DB410 LK splashscreen

Products Support DragonBoard410c
#1

Hi

I am using custom LCD panel with Android on Dragonboard410c using SN65DSI84 DSI to LVDS bridge and it is working with Android. Problem i have is LK where i dont get any splash screen, so until androids bootanimation is shown screen is black. What i would like to know is if LK is able to show some splashscreen. I tried setting DISPLAY_SPLASH_SCREEN=1 in LKs makefile and i have set right panel using fastboot:
sudo fastboot oem select-display-panel TWS5101DHTL40N
That is added in LK following DSI Display Porting Guide.PDF instructions

Any pointers will be appreciated

#2

Which version of Android are you using? qcom or linaro image?

#3

Qcom at the moment.

Thanks

#4

HI Roko,

Please make sure below changes are updated into your source code.

1)To enable the continuous splash display, change DISPLAY_SPLASH_SCREEN to 1 at bootable/bootloader/lk/target/msm8916/rules.mk.

2)please check target_cont_splash_screen() function in bootable/bootloader/lk/target/msm8916/init.c. whether it returns 1 or not.

if you still face the issue to analyze it further please upload your boot up logs.

Thanks,
Ramesh

#5

Hi

So after checking LK sources and boot log i see that LK is searching for splash partition. I guess i need to make splash partition on emmc and put some splash.img there?
I guess there is no default splash screen?

this is my boot log :

[0] [0] welcome to lk
[10] [10] platform_init()
[10] [10] target_init()
[50] [50] SDHC Running in HS200 mode
[70] [70] Done initialization of the card
[80] [80] pm8x41_get_is_cold_boot: cold boot
[90] [90] OEM panel override:TWS5101DHTL40N
[140] [140] Config MIPI_VIDEO_PANEL.
[150] [150] ERROR: splash Partition invalid
[170] [170] Turn on MIPI_VIDEO_PANEL.
[190] [190] Video lane tested successfully
[210] [210] pm8x41_get_is_cold_boot: cold boot
[220] [220] Unable to locate /bootselect partition
[220] [220] boot_verifier: Device is in ORANGE boot state.
[220] [220] Device is unlocked! Skipping verification…
[230] [230] Loading boot image (17268736): start
[350] [350] Loading boot image (17268736): done
[360] [360] use_signed_kernel=1, is_unlocked=1, is_tampered=0.
[810] [810] Best match DTB tags 247/00000018/0x00000000/0/2000b/0/0/0/90a4e327/28634
[810] [810] Using pmic info 0x2000b/0x0/0x0/0x0 for device 0x2000b/0x0/0x0/0x0
[820] [820] target_display_panel_node:510: hw_id=24 panel_name=" TWS5101DHTL40N"
[830] [830] cmdline: console=ttyHSL0,115200,n8 androidboot.console=ttyHSL0 androidboot.hardware=qcom msm_rtb.filter=0x237 ehci-hcd.park=3 androidboot.bootdevice=7824900.sdhci lpm_levels.sleep_disabled=1 earlyprit
[930] [930] Updating device tree: done
[940] [940] Turn off MIPI_VIDEO_PANEL.
[950] [950] Target_cont_splash=1
[950] [950] Continuous splash enabled, keeping panel alive.
[960] [960] booting linux @ 0x80080000, ramdisk @ 0x82000000 (1071987), tags/device tree @ 0x81e00000
[970] [970] Jumping to kernel via monitor

#6

How long is LK even running for before the kernel takes over? I’d be inclined to just skip the LK splash and add a kernel splash.

#7

I was thinking same thing since LK is fast. Will try to do that

Best regards