MIPI DSI LCD display of i.mx8mq

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MIPI DSI LCD display of i.mx8mq

Contributor I


I am trying to use jdi-lt070me05000 (1200x1920 mipi dsi display) on i.mx8mq custom board.

I saw HDMI working fine with DCSS, but now I tried to enable the LCD mentioned above with DCSS (mipi dsi) referencing the "fsl-imx8mq-evk-dcss-rm67191.dts" file.
But here I am getting the error as below.


[   2.178352] clk: failed to reparent disp_rtrm_pre_div to video_pll1_out: -22

[    2.188997] [drm] Initialized

[    2.197910] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).

[    2.204607] [drm] No driver support for vblank timestamp query.

[    2.210660] imx-drm display-subsystem: bound imx-dcss-crtc.0 (ops dcss_crtc_ops)

[    2.218218] nwl_dsi-imx mipi_dsi@30A00000: Using DCSS as input source

[    2.224976] 30a00000.mipi_dsi_bridge.0 supply power not found, using dummy regulator

[    2.232886] nwl-mipi-dsi 30a00000.mipi_dsi_bridge: [drm:nwl_dsi_host_attach] lanes=4, format=0x0 flags=0x401

[    2.242789] imx-drm display-subsystem: bound mipi_dsi@30A00000 (ops imx_nwl_dsi_component_ops)

[    2.256144] [drm] OPIPE_CFG: gamut = 1, nl = 1, pr = 1, pix_format = 875713089

[    2.883353] Console: switching to colour frame buffer device 150x120

[    2.945546] imx-drm display-subsystem: fb0:  frame buffer device


However, after that, all other prints will look correct, but the LCD will show nothing. Clock and power sequences are displayed as expected.

fbset command outputs as below.

Last login: Wed Apr  1 09:01:18 UTC 2020 on tty7

root@myd-imx8mq:~# fbset

mode "1200x1920"

    geometry 1200 1920 1200 1920 32

    timings 0 0 0 0 0 0 0

    accel true

    rgba 8/16,8/8,8/0,0/0



Please check and provide the correct guide.

Thanks in advance,





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NXP TechSupport
NXP TechSupport

it seems that you don't set the correct clock, try to double confirm that if you set the clock correct or not


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