEFAULT_BLC_PWM 180
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static int gtt_setup(u8 *mmiobase)
 {
 	unsigned long PGETBL_save;
@@ -677,6 +662,8 @@ static void gma_func0_init(struct device *dev)
 {
 	u32 reg32;
 
+	intel_gma_init_igd_opregion();
+
 	/* Unconditionally reset graphics */
 	pci_write_config8(dev, GDRST, 1);
 	udelay(50);
@@ -707,8 +694,6 @@ static void gma_func0_init(struct device *dev)
 		/* PCI Init, will run VBIOS */
 		pci_dev_init(dev);
 	}
-
-	intel_gma_restore_opregion();
 }
 
 /* This doesn't reclaim stolen UMA memory, but IGD could still
@@ -763,32 +748,6 @@ static void gma_func0_read_resources(struct device *dev)
 	pci_dev_read_resources(dev);
 }
 
-static unsigned long
-gma_write_acpi_tables(const struct device *const dev,
-		      unsigned long current,
-		      struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
-}
-
 static const char *gma_acpi_name(const struct device *dev)
 {
 	return "GFX0";
@@ -807,7 +766,6 @@ static struct device_operations gma_func0_ops = {
 	.disable		= gma_func0_disable,
 	.ops_pci		= &gma_pci_ops,
 	.acpi_name		= gma_acpi_name,
-	.write_acpi_tables	= gma_write_acpi_tables,
 };
 
 
diff --git a/src/northbridge/intel/ironlake/gma.c b/src/northbridge/intel/ironlake/gma.c
index 1836d84253..6de64fb065 100644
--- a/src/northbridge/intel/ironlake/gma.c
+++ b/src/northbridge/intel/ironlake/gma.c
@@ -13,9 +13,7 @@
 #include <drivers/intel/gma/intel_bios.h>
 #include <drivers/intel/gma/libgfxinit.h>
 #include <pc80/vga.h>
-#include <southbridge/intel/ibexpeak/nvs.h>
 #include <drivers/intel/gma/opregion.h>
-#include <cbmem.h>
 #include <types.h>
 
 #include "chip.h"
@@ -64,19 +62,6 @@ int gtt_poll(u32 reg, u32 mask, u32 value)
 	return 0;
 }
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static void gma_pm_init_post_vbios(struct device *dev)
 {
 	struct northbridge_intel_ironlake_config *conf = dev->chip_info;
@@ -152,6 +137,8 @@ static void gma_func0_init(struct device *dev)
 {
 	u32 reg32;
 
+	intel_gma_init_igd_opregion();
+
 	/* IGD needs to be Bus Master */
 	reg32 = pci_read_config32(dev, PCI_COMMAND);
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
@@ -180,7 +167,6 @@ static void gma_func0_init(struct device *dev)
 	gma_pm_init_post_vbios(dev);
 
 	gma_enable_swsci();
-	intel_gma_restore_opregion();
 }
 
 static void gma_read_resources(struct device *dev)
@@ -209,32 +195,6 @@ static void gma_generate_ssdt(const struct device *device)
 	drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
 }
 
-static unsigned long
-gma_write_acpi_tables(const struct device *const dev,
-		      unsigned long current,
-		      struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
-}
-
 static struct pci_operations gma_pci_ops = {
 	.set_subsystem = pci_dev_set_subsystem,
 };
@@ -246,7 +206,6 @@ static struct device_operations gma_func0_ops = {
 	.acpi_fill_ssdt		= gma_generate_ssdt,
 	.init			= gma_func0_init,
 	.ops_pci		= &gma_pci_ops,
-	.write_acpi_tables	= gma_write_acpi_tables,
 };
 
 static const unsigned short pci_device_ids[] = {
diff --git a/src/northbridge/intel/pineview/gma.c b/src/northbridge/intel/pineview/gma.c
index b0ecfe1d64..e2d0d18bad 100644
--- a/src/northbridge/intel/pineview/gma.c
+++ b/src/northbridge/intel/pineview/gma.c
@@ -12,8 +12,6 @@
 #include <drivers/intel/gma/intel_bios.h>
 #include <drivers/intel/gma/i915.h>
 #include <drivers/intel/gma/opregion.h>
-#include <southbridge/intel/i82801gx/nvs.h>
-#include <cbmem.h>
 #include <pc80/vga.h>
 #include <pc80/vga_io.h>
 #include <types.h>
@@ -42,19 +40,6 @@
 static struct resource *gtt_res  = NULL;
 static struct resource *mmio_res = NULL;
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static int gtt_setup(u8 *mmiobase)
 {
 	u32 gttbase;
@@ -235,6 +220,8 @@ static void gma_func0_init(struct device *dev)
 {
 	u32 reg32;
 
+	intel_gma_init_igd_opregion();
+
 	/* IGD needs to be Bus Master */
 	reg32 = pci_read_config32(dev, PCI_COMMAND);
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
@@ -273,33 +260,6 @@ static void gma_func0_init(struct device *dev)
 		/* Linux relies on VBT for panel info.  */
 		generate_fake_intel_oprom(&conf->gfx, dev, "$VBT PINEVIEW");
 	}
-
-	intel_gma_restore_opregion();
-}
-
-static unsigned long gma_write_acpi_tables(const struct device *const dev,
-					   unsigned long current,
-					   struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
 }
 
 static const char *gma_acpi_name(const struct device *dev)
@@ -318,7 +278,6 @@ static struct device_operations gma_func0_ops = {
 	.init                   = gma_func0_init,
 	.ops_pci                = &gma_pci_ops,
 	.acpi_name              = gma_acpi_name,
-	.write_acpi_tables      = gma_write_acpi_tables,
 };
 
 static const unsigned short pci_device_ids[] =
diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c
index 9ff68d1e7d..82e43fc575 100644
--- a/src/northbridge/intel/sandybridge/gma.c
+++ b/src/northbridge/intel/sandybridge/gma.c
@@ -10,10 +10,8 @@
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
 #include <drivers/intel/gma/libgfxinit.h>
-#include <southbridge/intel/bd82x6x/nvs.h>
 #include <drivers/intel/gma/opregion.h>
 #include <southbridge/intel/bd82x6x/pch.h>
-#include <cbmem.h>
 #include <types.h>
 
 #include "chip.h"
@@ -302,19 +300,6 @@ int gtt_poll(u32 reg, u32 mask, u32 value)
 	return 0;
 }
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static void gma_pm_init_pre_vbios(struct device *dev)
 {
 	u32 reg32;
@@ -602,6 +587,8 @@ static void gma_func0_init(struct device *dev)
 {
 	u32 reg32;
 
+	intel_gma_init_igd_opregion();
+
 	/* IGD needs to be Bus Master */
 	reg32 = pci_read_config32(dev, PCI_COMMAND);
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
@@ -636,7 +623,6 @@ static void gma_func0_init(struct device *dev)
 	}
 
 	gma_enable_swsci();
-	intel_gma_restore_opregion();
 }
 
 static void gma_generate_ssdt(const struct device *device)
@@ -646,31 +632,6 @@ static void gma_generate_ssdt(const struct device *device)
 	drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
 }
 
-static unsigned long gma_write_acpi_tables(const struct device *const dev,
-					   unsigned long current,
-					   struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
-}
-
 static const char *gma_acpi_name(const struct device *dev)
 {
 	return "GFX0";
@@ -702,7 +663,6 @@ static struct device_operations gma_func0_ops = {
 	.disable                = gma_func0_disable,
 	.ops_pci                = &gma_pci_ops,
 	.acpi_name              = gma_acpi_name,
-	.write_acpi_tables      = gma_write_acpi_tables,
 };
 
 static const unsigned short pci_device_ids[] = {
diff --git a/src/northbridge/intel/x4x/gma.c b/src/northbridge/intel/x4x/gma.c
index 0067d71bbc..004960fd8c 100644
--- a/src/northbridge/intel/x4x/gma.c
+++ b/src/northbridge/intel/x4x/gma.c
@@ -6,7 +6,6 @@
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
 #include <commonlib/helpers.h>
-#include <cbmem.h>
 #include <drivers/intel/gma/intel_bios.h>
 #include <drivers/intel/gma/edid.h>
 #include <drivers/intel/gma/i915.h>
@@ -19,31 +18,14 @@
 #include "drivers/intel/gma/i915_reg.h"
 #include "x4x.h"
 
-#if CONFIG(SOUTHBRIDGE_INTEL_I82801JX)
-#include <southbridge/intel/i82801jx/nvs.h>
-#elif CONFIG(SOUTHBRIDGE_INTEL_I82801GX)
-#include <southbridge/intel/i82801gx/nvs.h>
-#endif
-
 #define BASE_FREQUENCY 96000
 
-uintptr_t gma_get_gnvs_aslb(const void *gnvs)
-{
-	const global_nvs_t *gnvs_ptr = gnvs;
-	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
-}
-
-void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
-{
-	global_nvs_t *gnvs_ptr = gnvs;
-	if (gnvs_ptr)
-		gnvs_ptr->aslb = aslb;
-}
-
 static void gma_func0_init(struct device *dev)
 {
 	u32 reg32;
 
+	intel_gma_init_igd_opregion();
+
 	/* IGD needs to be Bus Master */
 	reg32 = pci_read_config32(dev, PCI_COMMAND);
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
@@ -65,8 +47,6 @@ static void gma_func0_init(struct device *dev)
 	} else {
 		pci_dev_init(dev);
 	}
-
-	intel_gma_restore_opregion();
 }
 
 static void gma_func0_disable(struct device *dev)
@@ -86,32 +66,6 @@ static void gma_generate_ssdt(const struct device *device)
 	drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
 }
 
-static unsigned long
-gma_write_acpi_tables(const struct device *const dev,
-		      unsigned long current,
-		      struct acpi_rsdp *const rsdp)
-{
-	igd_opregion_t *opregion = (igd_opregion_t *)current;
-	global_nvs_t *gnvs;
-
-	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
-		return current;
-
-	current += sizeof(igd_opregion_t);
-
-	/* GNVS has been already set up */
-	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
-	if (gnvs) {
-		/* IGD OpRegion Base Address */
-		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
-	} else {
-		printk(BIOS_ERR, "Error: GNVS table not found.\n");
-	}
-
-	current = acpi_align_current(current);
-	return current;
-}
-
 static const char *gma_acpi_name(const struct device *dev)
 {
 	return "GFX0";
@@ -130,7 +84,6 @@ static struct device_operations gma_func0_ops = {
 	.ops_pci		= &gma_pci_ops,
 	.disable		= gma_func0_disable,
 	.acpi_name		= gma_acpi_name,
-	.write_acpi_tables	= gma_write_acpi_tables,
 };
 
 static const unsigned short pci_device_ids[] = {