HDMI output from imx6 or imx7

[jhtate1]

Hello NXP,

How can I configure our 7" display for HDMI on IMX7 Sabre board ?

We also have the iMX6 MCIIMX6Q-SDB and cannot get the HDMI working either.

Can you help us get the iMX6 or iMX7 to a 1024 x 600 at 60 Frames per second?

Here is what we are getting when connecting to the iMX6 or iMX7:

We have proven that the HDMI Display works with a laptop:

Thank you.

[jhtate1]

Thank you.

[igorpadykov]

Hi Jonathan

regarding i.MX6Q, HDMI driver selects video modes found in struct fb_videomode
in linux/drivers/video/mxc/mxc_edid.c
1024 x 600 is not formally supported by i.MX6Q HDMI according to
sect.33.4.3 Supported Video Mode i.MX6DQ Reference Manual
http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf

one can try patch provided on
https://community.freescale.com/thread/379601
and check
http://lists.denx.de/pipermail/u-boot/2012-October/136234.html

For i.MX7 HDMI support suggest to create new thread, shortly

one can change resolution in imx7d-sdb.dts:
http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/arch/arm/boot/dts/imx7d-sdb.dts?id=...
    sii902x: sii902x@39 {
        mode_str ="1280x720M@60";

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[jhtate1]

Thank you for the answers Igor.

The patch is very old and didn't work :-( - but thanks for trying.

We did get the i.MX7 to work well, thank you, but we really need the GPU of the I.MX6 since we have other algorithms running.

In light of our desire to use the i.MX6, could you recommend a good 7" HDMI +USB capacitive touch screen with a resolution of 1280x720 or 1920x1080?  We are searching the web for such a display now, but could use your recommendation.

You mention having a fix for 1280x960 - Could you change it to 1280x720??

https://community.nxp.com/message/819986

• +static const struct fb_videomode wvga_mode = {

+ /* 1280x960 @ 60 Hz */

+ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,

+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,

+ FB_VMODE_NONINTERLACED | FB_VMODE_ASPECT_4_3, FB_MODE_IS_VESA,

+};

That would be the perfect solution for our application.

Thank you for your help!

Jonathan Tate

[igorpadykov]

Hi Jonathan

both 1280x720 and 1920x1080 are supported hdmi modes and

should work with any monitor. I.MX6Q demo images on below link work with

1920x1080

i.MX 6 Series Software and Development Tool|NXP 

Best regards
igor

[jhtate1]

Sorry, my mistake.  I apologize.

What we need for the parameters for 1024x600

Thank you.

[igorpadykov]

Hi Jonathan

as 1024 x 600 is not formally supported by i.MX6Q HDMI

you may wish to apply to Professional Services to develop that

non-standard solution

http://www.nxp.com/support/nxp-professional-services:PROFESSIONAL-SERVICE
ProSupport@nxp.com

Best regards
igor

[jhtate1]

Hello Igor,

We see that Qiang Li provided a solution for this customer: https://community.nxp.com/message/819986 

iMX6Q AI board support for 1280×800 HDMI ... | NXP Community

• • • In drivers/video/mxc/mxc_edid.c

      const struct fb_videomode mxc_cea_mode[64], we also need to add this video format:

      /* #60: 1280x800p@60 */

      [60] = {

        NULL, 60, 1280, 800, 14084, 10, 6, 14, 3, 4, 6,

        FB_SYNC_HOR_HIGH_ACT,

        FB_VMODE_NONINTERLACED | FB_VMODE_ASPECT_4_3, 0

      },

      So why can't we get the same changes?  We will NOT be able to afford the Professional Services.

      Again we need the parameters for 1024x600,

      Thank you for your help.

[jhtate1]

Ok thank you.