** Description changed:

  [Impact]
  System can't enter suspend on AHCI mode,
  the CPU FAN and System FAN is running, PSU LED is on.
  When fail to enter suspend, remove ODD, the system can successfully enter 
suspend again.
  
  [Fix]
  Enable LPM on Alder Lake-P AHCI.
  
  [Test Cases]
  1. enabled AHCI on target machine.
  2. boot with kernel applied fix.
- 3. suspend then check slp_s0_residency_usec
+ 3. suspend then check slp_s0_residency_usec&package_cstate_show
  ~~~
  u@ubuntu:~$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec;sudo 
cat /sys/kernel/debug/pmc_core/package_cstate_show
  4951200
  Package C2 : 63571033
  Package C3 : 6212
  Package C6 : 5633477
  Package C7 : 0
  Package C8 : 0
  Package C9 : 0
  Package C10 : 5255561
  u@ubuntu:~$ sudo rtcwake -m mem -s 10
  rtcwake: assuming RTC uses UTC ...
  rtcwake: wakeup from "mem" using /dev/rtc0
  u@ubuntu:~$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec;sudo 
cat /sys/kernel/debug/pmc_core/package_cstate_show
  12965280
  Package C2 : 75052691
  Package C3 : 46989
  Package C6 : 8108332
  Package C7 : 0
  Package C8 : 0
  Package C9 : 0
  Package C10 : 13628111
  ~~~
  
  [where the issue could happen]
  Medium, Intel promise there's no issue of ADL AHCI and
  they will take responsibility after regression.
  Intel also take LPM as POR so they will fix any issues.

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https://bugs.launchpad.net/bugs/2037493

Title:
  Fix ADL: System enabled AHCI can't get into s0ix when attached ODD

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress
Status in linux-oem-6.5 package in Ubuntu:
  New
Status in linux source package in Jammy:
  New
Status in linux-oem-6.5 source package in Jammy:
  In Progress
Status in linux source package in Lunar:
  In Progress
Status in linux-oem-6.5 source package in Lunar:
  New
Status in linux source package in Mantic:
  In Progress
Status in linux-oem-6.5 source package in Mantic:
  New

Bug description:
  [Impact]
  System can't enter suspend on AHCI mode,
  the CPU FAN and System FAN is running, PSU LED is on.
  When fail to enter suspend, remove ODD, the system can successfully enter 
suspend again.

  [Fix]
  Enable LPM on Alder Lake-P AHCI.

  [Test Cases]
  1. enabled AHCI on target machine.
  2. boot with kernel applied fix.
  3. suspend then check slp_s0_residency_usec&package_cstate_show
  ~~~
  u@ubuntu:~$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec;sudo 
cat /sys/kernel/debug/pmc_core/package_cstate_show
  4951200
  Package C2 : 63571033
  Package C3 : 6212
  Package C6 : 5633477
  Package C7 : 0
  Package C8 : 0
  Package C9 : 0
  Package C10 : 5255561
  u@ubuntu:~$ sudo rtcwake -m mem -s 10
  rtcwake: assuming RTC uses UTC ...
  rtcwake: wakeup from "mem" using /dev/rtc0
  u@ubuntu:~$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec;sudo 
cat /sys/kernel/debug/pmc_core/package_cstate_show
  12965280
  Package C2 : 75052691
  Package C3 : 46989
  Package C6 : 8108332
  Package C7 : 0
  Package C8 : 0
  Package C9 : 0
  Package C10 : 13628111
  ~~~

  [where the issue could happen]
  Medium, Intel promise there's no issue of ADL AHCI and
  they will take responsibility after regression.
  Intel also take LPM as POR so they will fix any issues.

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