topic Re: Video Link 0probe device is failed in i.MX8QXP C0 LVDS in i.MX Processors

Video Link 0probe device is failed in i.MX8QXP C0 LVDS

kailas_kharse — Thu, 15 Oct 2020 05:54:00 GMT

Hello,

We have a custom board replicated from i.MX8QXP, I am facing the issue in U-boot to prove the LVDS driver.

Following are the boot logs:

BuildInfo:
- SCFW 4a1654e0, SECO-FW 376e3c15, IMX-MKIMAGE 6745ccdc, ATF 0645021
- U-Boot 2020.04-5.4.24-2.1.0+g4979a99

Boot: MMC0
DRAM: 1022 MiB
setup_typec lookup GPIO5_9 failed ret = 3
MMC: FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... OK
[*]-Video Link 0probe device is failed, ret 3
(1280 x 720)
[0] dpu@56180000, video
[1] lvds-channel@0, display
[2] lvds-to-hdmi-bridge@4c, video_bridge
In: serial
Out: serial
Err: serial

Can you please let me know, how to debug the issue?

Thanks & Regards,

Kailas K.

Re: Video Link 0probe device is failed in i.MX8QXP C0 LVDS

igorpadykov — Thu, 15 Oct 2020 07:52:09 GMT

Hi kailas_kharse

seems lvds is not supported in U-Boot 2020.04-5.4.24-2.1.0, one can

try to port it from ver. 2019.04_5.4.3_2.0.0, function enable_lvds()

https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/imx8qxp_mek/imx8qxp_mek.c?h=imx_v2019.04_5.4.3_2.0.0

https://source.codeaurora.org/external/imx/uboot-imx/tree/drivers/video/imxdpuv1.c?h=imx_v2019.04_5.4.3_2.0.0

Best regards
igor

Re: Video Link 0probe device is failed in i.MX8QXP C0 LVDS

kailas_kharse — Thu, 15 Oct 2020 12:14:46 GMT

Hello Igor,

I am working on U-Boot 2020.04-5.4.24-2.1.0 Which works fine on MEK, But Not working on Custom Board, I am able to get the Splash Screen in U-boot on MEK.

But in Custom Board I am getting the below error.

MMC: FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... OK
[*]-Video Link 0probe device is failed, ret 3
(1280 x 720)
[0] dpu@56180000, video
[1] lvds-channel@0, display
[2] lvds-to-hdmi-bridge@4c, video_bridge
In: serial
Out: serial
Err: serial
switch to partitions #0, OK
mmc0(part 0) is current device
flash target is MMC:0

Thanks & Regards,

Kailas K.

Re: Video Link 0probe device is failed in i.MX8QXP C0 LVDS

igorpadykov — Fri, 16 Oct 2020 00:43:18 GMT

Hi kailas_kharse

for that release one can try to debug function imx8_ldb_probe() in imx8_lvds.c
https://source.codeaurora.org/external/imx/uboot-imx/tree/drivers/video/imx/imx8_lvds.c?h=imx_v2020.04_5.4.24_2.1.0

Best regards
igor