soc/intel/common: Hook up GMA ACPI brightness controls

Add framework to hook up the generic src/drivers/intel/gma ACPI
backlight control for platforms using SOC_INTEL_COMMON_BLOCK_GRAPHICS.
Add a weak function to get the struct i915_gpu_controller_info needed
to generate the SSDT, defaulting to NULL, which SoC's will override.

Each SoC will need to override intel_igd_get_controller_info, and
individual boards will need to populate the struct in order for
the backlight control methods to be added to the SSDT.

Change-Id: I993770fdcd0a28cee756df2bd6a795498f175952
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32549
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/include/intelblocks/graphics.h b/src/soc/intel/common/block/include/intelblocks/graphics.h
index 8e98228424..153f9d8184 100644
--- a/src/soc/intel/common/block/include/intelblocks/graphics.h
+++ b/src/soc/intel/common/block/include/intelblocks/graphics.h
@@ -44,6 +44,10 @@ void graphics_soc_init(struct device *dev);
 uintptr_t graphics_soc_write_acpi_opregion(struct device *device,
 		uintptr_t current, struct acpi_rsdp *rsdp);
 
+/* i915 controller info for ACPI backlight controls */
+const struct i915_gpu_controller_info *
+intel_igd_get_controller_info(struct device *device);
+
 /* Graphics MMIO register read/write APIs */
 uint32_t graphics_gtt_read(unsigned long reg);
 void graphics_gtt_write(unsigned long reg, uint32_t data);