Arthur Heymans (arthur@aheymans.xyz) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16354
-gerrit
commit ad06bcfbc9f6970de9fbbc3442c84223746f7e88 Author: Arthur Heymans arthur@aheymans.xyz Date: Tue Aug 30 13:42:33 2016 +0200
[UNTESTED] use correct GPIO for hybrid driver on lenovo/T400
Currently the hybrid driver uses GPIO 52 to configure mux. This is not the right GPIO on t400 according to schematics "MALIBU-3". It should be gpio22.
Previously also gpio 49 (GFX_PWR_EN) , 19 (BKLT_CTRL_SEL), 17 (DGFX_PWRGD) were configured for hybrid graphics to work on T400, but this was reverted in 14d1a93e: "Revert mainboard/lenovo/t400: Add initial hybrid graphics support". It is unknown if this is also needed.
Change-Id: I3167303abeb6b3711d53508c61a340d03b1e050a Signed-off-by: Arthur Heymans arthur@aheymans.xyz --- src/mainboard/lenovo/t400/Kconfig | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/src/mainboard/lenovo/t400/Kconfig b/src/mainboard/lenovo/t400/Kconfig index a444bf8..6ea66bd 100644 --- a/src/mainboard/lenovo/t400/Kconfig +++ b/src/mainboard/lenovo/t400/Kconfig @@ -56,4 +56,8 @@ config ONBOARD_VGA_IS_PRIMARY bool default y
+config HYBRID_GRAPHICS_GPIO_NUM + int + default 22 + endif # BOARD_LENOVO_T400