topic Re: How to calculate values for HDMI TX clock control setting? in i.MX Processors

How to calculate values for HDMI TX clock control setting?

jseo — Wed, 04 Nov 2020 20:24:08 GMT

Hello,

I am testing with non-standard LCD pannel and imx8mq-EVK

So, I would like to know how to calculate a value of each parameter. My LCD is not standard. So I should find the values for HDMI TX clock control setting and then add my entry to the table (imx8mq_ctrl_table[], drm/imx/cdn-mhdp-hdmi-phy.c)

I found a post related to this issue. An answer mentioned "HDMI - pixel clock calculation" tool.
But, I cannot find the tools anywhere.

Where can I find "HDMI - pixel clock calculation" tool?
Please give me advice.

Thank you.

Re: How to calculate values for HDMI TX clock control setting?

weidong_sun — Fri, 06 Nov 2020 01:27:06 GMT

Hello jseo,

Sent it to your personal email, check it, please!

Have a nice day!

B.R,

Weidong

Re: How to calculate values for HDMI TX clock control setting?

dernst — Mon, 21 Dec 2020 15:00:36 GMT

Hi Weidong,

I am needing the tool as well for the same reason. Please let me know if you are able to email it to me.

Thank you!

Dan

Re: How to calculate values for HDMI TX clock control setting?

cmsd — Tue, 19 Jan 2021 16:08:50 GMT

Hi Jseo,

Could you send me this tool which Weidong sent you, please, as the link https://community.nxp.com/servlet/JiveServlet/download/1224555-1-458676/HDMI%20-%20pixel%20clock%20calculation.xlsx is broken.

Thanks,

Chris.

Re: How to calculate values for HDMI TX clock control setting?

oas — Tue, 26 Jan 2021 08:39:06 GMT

Hi Weidong,

I am needing the tool for the same reason, too. Can you email it to me.

Thank you!

oas

Re: How to calculate values for HDMI TX clock control setting?

cmsd — Tue, 26 Jan 2021 08:50:43 GMT

I've attached the spreadsheet to the solution of: https://community.nxp.com/t5/i-MX-Graphics/Driving-a-1080x1920-portrait-HDMI-screen/m-p/1218253#M92