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PZak.1
PZak.1
Associate II
October 14, 2021
Solved

Is there an example device tree and possibly connection diagram demonstrating how to enable the B-LCDAD-HDMI1 on an STM32MP1 based platform using DSI.

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PZak.1
PZak.1Best answer
Associate II
December 10, 2021

We successfully implemented the B-LCDAD-HDMI on our platform. The solution for us was using the attached device tree and applying the following patch:

https://patchwork.kernel.org/project/dri-devel/patch/20190627151740.2277-1-matt.redfearn@thinci.com/

I posted this in hope that someone could use this information.

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2 replies

PZak.1
PZak.1AuthorBest answer
Associate II
December 10, 2021

We successfully implemented the B-LCDAD-HDMI on our platform. The solution for us was using the attached device tree and applying the following patch:

https://patchwork.kernel.org/project/dri-devel/patch/20190627151740.2277-1-matt.redfearn@thinci.com/

I posted this in hope that someone could use this information.

AntonioST
AntonioST
ST Employee
January 27, 2022

Hi @PZak.1​ ,

thanks for your post.

While the patch you suggest was merged upstream during the merge window of kernel v5.4-rc1 as

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=83f35bc3a852

it has been reverted as

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2472518e44ee

just before v5.4-rc1 get tagged because it breaks something else.

I would not suggest using it.

I'm posting a working setup as reply of https://community.st.com/s/question/0D53W00000dPnpC/

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