[SOLVED] DragonBoard 410c linaro kernerl v4.14

Products Support DragonBoard410c
#1

Hi,

I’d like to ask how to get the linaro kernel source if it is possible.

I found the prebuilt images at the link below, and those images can provides a successful booting up process on my dragonboard 410c.
http://snapshots.linaro.org/96boards/dragonboard410c/linaro/aosp-master/latest/

Based on the linaro_android_build_cmds.sh inside, the AOSP is available so I can generate the workable system.img, vendor.img, and userdata.img by myself. However, there is no db410c-kernel/ folder in the downloaded package.

I had to follow the instructions at Building Android Open Source Project (AOSP) for Dragonboard - 96Boards to download the kernel source code for 410c. The git repo being used is http://git.linaro.org/landing-teams/working/qualcomm/kernel/.
Unfortunately, my built boot.img can not perform the same result as linaro’s prebuilt boot.img did (linaro’s boot image + my built system.img can work). I did follow the instructions to checkout the release/android/qcomlt-4.14 branch and change the deconfig inside, but it still didn’t work. The kernel crashed intermediately. The log is attached below for the information.

How can I get the kernel 4.14 for dragonboard 410c as well as the proper deconfig?
Thank you.

[ 4.020850] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 4.020875] [drm] Driver supports precise vblank timestamp query.
[ 4.027111] [drm] Initialized msm 1.2.0 20130625 for 1a00000.mdss on minor 0
[ 4.034806] [drm] Cannot find any crtc or sizes
[ 4.040847] input: gpio_keys as /devices/platform/gpio_keys/input/input2
[ 4.044416] rtc-pm8xxx 200f000.spmi:pm8916@0:rtc@6000: setting system clock to 1970-01-01 01:57:10 UTC (7030)
[ 4.051327] ALSA device list:▒[ 4.066136] Freeing unused kernel memory: 3136K
[ 4.072323] init: init first stage started!
[ 4.072822] init: [libfs_mgr]ReadFstabFromDt(): failed to read fstab from dt
[ 4.075756] init: [libfs_mgr]ReadDefaultFstab(): failed to find device default fstab
[ 4.082651] init: Failed to fstab for first stage mount
[ 4.090469] init: Using Android DT directory /proc/device-tree/firmware/android/
[ 4.095900] init: [libfs_mgr]ReadDefaultFstab(): failed to find device default fstab
[ 4.098352] usb 1-1: New USB device found, idVendor=0424, idProduct=2513
[ 4.098360] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 4.099181] hub 1-1:1.0: USB hub found
[ 4.099379] hub 1-1:1.0: 3 ports detected
[ 4.128189] init: First stage mount skipped (missing/incompatible/empty fstab in device tree)
[ 4.132210] init: Skipped setting INIT_AVB_VERSION (not in recovery mode)
[ 4.140731] init: execv("/system/bin/init") failed: No such file or directory
[ 4.205957] init: #00 pc 000b0180 /init (UnwindStackCurrent::UnwindFromContext(unsigned int, void*)+88)
[ 4.206028] init: #01 pc 00054f0f /init (android::init::InitFatalReboot()+54)
[ 4.214557] init: #02 pc 00056963 /init (android::init::InitAborter(char const*)+22)
[ 4.221576] init: #03 pc 0007d73f /init (android::base::LogMessage::~LogMessage()+406)
[ 4.229475] init: #04 pc 0004f853 /init (android::init::FirstStageMain(int, char**)+3538)
[ 4.237287] init: #05 pc 000f5413 /init (__real_libc_init(void*, void ()(), int ()(int, char**, char**), structors_array_t const*, bionic_tcb*)+386)
[ 4.245622] init: #06 pc 000f528b /init (__libc_init+38)
[ 4.259066] init: #07 pc 0004c02d /init (_start_main+32)
[ 4.264612] init: Reboot ending, jumping to kernel
[ 4.270239] remoteproc remoteproc0: powering up a204000.wcnss
[ 4.274769] remoteproc remoteproc0: Direct firmware load for wcnss.mdt failed with error -2
[ 4.280510] remoteproc remoteproc0: Falling back to user helper
[ 4.288705] ------------[ cut here ]------------
[ 4.294543] WARNING: CPU: 0 PID: 1529 at drivers/base/firmware_class.c:1092 _request_firmware+0x60c/0x768
[ 4.299398] Modules linked in:
[ 4.308855] CPU: 0 PID: 1529 Comm: kworker/0:4 Not tainted 4.14.61-dirty #1
[ 4.311808] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[ 4.318673] Workqueue: events request_firmware_work_func
[ 4.325609] task: ffff80003d4ae580 task.stack: ffff00000c860000
[ 4.330905] PC is at _request_firmware+0x60c/0x768
[ 4.336547] LR is at _request_firmware+0x604/0x768
[ 4.341407] pc : [] lr : [] pstate: 20400005
[ 4.346183] sp : ffff00000c863c20
[ 4.353730] x29: ffff00000c863c20 x28: 00000000fffffff5
[ 4.356944] x27: ffff000009596000 x26: ffff000008e1bee8
[ 4.362326] x25: ffff80003c585838 x24: 0000000000000005
[ 4.367621] x23: 00000000000000fa x22: ffff00000c863d60
[ 4.372916] x21: ffff80003c075800 x20: ffff00000951a000
[ 4.378211] x19: ffff80003d089280 x18: ffff00000951af88
[ 4.383506] x17: 0000000000000000 x16: 0000000000000000
[ 4.388802] x15: ffff00008966054f x14: 0000000000000006
[ 4.394096] x13: ffff00000966055d x12: ffff00000953e6e0
[ 4.399392] x11: ffff00000953e000 x10: 0000000005f5e0ff
[ 4.404687] x9 : ffff00000c863830 x8 : 6c65682072657375
[ 4.409982] x7 : ffff000008400b80 x6 : 00000000000001c4
[ 4.415277] x5 : 0000000000000000 x4 : 0000000000000000
[ 4.420572] x3 : ffff00000953ab78 x2 : 7403634da9586600
[ 4.425867] x1 : 0000000000000000 x0 : 00000000fffffff5
[ 4.431163] Call trace:
[ 4.436457] Exception stack(0xffff00000c863ae0 to 0xffff00000c863c20)
[ 4.438635] 3ae0: 00000000fffffff5 0000000000000000 7403634da9586600 ffff00000953ab78
[ 4.445233] 3b00: 0000000000000000 0000000000000000 00000000000001c4 ffff000008400b80
[ 4.453046] 3b20: 6c65682072657375 ffff00000c863830 0000000005f5e0ff ffff00000953e000
[ 4.460857] 3b40: ffff00000953e6e0 ffff00000966055d 0000000000000006 ffff00008966054f
[ 4.468670] 3b60: 0000000000000000 0000000000000000 ffff00000951af88 ffff80003d089280
[ 4.476483] 3b80: ffff00000951a000 ffff80003c075800 ffff00000c863d60 00000000000000fa
[ 4.484296] 3ba0: 0000000000000005 ffff80003c585838 ffff000008e1bee8 ffff000009596000
[ 4.492108] 3bc0: 00000000fffffff5 ffff00000c863c20 ffff0000086a3114 ffff00000c863c20
[ 4.499920] 3be0: ffff0000086a311c 0000000020400005 0000000000000000 ffff80003d4ae580
[ 4.507733] 3c00: ffffffffffffffff ffff00000c863c08 ffff00000c863c20 ffff0000086a311c
[ 4.515545] [] _request_firmware+0x60c/0x768
[ 4.523354] [] request_firmware+0x40/0x60
[ 4.529085] [] rproc_boot+0x124/0x440
[ 4.534553] [] rproc_auto_boot_callback+0x18/0x30
[ 4.539761] [] request_firmware_work_func+0x48/0x88
[ 4.546014] [] process_one_work+0x134/0x330
[ 4.552609] [] worker_thread+0x130/0x468
[ 4.558337] [] kthread+0xfc/0x128
[ 4.563719] [] ret_from_fork+0x10/0x18
[ 4.568490] —[ end trace 08eb1d549202ef51 ]—
[ 4.574092] remoteproc remoteproc0: firmware: wcnss.mdt will not be loaded
[ 4.578685] remoteproc remoteproc0: request_firmware failed: -11
[ 4.587245] reboot: Restarting system with command ‘bootloader’

Regards and Thanks
Ian

1 Like
#2

Hi Ian

The exact details of how the binary kernels were built is in the version history for the dragonboard410c-kernel repo. See this commit:
https://android-git.linaro.org/device/linaro/dragonboard410c-kernel.git/commit/?h=dragonboard-kernels&id=cc94efb4e5a1c2e09aa2b1aa1ce60d8abf826843

Note that unfortunately there is a typo in the commit message (should be db410c-qcomlt-4.14_defconfig).

#3

Hi danielt
Appreciate your help and the information so much.

I have a stupid question, how can I get the db410c-qcomlt-4.14_defconfig?

In fact, I had tried to make the deconfig and build the required Image.gz and apq8016-sbc.dtb based on the below steps. But, I still can NOT boot up the 410c kernel successfully.

  1. Clone the linaro source from the given repo
  2. Setup the toolchain.
    • export CROSS_COMPILE=gcc-linaro-7.2.1-2017.11-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
  3. Make kernel config (deconfig)
    • cd linaro-kernel/kernel/configs/
    • ./android-fetch-configs.sh
    • make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- qcom_defconfig android-recommended.config android-recommended-arm64.config android-base.config
  4. Then, build the kernel
    • make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j4
  5. At the end of a successful building, generate the db410c-qcomlt-4.14.gz-dtb
    • cat arch/arm64/boot/Image.gz arch/arm64/boot/dts/qcom/apq8016-sbc.dtb > db410c-qcomlt-4.14.gz-dtb
  6. Copy the db410c-qcomlt-4.14.gz-dtb to AOSP/device/linaro/dragonboard-kernels/, and then generate the bootimage only
    • make -j4 bootimage

I could have the positive result with the similar steps (except the deconfig generation) while I used the hikey620 device. Therefore, I’m wondering whether any things is wrong in my steps.

Any advice and suggestions will be greatly appreciated.

Regards and Thanks
Ian

#4

Strange.

If the binary kernel works for you then I think you can extract the compiler version used to build it (early lines in dmesg) and the configuration (/proc/config.gz) from the running kernel.

#5

Hi Danielt

Truly appreciate your advice and support.
After replacing the deconfig with db410c-qcomlt-4.14_defconfig, my 410c board can boot up successfully:)

Thank you so much.
Ian