How to distribute USB device applications to official Chrome OS?

Min-Chieh Tsai

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Jul 26, 2024, 9:36:41 PM7/26/24

to ChromiumOS Development

We are a USB to HDMI chip developer. We want to put applications based on libusb and EVDI (extensible virtual display interface) into the official release version of chrome os. I would like to ask you all, how do we start?

Reilly Grant

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Jul 29, 2024, 1:00:05 PM7/29/24

to Min-Chieh Tsai, Benson Leung, ChromiumOS Development

+Benson Leung can probably give you the official answer but I think it depends on the purpose of the applications. For firmware updates I believe we recommend manufacturers work with the fwupd project. For general user-facing applications using libusb (for value-added features beyond what the standard USB class driver provides) using the WebUSB API to build a companion web application may be an option.

Reilly Grant | Software Engineer | rei...@chromium.org | Google Chrome

On Fri, Jul 26, 2024 at 6:36 PM Min-Chieh Tsai <tsaimi...@gmail.com> wrote:

We are a USB to HDMI chip developer. We want to put applications based on libusb and EVDI (extensible virtual display interface) into the official release version of chrome os. I would like to ask you all, how do we start?

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Min-Chieh Tsai

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Jul 29, 2024, 11:39:21 PM7/29/24

to ChromiumOS Development, Min-Chieh Tsai

Hi Reilly,
Thank you for your help. Maybe I need to explain our product first. Its main function is like a computer graphics card, but the interface is USB instead of PCIe. However, the driver operates in user space, so there is no need to change to the Linux kernel. Manufacturers similar to us, such as DisplayLink and Silicon Motion, have built similar programs into Chromebooks. I can see from the developer mode that they have placed the program in the /opt/displaylink and /opt/siliconmotion directories. I hope our program can also be released with the Chrombook. However, in the source download of Chromium OS, the displaylink and siliconmotion programs were not found. So we were confused as to how to proceed. That's why I sent a letter here asking for help.

Min-Chieh Tsai 在 2024年7月27日星期六上午9:36:41 [UTC+8] 的信中寫道：

Raul Rangel

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Jul 30, 2024, 12:37:18 PM7/30/24

to ChromiumOS Development, Min-Chieh Tsai, Bernie Thompson

It seems that the media-libs/dlm ebuild is private and only included in ChromeOS, not ChromiumOS. Not sure of the history there.

+Bernie since it looks like he worked on the DisplayLink integration.

Reilly Grant

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Jul 30, 2024, 1:37:12 PM7/30/24

to Min-Chieh Tsai, Sean Paul, ChromiumOS Development, Bernie Thompson, Raul Rangel

It sounds like +Sean Paul is the right person to contact for integrating USB display drivers with ChromeOS.

Reilly Grant | Software Engineer | rei...@chromium.org | Google Chrome

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Sean Paul

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Jul 30, 2024, 1:50:39 PM7/30/24

to Reilly Grant, Min-Chieh Tsai, Bernie Thompson, Raul Rangel

Moving off-list, chromium-os-dev to bcc

Hi Min-Chieh,

Could you please provide some details on your company and product? Once we have that information, we'll know better how to proceed.

Thank you,

Sean

Min-Chieh Tsai

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Aug 2, 2024, 12:06:35 AM8/2/24

to ChromiumOS Development, Sean Paul, Min-Chieh Tsai, Bernie Thompson, Raul Rangel, Reilly Grant

Hi Sean,

It seems inappropriate to publish company information on a public forum, I sent the company profile to your personal e-mail(google), please check it.

Sean Paul 在 2024年7月31日星期三凌晨1:50:39 [UTC+8] 的信中寫道：

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