soc/intel/alderlake: Hook up GMA ACPI brightness controls
Add function needed to generate ACPI backlight control SSDT, along with
Kconfig values for accessing the registers.
Tested by adding gfx register on system76/lemp11. Backlight controls
work on Windows 10 and Linux 6.1.
Change-Id: I1cc33bf0121ff44aea68a7e3615c5e58e2ab6ce2
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69076
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index cbc02e7..08d4132 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -484,4 +484,16 @@
help
Set this option if debug build of FSP is used.
+config INTEL_GMA_BCLV_OFFSET
+ default 0xc8258
+
+config INTEL_GMA_BCLV_WIDTH
+ default 32
+
+config INTEL_GMA_BCLM_OFFSET
+ default 0xc8254
+
+config INTEL_GMA_BCLM_WIDTH
+ default 32
+
endif