DRA712: Query regarding DRA712 AP

Harshal Nampalliwar

Prodigy 10 points

Part Number: DRA712
Other Parts Discussed in Thread: DRA829

Hi,

I am having doubt regarding DRA712 AP.

I want to use PCIe x1 as end-point and Display-subsystem HDMI as a output port.

So, can we use this AP as Video display controller?

Thanks & Regards,

Harshal

22 days ago

0 Takuma Fujiwara 22 days ago

TI__Guru 56213 points

Hi Harshal,

Can I get clarification for what is planned and about the doubt?

For example, is this an accurate system you have in mind:

External Chip acting as PCIe RC -> PCIe x1 lane at Gen 2 speeds -> PCIe EP DRA712 -> HDMI -> display

Regards,

Takuma

0 Harshal Nampalliwar 21 days ago in reply to Takuma Fujiwara

Prodigy 10 points

Hi Takuma,

Can this AP be used as a video display card/controller?

The example you have referred to is correct, and we intend to use it in a similar manner in our design.

Regards,

Harshal

0 Takuma Fujiwara 21 days ago in reply to Harshal Nampalliwar

TI__Guru 56213 points

Hi Harshal,

Technically, it should be possible. DRA712 will receive data on PCIe and pass it through to HDMI.

DRA712 is an older generation of devices, but the next generation of devices, the DRA829, has examples in Linux where PCIe data received on one PCIe port is passed through to another PCIe port, acting as a non-transparent bridge between two PCIe devices (https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/11_01_00_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/PCIe/PCIe_Backplane.html). Your usecase will be similar to this example, except instead of passing data to another PCIe port, it will pass data to HDMI.

However, x1 lane of Gen 2 speed PCIe max theoretical throughput is 5Gbps. It is unclear what FPS or resolution is planned for the HDMI display, but as an example, if attempting to connect a 4K monitor at 60 fps, then that will definitely have bandwidth issues.

Regards,

Takuma

0 Harshal Nampalliwar 20 days ago in reply to Takuma Fujiwara

Prodigy 10 points

Hi Takum,

Thanks for the help!

We will check the DRA829 and example link for our application.

Thanks again!

Regards,

Harshal

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DRA712: Query regarding DRA712 AP