Update: A06 suspend to ram is working now
It came all of a sudden:
root@devterm /home/yatli # echo deep > /sys/power/mem_sleep
root@devterm /home/yatli # systemctl suspend
root@devterm /home/yatli # [ 142.858134] ieee80211 phy1: brcmf_c_set_cur_etheraddr: Setting cur_etheraddr failed, -52
[ 143.659868] PM: suspend entry (deep)
[ 144.323921] Filesystems sync: 0.663 seconds
[ 144.326770] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 144.329443] OOM killer disabled.
[ 144.329448] Freezing remaining freezable tasks ... (elapsed 0.008 seconds) done.
[ 144.683196] vcc3v0_sd: Entering suspend 3, disabling forcibly, was off
[ 144.703933] PM: suspend devices took 0.370 seconds
[ 144.714154] Disabling non-boot CPUs ...
[ 144.718663] psci: CPU1 killed (polled 0 ms)
[ 144.725029] psci: CPU2 killed (polled 0 ms)
[ 144.730276] psci: CPU3 killed (polled 0 ms)
[ 144.733667] psci: CPU4 killed (polled 0 ms)
[ 144.737570] psci: CPU5 killed (polled 0 ms)
[ 144.740211] Enabling non-boot CPUs ...
[ 144.742010] Detected VIPT I-cache on CPU1
[ 144.742501] cacheinfo: Unable to detect cache hierarchy for CPU 1
[ 144.743063] GICv3: CPU1: found redistributor 1 region 0:0x00000000fef20000
[ 144.743773] CPU1: Booted secondary processor 0x0000000001 [0x410fd034]
[ 144.745599] CPU1 is up
[ 144.747228] Detected VIPT I-cache on CPU2
[ 144.747716] cacheinfo: Unable to detect cache hierarchy for CPU 2
[ 144.748280] GICv3: CPU2: found redistributor 2 region 0:0x00000000fef40000
[ 144.748991] CPU2: Booted secondary processor 0x0000000002 [0x410fd034]
[ 144.751225] CPU2 is up
[ 144.753040] Detected VIPT I-cache on CPU3
[ 144.753527] cacheinfo: Unable to detect cache hierarchy for CPU 3
[ 144.754093] GICv3: CPU3: found redistributor 3 region 0:0x00000000fef60000
[ 144.754802] CPU3: Booted secondary processor 0x0000000003 [0x410fd034]
[ 144.757380] CPU3 is up
[ 144.758884] Detected PIPT I-cache on CPU4
[ 144.759276] cacheinfo: Unable to detect cache hierarchy for CPU 4
[ 144.759816] GICv3: CPU4: found redistributor 100 region 0:0x00000000fef80000
[ 144.760469] CPU4: Booted secondary processor 0x0000000100 [0x410fd082]
[ 144.762106] CPU4 is up
[ 144.763847] Detected PIPT I-cache on CPU5
[ 144.764240] cacheinfo: Unable to detect cache hierarchy for CPU 5
[ 144.764781] GICv3: CPU5: found redistributor 101 region 0:0x00000000fefa0000
[ 144.765435] CPU5: Booted secondary processor 0x0000000101 [0x410fd082]
[ 144.767197] CPU5 is up
[ 144.800804] mmc_host mmc0: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div = 0)
[ 144.924634] mmc_host mmc0: Bus speed (slot 0) = 148500000Hz (slot req 150000000Hz, actual 148500000HZ div = 0)
[ 145.083884] dwmmc_rockchip fe310000.mmc: Successfully tuned phase to 163
[ 145.100106] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43456-sdio for chip BCM4345/9
[ 145.198980] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43456-sdio for chip BCM4345/9
[ 145.200061] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available
[ 145.201675] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/9 wl0: Feb 11 2020 11:54:51 version 7.45.96.61 (be7af2d@shgit) (r745790) FWID 01-a41d86bd es7.c5.n4.a3
[ 145.345189] PM: resume devices took 0.570 seconds
[ 145.345658] OOM killer enabled.
[ 145.345944] Restarting tasks ... done.
[ 145.358887] mmc_host mmc1: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div = 0)
[ 145.367441] random: crng reseeded on system resumption
[ 145.369686] PM: suspend exit
[ 145.396920] mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 50000000Hz, actual 50000000HZ div = 0)
[ 145.988587] ieee80211 phy2: brcmf_c_set_cur_etheraddr: Setting cur_etheraddr failed, -52
[ 152.074573] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 209.960390] systemd-journald[316]: Time jumped backwards, rotating.
I will document the process later.
