[Bug 1685691] [NEW] [Feature] GLK:S0iX Enabling

quanxian quanxian.wang at intel.com
Mon Apr 24 03:16:31 UTC 2017


Public bug reported:

S0ix-states represent the residency in the Intel® SoC idle standby power states.
The S0ix states shut off part of the SoC when they are not in use. The S0ix
states are triggered when specific conditions within the SoC have been achieved,
for example: certain components are in low power states. The SoC consumes the
least amount of power in the deepest (for example, S0i3) state.
GLK S0ix is triggered by two paths:
(1) by system PM, e.g "suspend-to-idle" triggered by pressing the power button
on Android device or command manually triggered on any Linux based distros;
(2) by runtime PM, i.e no system activities with display off.
S0ix should simply work in theory with trigger path (1) if we have the device
drivers ready. On GLK, we require the below PCI device drivers with system PM
support. ACPI device requirements are WIP.
 I2C designware PCI driver 
 USB XHCI PCI ID 
 Intel trace Hub[NPK) PCI ID 
 SPI BXT PCI ID 
 SCSI UFS BXT PCI host ID 
 Graphics 
 Audio 
 PWM 
 HSUART 
 Security engine
S0ix with trigger path (2) require work as defined below.
 All the above device drivers need to support runtime PM (already defined in the same LCK above)
 PCI root port to support runtime PM
Both paths will require LP#1685690 [GLK] intel_idle driver support for S0ix support.
Stakeholders : CCG

Sub task:
[GLK] Runtime D3 (RTD3) Enabling
[GLK] [S0ix] Telemetry Enabling

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1685691

Title:
  [Feature] GLK:S0iX Enabling

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