diff options
| author | Chris Morgan <macromorgan@hotmail.com> | 2020-02-07 09:40:42 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-06 07:54:26 +0000 |
| commit | 5e5e789f9b115f7fb1e7c453cdf20df088ac893d (patch) | |
| tree | 0b4a2bd0c1658ed770485947b468073450345ae0 /Documentation/mainboard | |
| parent | efc4be6bf1b132f8d280b7b840049ea6677405d3 (diff) | |
nb/intel/haswell/peg: Add PEG driver stub
This is a port of https://review.coreboot.org/c/coreboot/+/22337 to the
Haswell northbridge. This code is necessary to support the dGPU of the
t440p. Code was cut and pasted from Sandy Bridge with vendor IDs updated
to the correct Haswell values. Tested on t440p with dGPU on Ubuntu
18.04.4 with 5.3.0-28 kernel. Without patches dmesg reports Nouveau is
unable to read the VBIOS of the dGPU as it has an invalid checksum (I
checked that the ROM in CBFS is correct). With this patch DRM works
correctly with both the Nouveau driver and the Nvidia proprietary
driver. Windows 10 1909 also tested but generates bluescreen once GPU
driver is loaded.
Change-Id: Ie5f089fb6fd774e6c61f4f9281e2945bd44edf27
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38743
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'Documentation/mainboard')
| -rw-r--r-- | Documentation/mainboard/lenovo/t440p.md | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/Documentation/mainboard/lenovo/t440p.md b/Documentation/mainboard/lenovo/t440p.md index 98c1da54ac..fb0187075c 100644 --- a/Documentation/mainboard/lenovo/t440p.md +++ b/Documentation/mainboard/lenovo/t440p.md @@ -36,10 +36,7 @@ the laptop able to power on. - Cannot get the mainboard serial number from the mainboard: the OEM UEFI firmware gets the serial number from an "emulated EEPROM" via I/O port 0x1630/0x1634, but it's still unknown how to make it work - -## Untested - -- the dGPU model +- The dGPU does not currently work in Windows. ## Working @@ -61,6 +58,7 @@ the laptop able to power on. - CMOS options: wlan, trackpoint, fn_ctrl_swap - internal flashing when IFD is unlocked - using `me_cleaner` +- dGPU (must be enabled in CMOS options) [Lenovo ThinkPad T440p]: https://pcsupport.lenovo.com/us/zh/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t440p [Hardware Maintenance Manual]: https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t440p_hmm_en_sp40a25467_04.pdf |