drivers/intel/gma/acpi: Add Kconfigs for backlight registers
Instead of adding more versions of the `*pch.asl`, unify the existing
ones and allow to override the register locations via Kconfig. The
current defaults should work for Skylake and some newer platforms.
TEST=Booted ThinkPad X201s, backlight control still works.
Change-Id: I0b21d9a0288f0f8d6cb0a4776909bffdae7576f5
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31503
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-by: Benjamin Doron <benjamin.doron00@gmail.com>
diff --git a/src/drivers/intel/gma/acpi/gma.asl b/src/drivers/intel/gma/acpi/gma.asl
new file mode 100644
index 0000000..57563933
--- /dev/null
+++ b/src/drivers/intel/gma/acpi/gma.asl
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+Device (GFX0)
+{
+ Name (_ADR, 0x00020000)
+
+ OperationRegion (GFXC, PCI_Config, 0x00, 0x0100)
+ Field (GFXC, DWordAcc, NoLock, Preserve)
+ {
+ Offset (0x10),
+ BAR0, 64,
+ Offset (0xe4),
+ ASLE, 32,
+ Offset (0xfc),
+ ASLS, 32,
+ }
+
+ OperationRegion (GFRG, SystemMemory, And (BAR0, 0xfffffffffffffff0), 0x400000)
+ Field (GFRG, DWordAcc, NoLock, Preserve)
+ {
+ Offset (CONFIG_INTEL_GMA_BCLV_OFFSET),
+ BCLV, CONFIG_INTEL_GMA_BCLV_WIDTH,
+ Offset (CONFIG_INTEL_GMA_BCLM_OFFSET),
+ BCLM, CONFIG_INTEL_GMA_BCLM_WIDTH
+ }
+
+#include "configure_brightness_levels.asl"
+#include "common.asl"
+}