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iMX8 Family DisplayPort

Question asked by Stan Bertrand on Oct 29, 2019
Latest reply on Apr 4, 2020 by Joan Xie



I would like to better understand DisplayPort support on the iMX8 product family.


The imx-yocto-L4.14.98_2.0.0_ga release documentation i.MX Linux Reference Manual present HDMI Support for i.MX 8M Quad and i.MX 8QuadMax as "HDMI 2.0/Display Port 1.3 on chip".


Is there a difference between the iMX8M and iMX8 series HDMI/DisplayPort subsystem ?


When building the boot firmware for iMX8M, I notice reference to HDMI / DisplayPort :

- ./mkimage_imx8 -fit -signed_hdmi signed_dp_imx8m.bin

- ./mkimage_imx8 -fit -signed_hdmi signed_dp_imx8m.bin 


Are those firmware and initialization specific to the iMX8M (Mscale) ?


The iMX8QuadMax imx-mkimage has reference to hdmitxfw.bin and hdmirxfw.bin. The firmware-imx bundle has hdmitxfw.bin, hdmirxfw.bin and dpfw.bin. The dpfw.bin is not referenced by imx-mkimage.


Is a firmware required to enabled displayport on iMX8QM ?

Is dpfw.bin required to enable displayport on iMX8QuadMax (iMX8QM) ?


Is the difference in firmware due to a difference in HDMI/DisplayPort subsystem ?

Is the difference in firmware due to a difference in the SoC family ( iMX8M (MSCALE) vs iMX8 ) ?