MIPI DSI LCD display of i.mx8mq

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MIPI DSI LCD display of i.mx8mq

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Contributor I

Hi,

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

endmode

root@myd-imx8mq:~#

Please check and provide the correct guide.

Thanks in advance,

Regards,

Jamesko

 

 

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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

https://community.nxp.com/message/1060383?commentID=1060383#comment-1060383

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