how to switch off HDMI TMDS output on DM814x

Iris Zhou

Prodigy 250 points

on DM816x, I can set TMDS_CNTL[5] bit to 0 to switch off HDMI TMDS output，but on DM814x ,how can I do this???

over 10 years ago

0 Eason Wang over 10 years ago

TI__Genius 13460 points

The module is possibly the same. have you ever tried the same method?

0 Iris Zhou over 10 years ago in reply to Eason Wang

Prodigy 250 points

No , I don't think the module is the same, there are no TMDS_CNTL register on DM814x, and the phy registers description on DM814x datasheet is not correct !
Please can you check the datasheet and the registers on Dm814x ?

0 Pavel Botev over 10 years ago

TI__Guru**** 170625 points

Iris,

Iris Zhou said:
on DM816x, I can set TMDS_CNTL[5] bit to 0 to switch off HDMI TMDS output，but on DM814x ,how can I do this???

Have you tried with TMDS_CNTL2[5] OE bit? See DM814x TRM (SPRUGZ8E), section 13.3.6.1 TMDS Control Register 2 (TMDS_CNTL2)

BR
Pavel

0 Iris Zhou over 10 years ago in reply to Pavel Botev

Prodigy 250 points

We had contacted the local FAE,and confirmed dm814x datasheet is not correct about HDMI PHY,so the problem is there is no TMDS_CNTL register on DM814x

0 Pavel Botev over 10 years ago in reply to Iris Zhou

TI__Guru**** 170625 points

See if the below e2e thread will be in help:
http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/190101

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how to switch off HDMI TMDS output on DM814x