APPLIED Re: [PATCH 0/3][SRU][OEM-5.14] Add s0i3 RTC wake up for AMD systems

[Timo Aaltonen]

On 5.11.2021 22.49, Alex Hung wrote:
> BugLink: https://bugs.launchpad.net/bugs/1950013
> 
> [Impact]
> 
>    RTC based wakeup is not supported natively by the hardware for
>    s0i3.
> 
> [Fix]
> 
>    A firmware and driver updates were implemented. The driver
>    passes wakeup time to SMU to to enable RTC from S0i3.
> 
>    Note this s0i3 RTC wake up also requires new firmware.
> 
>    The first patch is the prerequisite actual fix (patch 2 and 3).
> 
> [Test]
> 
>    This is requested by AMD and tested by an AMD developer as below:
> 
> 	Testing a suspend run with RTC for 15 seconds and then 30 seconds:
> 	```
> 	$ sudo rtcwake --seconds 15 -m mem
> 	rtcwake: assuming RTC uses UTC ...
> 	rtcwake: wakeup from "mem" using /dev/rtc0 at Fri Nov 5 02:31:45 2021
> 	$ sudo rtcwake --seconds 30 -m mem
> 	rtcwake: assuming RTC uses UTC ...
> 	rtcwake: wakeup from "mem" using /dev/rtc0 at Fri Nov 5 02:33:13 2021
> 	$ sudo cat /sys/kernel/debug/amd_pmc/s0ix_stats
> 	=== S0ix statistics ===
> 	S0ix Entry Time: 4793618285
> 	S0ix Exit Time: 6209036738
> 	Residency Time: 29487884
> 	```
> 	Residency divided by 1000000 is 29.4 seconds.
> 
> 	Reading idle mask works fine too.
> 
> [Where problems could occur]
> 
>    Low risk.
> 
>    First patch only exports Idlemask value.
>    The actual fix only affects a specific AMD CPU (CZN).
> 
> Mario Limonciello (2):
>    platform/x86: amd-pmc: adjust arguments for `amd_pmc_send_cmd`
>    platform/x86: amd-pmc: Add special handling for timer based S0i3
>      wakeup
> 
> Sanket Goswami (1):
>    platform/x86: amd-pmc: Export Idlemask values based on the APU
> 
>   drivers/platform/x86/amd-pmc.c | 142 ++++++++++++++++++++++++++++++++-
>   1 file changed, 138 insertions(+), 4 deletions(-)
> 

applied to oem-5.14, thanks


-- 
t