HDMI DDC on linux-fslc/mainline with i.MX6

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

HDMI DDC on linux-fslc/mainline with i.MX6

1,183 Views
cconley
Contributor II

Hello all,

I've been trying to get HDMI up and running on the linux-fslc/mainline kernel (specifically 3.14.14), and there doesn't seem to be a way to use the actual DDC_SDA/SCL lines (e.g. via ROW3/COL3 mux) on the i.MX6Q/D SoCs.

Most of the available EVMs have the DDC i/o share a standard I2C channel, causing issues/tradeoffs with the 100kHz restriction on ddc traffic.

I know this support existed before (though crammed into the HDCP support) on older kernels, but is there a patchset for this support that I'm not finding?

Does someone know if there are plans to support this feature of the i.MX6 in mainline?

//Chris

0 Kudos
Reply
2 Replies

703 Views
fabio_estevam
NXP Employee
NXP Employee

Chris,

Please use kernel 3.16 instead of 3.14.14. DDC works fine in this kernel version on some boards Iike mx6qsabresd, cuboxi, wandboard.

0 Kudos
Reply

703 Views
alejandrolozan1
NXP Employee
NXP Employee

Hi,

Are you trying to use the SDA and SCL lines for the HMDI? I have tried this with our official release  to read the EDID and it worked, but I  have not tried with mainline.

I do not know if you are trying to achieve something similar.

Best Regards,

Alejandro

0 Kudos
Reply