HDMI custom resolution and clock setting

[lsg5131420]

Hi

I want to add support for 1280*800 and 1366*768 resolution with hdmi display on imx8mq. By reading the code，I found the pixel clock 85.5M(1366*768) and 71.1M(1280*800)  was not  supported. i am afraid  i shouled modify table 8(t28hpc_hdmitx_clock_control_table_pixel_out[]) and table 9(t28hpc_hdmitx_pll_tuning_table_pixel_out[]) to support 85.5M and 71.M. and I have read the IMX8MDQLQRM datesheet. and it does not describe about this. How can I to config these tables?

BR

Liu

[Rita_Wang]

The resolutions 3840x2160,1920x1080, 1280x720, 720x480 are support in our default BSP. For the other resolutions work you need to change the clocks accordingly to the display requirements.

Here I found the patch based on the Linux 4.14.78-1.0.0_ga version BSP. Hope can do help for you.

[lsg5131420]

Hi Rita

Thanks for your reply. I use the BSP version is Linux 4.14.98. I found my quesiton  is answered on HDMI DRM custom resolution and clock frequency . They use  HDMI - pixel clock calculation tools to generate coustom hdmi pixel clock. But I can not download the tools because of no authorization. Please send the tools to me, if that is convinent.

Thanks very much.

Best regards

Shiguang Liu

[Rita_Wang]

I have email to you, please check.

[lsg5131420]

Hi Rita

Thank you very much. It is useful to me.

Best regards.

Shiguang Liu

[Rita_Wang]

You are welcome~~

[Rita_Wang]

Hi Shiguang,

OK, I will do confirm it and then give you reply.

Have a nice day

Best regards

Rita

[Rita_Wang]

Which version of BSP are you using?