Display lcd kernel 4.1.15

xarowubas — Fri, 26 Jun 2020 14:49:18 GMT

Dear NXP Community,

I am trying to setup a RGB LCD display with kernel 4.1.15 (imx6dl) and with UBoot I am able to show the logo.

On the boot phase the frame buffer is loaded:

mxc_sdc_fb fb@0: registered mxc display driver lcd

but I get an error "Division by zero in kernel" on the below function (ipu_disp.c)

div = clk_get_rate(clk_get_parent(ipu->pixel_clk_sel[disp])) / rounded_pixel_clk;

That's because the below function fails returning 0:

rounded_pixel_clk = clk_round_rate(ipu->pixel_clk[disp], pixel_clk);

The clock name and rate of ipu->pixel_clk[disp] (get with printk) are:

name: ipu1_pclk0
rate: 0

I think some clock definition is missing in the DTS but I could not figure it out..

Thank you very much for any suggestion

Re: Display lcd kernel 4.1.15

igorpadykov — Fri, 26 Jun 2020 23:29:41 GMT

Hi Xaro

one can look at various RGB LCD display with i.MX6Q(DL) examples on boundary devices

resources (nxp does not support such configuration in its bsps)

https://boundarydevices.com/configuring-i-mx6-machines-different-screens-nitrogen6x-sabre-lite/

Best regards
igor
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topic Re: Display lcd kernel 4.1.15 in i.MX Processors

Display lcd kernel 4.1.15

Re: Display lcd kernel 4.1.15