IMX6Q: How to change HDMI resolution

[hakjung]

Hi,

Currently, I'm working on a SabreSD board with the latest BSP package (L3.0.35_1.1.0).

The problem is whatever I set for my u-boot settings the HDMI resolution is always 640x480.

Here are more information of my board.

1. When I typed "xrandr", I cannot see any interface except Screen 0.

2. When I checked modes of HDMI, it gives me following list.

When hotplug HDMI

U:640x480p-59

V:1280x1024p-60

V:1024x768p-60

U:2880x480p-60

U:1920x1080p-24

U:1920x1080p-50

U:1280x720p-50

U:720x576p-50

U:720x576p-50

U:1920x1080p-60

U:1440x240p-60

U:1280x720p-60

U:720x480p-60

U:720x480p-60

U:640x480p-60

My DELL monitor supports the resolution of 1280x720@60.

I checked previous discussions similar to this one, however, I didn't get any help.

Any commnets will be appreciated.

Sincerely,

Hak

[daiane_angolini]

No, you should change your kernel command line. Please take a look on release notes, there you can see every video possibility.

Do you know how to change kernel command line on u-boot?

[hakjung · Accepted solution]

Daiane,

Yes, I do.

Actually, I resolved this issue a few days ago.

After comparing my u-boot command lines with other ones, I found there's a redundant space in the video setting command line.

Anyway, thanks for your comment.

[daiane_angolini]

you're welcome :smileywink:

[zhaojianbo]

I want to get HDMI resolution of 1440x900M@60,how to do?  thanks!

[daiane_angolini]

Take a look on Table 33-3 From reference manual

Choose the closest one and include one new entry on mxc_edid.c file.

[zhaojianbo]

hello,

Thank you for help!

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[zhaojianbo]

I follow what you said ,but can't solve the problem.