[XS] Change in coreboot[main]: lenovo/haswell: enable ONBOARD_VGA_IS_PRIMARY

[Nico Huber (Code Review)]

Nico Huber has submitted this change. ( https://review.coreboot.org/c/coreboot/+/81645?usp=email )

Change subject: lenovo/haswell: enable ONBOARD_VGA_IS_PRIMARY
......................................................................

lenovo/haswell: enable ONBOARD_VGA_IS_PRIMARY

Haswell ThinkPads have Nvidia Optimus wired in on some models.
With recent coreboot changes, legacy VGA decode is now disabled
on the iGPU, and the iGPU itself is disabled, when a dGPU is
present. This is a problem on Optimus laptops, because it means
that the Intel GPU would be effectively disabled, when it is the
one that has to handle the framebuffer.

On these boards, you can enable ONBOARD_VGA_IS_PRIMARY so that
coreboot does not disable the iGPU. This is because on Optimus
laptops, the Nvidia GPU is only used for offloaded rendering.

Enable ONBOARD_VGA_IS_PRIMARY by default on these boards.

Change-Id: I8f1e0ca2861d1cc9a9ad41e7c9257aeca1a62a31
Signed-off-by: Leah Rowe 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81645
Reviewed-by: Nico Huber 
Reviewed-by: Angel Pons 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/lenovo/haswell/Kconfig
1 file changed, 4 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, but someone else must approve
  Nico Huber: Looks good to me, approved

diff --git a/src/mainboard/lenovo/haswell/Kconfig b/src/mainboard/lenovo/haswell/Kconfig
index b874452..a5c8054 100644
--- a/src/mainboard/lenovo/haswell/Kconfig
+++ b/src/mainboard/lenovo/haswell/Kconfig
@@ -60,6 +60,10 @@
    default "ThinkPad T440p" if BOARD_LENOVO_THINKPAD_T440P
    default "ThinkPad W541" if BOARD_LENOVO_THINKPAD_W541

+config ONBOARD_VGA_IS_PRIMARY
+	bool
+	default y
+
 config VGA_BIOS_ID
    string
    default "8086,0416" if BOARD_LENOVO_THINKPAD_T440P