mbox series

[0/2,SRU,OEM-OSP1-B] CPU package state stuck at PC3 with nvidia dGPU in power saving mode

Message ID 20200226091954.20764-1-acelan.kao@canonical.com
Headers show
Series CPU package state stuck at PC3 with nvidia dGPU in power saving mode | expand

Message

AceLan Kao Feb. 26, 2020, 9:19 a.m. UTC 
BugLibk: https://bugs.launchpad.net/bugs/1864606

[Impact]
On a certain Dell laptop which comes with nvidia dGPU, the CPU package
state stuck at PC3 in power saving mode(uses iGPU)

[Fix]
It requires below commit(from v5.3-rc1) for runtime pm to work, and to
avoid conflict, have to introduce another refactor commit.
   d4a4f927e4dd i2c: nvidia-gpu: add runtime pm support
   cb7302fbe365 i2c: nvidia-gpu: refactor master_xfer

[Test]
Verified on the target laptop, it enters PC10 during long idle.

[Regression Potential]
Low, the commit simply adds runtime pm support.

Ajay Gupta (2):
  i2c: nvidia-gpu: refactor master_xfer
  i2c: nvidia-gpu: add runtime pm support

 drivers/i2c/busses/i2c-nvidia-gpu.c | 50 +++++++++++++++++++++--------
 1 file changed, 37 insertions(+), 13 deletions(-)