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MIPI DSI LCD display in i.MX8M

Question asked by yashavantha shetty on Sep 20, 2018
Latest reply on Nov 16, 2018 by yashavantha shetty

Hi,

 

I am using i.MX8M custom board with raydium-rm68200(720P mipi dsi display).

I have tried HDMI with DCSS and it worked fine, now trying to enable above mentioned LCD with DCSS(mipi dsi), referred "fsl-imx8mq-evk-dcss-rm67191.dts" file for the same.

But here i'm facing a error print as below.

******************************************************************

[    1.202690] clk: failed to reparent disp_rtrm_pre_div to video_pll1_out: -22
[    1.213408] [drm] Initialized
[    1.222852] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.229491] [drm] No driver support for vblank timestamp query.
[    1.235597] imx-drm display-subsystem: bound imx-dcss-crtc.0 (ops dcss_crtc_ops)
[    1.243093] nwl_dsi-imx mipi_dsi@30A00000: Using DCSS as input source
[    1.356820] 30a00000.mipi_dsi_bridge.0 supply power not found, using dummy regulator
[    1.364776] nwl-mipi-dsi 30a00000.mipi_dsi_bridge: [drm:nwl_dsi_host_attach] lanes=4, format=0x0 flags=0xc05
[    1.374625] [drm] raydium_rm68200_panel 720x1280@50 24bpp dsi 4dl - ready
[    1.381486] _panel 720x1280@50 24bpp dsi 4dl - ready
[    1.386524] imx-drm display-subsystem: bound mipi_dsi@30A00000 (ops imx_nwl_dsi_component_ops)
[    1.397830] [drm] OPIPE_CFG: gamut = 3, nl = 1, pr = 1, pix_format = 875713089
[    2.361984] Console: switching to colour frame buffer device 90x80
[    2.408954] imx-drm display-subsystem: fb0:  frame buffer device

************************************************************************

But after that print all other prints looks proper, but nothing displays on LCD. Clock and power sequences are seen as expected.

 

Fbset command outputs as below.

root@imx8mqevk:~# fbset

mode "720x1280"
    geometry 720 1280 720 1280 32
    timings 0 0 0 0 0 0 0
    accel true
    rgba 8/16,8/8,8/0,0/0
endmode

root@imx8mqevk:~#

 

Kindly provide your inputs regarding this.

 

Thanks in advance,

 

Regards,

Yashavantha

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