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OpenAMP_TTY_echo_wakeup examples don't work.

nlbutts
Associate II

‎2021-06-07 08:22 PM

I'm trying to test the low power modes (I don't care about the current at this point). I start the

Next I run this:

cd /usr/local/Cube-M4-examples/STM32MP157C-DK2/Applications/OpenAMP/OpenAMP_TTY_echo_wakeup
fw_cortex_m4.sh start
echo enabled > /sys/devices/platform/soc/4c001000.mailbox/power/wakeup
echo "*delay" >/dev/ttyRPMSG0
systemctl suspend

The CPU never goes into CStop mode. DMESG reports the following:

[ 4665.621976] unbind driver hci_uart
[ 4665.884144] PM: suspend entry (deep)
[ 4665.900196] Filesystems sync: 0.013 seconds
[ 4665.905556] Freezing user space processes ... (elapsed 0.001 seconds) done.
[ 4665.913002] OOM killer disabled.
[ 4665.915975] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 4665.923519] printk: Suspending console(s) (use no_console_suspend to debug)
[ 4665.933455] dwc2 49000000.usb-otg: suspending usb gadget configfs-gadget
[ 4666.063929] stm32-dwmac 5800a000.ethernet eth0: Link is Down
[ 4666.065574] stm32-dwmac 5800a000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 4666.065652] stm32-dwmac 5800a000.ethernet eth0: Link is Down
[ 4666.071261] stm32-dma 48001000.dma-controller: Suspend is prevented by Chan 1
[ 4666.071292] PM: dpm_run_callback(): platform_pm_suspend+0x0/0x48 returns -16
[ 4666.071304] PM: Device 48001000.dma-controller failed to suspend: error -16
[ 4666.071316] PM: Some devices failed to suspend, or early wake event detected
[ 4666.072871] stm32-dwmac 5800a000.ethernet eth0: configuring for phy/rgmii-id link mode
[ 4666.081211] dwmac4: Master AXI performs any burst length
[ 4666.081247] stm32-dwmac 5800a000.ethernet eth0: No Safety Features support found
[ 4666.085750] dwc2 49000000.usb-otg: resuming usb gadget configfs-gadget
[ 4666.138055] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[ 4666.139515] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 4666.140967] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 4666.143633] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[ 4666.145089] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 4666.147405] mmc1: queuing unknown CIS tuple 0x80 (6 bytes)
[ 4666.235444] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1
[ 4666.391516] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1
[ 4666.431521] usb 2-1: reset high-speed USB device number 2 using ehci-platform
[ 4666.461515] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43430/1 wl0: Feb 16 2020 22:39:24 version 7.45.98.97 (r724416 CY) FWID 01-bf41ed64
[ 4666.903526] OOM killer enabled.
[ 4666.906582] Restarting tasks ... done.
[ 4666.952002] PM: suspend exit
[ 4667.162895] bind driver hci_uart
[ 4667.189618] Bluetooth: HCI UART driver ver 2.3
[ 4667.192704] Bluetooth: HCI UART protocol H4 registered
[ 4667.198263] Bluetooth: HCI UART protocol Broadcom registered
[ 4667.562224] Bluetooth: hci0: BCM: chip id 94
[ 4667.565518] Bluetooth: hci0: BCM: features 0x2e
[ 4667.570857] Bluetooth: hci0: BCM43430A1
[ 4667.573543] Bluetooth: hci0: BCM43430A1 (001.002.009) build 0000
[ 4667.579687] Bluetooth: hci0: BCM43430A1 'brcm/BCM43430A1.hcd' Patch
[ 4668.193368] Bluetooth: hci0: BCM4343WA1 37.4MHz Murata Type-1DX BT4.2-0093
[ 4668.198817] Bluetooth: hci0: BCM43430A1 (001.002.009) build 0395
[ 4670.205363] stm32-dwmac 5800a000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx

Any ideas how to get th eDMA controller from preventing the A7 from going into CStop mode?

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Olivier GALLIEN
ST Employee

‎2021-06-11 07:04 AM

Hi @nlbutts​ ,

It seems you forgot to select the right Linux boot mode : 

Select the boot mode                                                                           
 1:   OpenSTLinux                                                                            
 2:   stm32mp157f-ev1-a7-examples                                                                    
 3:   stm32mp157f-ev1-m4-examples

Take care to select choice "3 stm32mp157f-ev1-m4-examples", else resource are not properly assigned to each core to support the use case.

Olivier

Olivier GALLIEN
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