mb/google/poppy: add libgfxinit support for variants

Add libgfxinit support for Nami, Nautilus, and Soraka. Panel timing
values taken from default panel selection extracted from the
respective VBTs.

TEST=build/boot nami w/edk2 payload and libgfxinit selected

Change-Id: If0ca389487338c47f9d8de990acf591c6907eaa9
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77268
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/poppy/Kconfig

@@ -47,6 +47,7 @@ config BOARD_GOOGLE_NAMI
 	select DRIVERS_SPI_ACPI
 	select EXCLUDE_NATIVE_SD_INTERFACE
 	select INTEL_GMA_HAVE_VBT
+	select MAINBOARD_HAS_LIBGFXINIT
 	select SPI_TPM
 	select SYSTEM_TYPE_LAPTOP
 
@@ -57,6 +58,7 @@ config BOARD_GOOGLE_NAUTILUS
 	select DRIVERS_I2C_DA7219
 	select I2C_TPM
 	select INTEL_GMA_HAVE_VBT
+	select MAINBOARD_HAS_LIBGFXINIT
 	select SYSTEM_TYPE_CONVERTIBLE
 	select VARIANT_HAS_CAMERA_ACPI
 
@@ -93,6 +95,7 @@ config BOARD_GOOGLE_SORAKA
 	select DRIVERS_I2C_MAX98927
 	select I2C_TPM
 	select INTEL_GMA_HAVE_VBT
+	select MAINBOARD_HAS_LIBGFXINIT
 	select NO_FADT_8042
 	select SYSTEM_TYPE_DETACHABLE
 	select VARIANT_HAS_CAMERA_ACPI

src/mainboard/google/poppy/variants/nami/devicetree.cb

@@ -3,6 +3,15 @@ chip soc/intel/skylake
 	# IGD Displays
 	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
 
+	register "panel_cfg" = "{
+		.up_delay_ms		=  100,
+		.down_delay_ms		=  500,
+		.cycle_delay_ms		=  500,
+		.backlight_on_delay_ms	=    1,
+		.backlight_off_delay_ms	=  200,
+		.backlight_pwm_hz	= 1000,
+	}"
+
 	# Deep Sx states
 	register "deep_s3_enable_ac" = "0"
 	register "deep_s3_enable_dc" = "1"

src/mainboard/google/poppy/variants/nautilus/devicetree.cb

@@ -3,6 +3,15 @@ chip soc/intel/skylake
 	# IGD Displays
 	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
 
+	register "panel_cfg" = "{
+		.up_delay_ms		=  100,
+		.down_delay_ms		=  500,
+		.cycle_delay_ms		=  500,
+		.backlight_on_delay_ms	=    1,
+		.backlight_off_delay_ms	=  200,
+		.backlight_pwm_hz	= 1000,
+	}"
+
 	# Deep Sx states
 	register "deep_s3_enable_ac" = "0"
 	register "deep_s3_enable_dc" = "0"

src/mainboard/google/poppy/variants/soraka/devicetree.cb

@@ -3,6 +3,15 @@ chip soc/intel/skylake
 	# IGD Displays
 	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
 
+	register "panel_cfg" = "{
+		.up_delay_ms		=  100,
+		.down_delay_ms		=  500,
+		.cycle_delay_ms		=  500,
+		.backlight_on_delay_ms	=    1,
+		.backlight_off_delay_ms	=  200,
+		.backlight_pwm_hz	= 1000,
+	}"
+
 	# Deep Sx states
 	register "deep_s3_enable_ac" = "0"
 	register "deep_s3_enable_dc" = "0"