soc/intel/baytrail: add ACPI backlight support
Add hook to generate ACPI methods in SSDT for screen backlight control.
To make use of this, individual boards will need to
include default_brightness_levels.asl in their dsdt, as
well as add 'register "gfx" = "GMA_STATIC_DISPLAYS(0)"' to
their devicetree.
Change-Id: I0b7fc45bda3aaf89306bedb579fb1e9f8ce07926
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39942
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/soc/intel/baytrail/gfx.c b/src/soc/intel/baytrail/gfx.c
index 417f36e..e4ed6f3 100644
--- a/src/soc/intel/baytrail/gfx.c
+++ b/src/soc/intel/baytrail/gfx.c
@@ -397,6 +397,13 @@
intel_gma_restore_opregion();
}
+static void gma_generate_ssdt(struct device *dev)
+{
+ const struct soc_intel_baytrail_config *chip = dev->chip_info;
+
+ drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
+}
+
static unsigned long
gma_write_acpi_tables(struct device *const dev,
unsigned long current,
@@ -430,6 +437,7 @@
.init = gfx_init,
.ops_pci = &soc_pci_ops,
.write_acpi_tables = gma_write_acpi_tables,
+ .acpi_fill_ssdt = gma_generate_ssdt,
};
static const struct pci_driver gfx_driver __pci_driver = {