Does HDMI resolution shared with lvds panel resolution?

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Does HDMI resolution shared with lvds panel resolution?

564 Views
wangtsungli
Contributor IV

Hi Community,

I'm working on i.MX6 Quad sabre-SD platform and build Android 6.0 for my OS system.

Now I'm working on HDMI and LVDS show different resolution at the same time.

Here is my u-boot command line settings.

bootargs=console=ttymxc0,115200 init=/init video=mxcfb0:dev=ldb,bpp=32 video=mxcfb1:dev=hdmi,1920x1080M@60,bpp=32 video=mxcfb2:off video=mxcfb3:off vmalloc=256M androidboot.console=ttymxc0 consoleblank=0 androidboot.hardware=FX100 cma=384M androidboot.selinux=disabled androidboot.dm_verity=disabled no_console_suspend=1 enable_wait_mode=off

ldb is on mxcfb0 and HDMI is on mxcfb1.

Here is the situation.

My LVDS panel resolution is 1024*768 and my HDMI resolution is expected to FULL HD.

But when they showed up, HDMI showed 1024*768 resolution instead of FULL HD.

Question:

  1. Is that possible HDMI and LVDS panel showed in different resolution?
  2. If can how can I complete it? Do I need to modify kernel driver?

Thanks in Advanced!

3 Replies

250 Views
igorpadykov
NXP TechSupport
NXP TechSupport

Hi tsung

HDMI and LVDS may work with different resolutions, please try to follow

sect.3.4.3 Booting with dual displays: LVDS and HDMI displays attached

Android Quick Start Guide. Use software from

i.MX Software|NXP 

Best regards
igor
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250 Views
wangtsungli
Contributor IV

Hi igorpadykov

I can show two display already.

But what my problem is how can I show two different resolution.

Android Quick Start Guide on sect 3.4.3 just tell me how to set the u-boot environment.

In my question I had post my u-boot environment and is same as the setting told in sect 3.4.3.

Still my HDMI still followed LVDS's resolution and can not show FULL HD.

How is this happened?

250 Views
igorpadykov
NXP TechSupport
NXP TechSupport

please check additional suggestions on

LCD and HDMI interface not working together ! 

Best regards
igor

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