From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Jonker Subject: Re: [RFC PATCH v1 0/2] rk3318 A95X Z2 board Date: Mon, 22 Jun 2020 10:01:55 +0200 Message-ID: References: <20200620134659.4592-1-jbx6244@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20200620134659.4592-1-jbx6244-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Content-Language: en-US Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, frank.wang-TNX95d0MmH7DzftRWevZcw@public.gmane.org List-Id: linux-rockchip.vger.kernel.org Hi, BUG report 1: About phy-rockchip-inno-usb2.c and rk3318. Goal is to use ttyUSB0 as console in combination with agetty as long as we don't have a working HDMI signal on a DVI monitor. Boot with rk3318 starts normal on emmc with U-boot OK. It then loads the kernel and initrd on SD card. Log view on ttyS2 works. At the end of the init process extcon0 sends 2 events sortly after each other. usb2 crashes if extcon0 event reports 'USB=0' and 'DCP=1'. It looks like there's no consistant init (delay?) in the driver or hardware. Boot only possible with busybox + initrd with no scripts that delay event handling. (Un)plug events are unrelayable. Getty only becomes active if usb cable connected direct to the board(without usb hub). With systemd only a kernel log scroll, but never able to use ttyUSB0 as login. mdev.conf line to catch the events: extcon[0-9]+ root:root 666 */bin/cat /sys/class/extcon/extcon0/state > /dev/kmsg In extlinux.conf clk and pm must be ignored in the kernel command line to prevent a crash. label kernel kernel /Image fdt /rk3318-a95x-z2.dtb initrd /rootfs.cpio append console=ttyUSB0,115200n8 console=ttyS2,1500000n8 pd_ignore_unused clk_ignore_unused initcall_debug=1 debug drm.debug=0xe video=HDMI-A-1:1280x720@60 earlycon=uart8250,mmio32,0xff130000,keep swiotlb=1 kpti=0 no_console_suspend=1 consoleblank=0 rootwait Question: Does anyone have a solution for usb2 or was there previous discussion/info about this? Why has rk3328.dtsi incomplete (see TRM) power-domains and qos? Does that work? Was rk3318 VOP+HDMI, gmac2phy tested in Linux mainline before? Kind regards, Johan Kernel log with usb2 OK: [ 0.959594] Run /init as init process [ 0.959937] with arguments: [ 0.960210] /init [ 0.960416] with environment: [ 0.960703] HOME=/ [ 0.960917] TERM=linux [ 0.961562] process '/bin/busybox' started with executable stack [ 0.967474] usb 1-1: new full-speed USB device number 2 using dwc2 [..] [ 6.785160] USB=1 [ 6.785160] USB-HOST=0 [ 6.785160] SDP=1 [ 6.785160] CDP=0 [ 6.785160] DCP=0 [ 6.785160] SLOW-CHARGER=0 [ 6.785165] USB=1 [ 6.785165] USB-HOST=0 [ 6.785165] SDP=1 [ 6.785165] CDP=0 [ 6.785165] DCP=0 [ 6.785165] SLOW-CHARGER=0 [ 13.729625] random: crng init done [ 31.715450] vcc_host_vbus: disabling Kernel log with usb2 crash: [ 0.940666] Run /init as init process [ 0.941005] with arguments: [ 0.941280] /init [ 0.941490] with environment: [ 0.941781] HOME=/ [ 0.941999] TERM=linux [ 0.942536] process '/bin/busybox' started with executable stack [ 0.967442] usb 1-1: new full-speed USB device number 2 using dwc2 [..] [ 7.300792] USB=0 [ 7.300792] USB-HOST=0 [ 7.300792] SDP=0 [ 7.300792] CDP=0 [ 7.300792] DCP=1 [ 7.300792] SLOW-CHARGER=0