IMX8MQ HDMI detection at U-Boot level

[hiteshviradiya]

Dear NXP team,

We have designed our custom product based on imx8mq SoC and we are good with the things nowadays.

We want to detect HDMI at u-boot level. How can it be done ?

On our imx6 base product we are already using it and we have usecase for this and in imx6 u-boot

struct display_info_t structure in board file have

.detect = hdmi_detect

but in imx8mq u-boot it is NULL. And hence u-boot is always default to HDMI irrespective of HDMI monitor is connected or not.

Please advise how to achieve our usecase of detecting HDMI at uboot level.

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Thanks,

Hitesh

[igorpadykov]

Hi Hitesh

some hdmi related codes are provided in uboot:

imx8mq_evk.c\imx8mq_evk\freescale\board - uboot-imx - i.MX U-Boot 

edid detection codes can be reused from linux sources, one can look

at sect.6.4.6 High-Definition Multimedia Interface (HDMI) and Display
Port (DP) Overview attached Linux Manual.

linux-imx - i.MX Linux kernel 

Best regards
igor
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