i.MX8MQ EVK display with EDP panel

yumy — Thu, 28 Dec 2023 05:08:29 GMT

HI, i'm trying to develop displsy functionality with edp panel

My Question is how to set link rate and i2c-over aux?

Beacause I get the following error, here is my dmesg about dp

root@imx8mqevk:~# dmesg | grep dp
[ 0.141282] RPC: Registered udp transport module.
[ 1.726144] mxc-mipi-csi2_yav 30a70000.mipi_csi: Remote device at endpoint@0 XXX found
[ 1.748183] mxc-mipi-csi2_yav 30b60000.mipi_csi: Remote device at endpoint@0 XXX found
[ 2.375432] cdns-mhdp-imx 32c00000.hdmi: lane-mapping 0xc6
[ 2.380955] cdns-mhdp-imx 32c00000.hdmi: Failed to get i2c-over-aux-retries - using default 5
[ 2.389495] cdns-mhdp-imx 32c00000.hdmi: i2c-over-aux-retries 0x05
[ 2.420125] cdns-mhdp-imx 32c00000.hdmi: wrong link rate index
[ 2.433716] imx-dcss 32e00000.display-controller: bound 32c00000.hdmi (ops cdns_mhdp_imx_ops)
[ 4.472171] systemd[1]: Created slice Slice /system/modprobe.
[ 5.434624] systemd[1]: Starting Coldplug All udev Devices...

Board : IMX8MQ EVK

Bootloader : imx-boot-imx8mqevk-sd.bin-flash_dp_evk

DTB : imx8mq-evk-dp.dtb

setting video_off=y on u-boot

here is my device tree

Thanks

Re: i.MX8MQ EVK display with EDP panel

Zhiming_Liu — Wed, 03 Jan 2024 07:41:29 GMT

Please share your edp hardware design.

Re: i.MX8MQ EVK display with EDP panel

yumy — Wed, 03 Jan 2024 08:08:19 GMT

sorry, i think it might be the lanes problem,

my edp panel are 2 lanes, but the imx8mq evk bsp are for 4 lanes,

please tell me how to change num of lanes?

topic Re: i.MX8MQ EVK display with EDP panel in i.MX Processors

i.MX8MQ EVK display with EDP panel

Re: i.MX8MQ EVK display with EDP panel

Re: i.MX8MQ EVK display with EDP panel