TX1 HDMI CEC

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

Hello, I intend to use TX1 to implement HDMI-CEC function, and could you show me where is the code(about CEC interfaces) ?Thank you!

2

Hi nklc2009,

I have done a quick check that we have tegra-cec driver in kernel, but seems not enable on L4T. I will help check if there is a plan on L4T.

3

Thank you!
Does that mean we can not use HDMI-CEC now on TX1? But in this document, Tegra_X1_TRM_DP07225001_v1.2p.pdf, TX1 can support HDMI-CEC.

4

Hi nklc2009,

Yes, TRM describes that tegra hw supports CEC. However, the sw support, i.e. frameworks, is not implemented at all. We still have no such plan.

5

Just as the tegra hardware already supports CEC(we have tegra-cec driver in kernel), can I implemente CEC functionality in HAL by myself?

6

Hi nklc2009,

Yes, you can implement the function. Do you need help to point out where the CEC kernel code is?

7

Yes,please point out where the CEC kernel code is,thank you!
And are there any related tegra-cec kernel interfaces can be use in HAL?

8

Hi nklc2009,

Those code are under drivers/misc/tegra-cec

9

Thank you for your help!
But could these kernel code(tegra-cec) be used for me in HAL now?

10

Hi nklc2009,

I cannot guarantee that, since L4T only has this part related to CEC.

Tegra has once made some work in HAL, but that is not on L4T and I cannot access to it, either.