i.MX ProcessorsのトピックHow to add HDMI resolution to i.MX6 Yocto BSP.

How to add HDMI resolution to i.MX6 Yocto BSP.

satoshishimoda — Mon, 02 Jun 2014 11:13:24 GMT

Hi community,

Our partner want to output WXGA or WUXGA screen via HDMI.

They added the tables for WXGA and WUXGA in drivers/video/mxc/mxc_hdmi.c in L3.10.17-ga BSP similar as vga_mode (line 96).

However, it was not work well when video playback.

Actually, video playback speed was 1.2 times.

So we want to know how to add a new resolution to HDMI display.

Could you let me know correct procedure?

Best Regards,

Satoshi Shimoda

satoshishimoda — Mon, 09 Jun 2014 09:07:17 GMT

Could you give me a advice about this issue?

joanxie — Fri, 20 Jun 2014 10:32:31 GMT

pls send the detailed modified source code to me, and what uboot command did you use?

satoshishimoda — Mon, 23 Jun 2014 11:59:00 GMT

Hi Guanqion Xie,

We modified mxc_hdmi_edid_rebuild_modelist function in drivers/video/mxc/mxc_hdmi.c as following.

fb_destroy_modelist(&hdmi->fbi->modelist);

fb_add_videomode(&vga_mode, &hdmi->fbi->modelist);

fb_add_videomode(&wxga_mode, &hdmi->fbi->modelist); <- add

fb_add_videomode(&wuxga_mode, &hdmi->fbi->modelist); <- add

After adding the above code, user will be able to change HDMI resolation to 1280x800 by the following command after Linux BSP boot.

Best Regards,

Satoshi Shimoda