diff options
| author | Marx Wang <marx.wang@intel.com> | 2020-04-07 16:58:38 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-04-14 09:57:03 +0000 |
| commit | abc17d10d6feac38cd6c5cdecab04cedfb2bccae (patch) | |
| tree | af55c7ddae9a4d0579a2622b49aba4d84240ac90 /Documentation/gfx | |
| parent | efc3d04af2f0cbf3d0afeceeadb1d1e09039047d (diff) | |
soc/intel/apollolake: Disable XHCI LFPS power management
Provide the option to disable XHCI LFPS power management.
If the option is set in the devicetree, the bits[7:4] in
XHCI MMIO BAR + offset 0x80A4 (PMCTRL_REG) will be updated
from default 9 to 0.
BUG=b:146768983
BRANCH=None
TEST=build coreboot with DisableXhciLfpsPM being set to 1 and flash
the image to the device. Run following command to check if
bits[7:4] is set 0:
>iotools mmio_read32 "XHCI MMIO BAR + 0x80A4"
Signed-off-by: Marx Wang <marx.wang@intel.com>
Change-Id: Ic603e3b919d8b443c6ede8bb5e46e2de07fcb856
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40255
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'Documentation/gfx')
0 files changed, 0 insertions, 0 deletions