USB Patches Posted For Linux 4.19 Kernel, Including The New USB-C DisplayPort Driver

[phoronix]

Phoronix: USB Patches Posted For Linux 4.19 Kernel, Including The New USB-C DisplayPort Driver

Having wrapped up his latest stable kernel wrangling and the fallout from L1TF/Foreshadow, Greg Kroah-Hartman got around today to sending out the feature pull requests for the kernel subsystems he oversees...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.19-USB

[edwaleni]

Alternate Mode can be enabled only via a USB PD protocol handshake through structured vendor-defined messages (VDM) to discover, configure, and to enter or exit Alt Modes.

For anyone interested in how USB negotiates alt-modes, specifically Display Port, see this white paper from ST Micro. It gives a good idea of just what is involved in getting alt-modes to work correctly on any stack, let alone Linux.

[GrayShade]

For anyone interested in how USB negotiates alt-modes, specifically Display Port, see this white paper from ST Micro. It gives a good idea of just what is involved in getting alt-modes to work correctly on any stack, let alone Linux.

You linked to their homepage there.

[brrrrttttt]

Alternate Mode can be enabled only via a USB PD protocol handshake through structured vendor-defined messages (VDM) to discover, configure, and to enter or exit Alt Modes.

For anyone interested in how USB negotiates alt-modes, specifically Display Port, see this white paper from ST Micro. It gives a good idea of just what is involved in getting alt-modes to work correctly on any stack, let alone Linux.

Writing USB protocol drivers from scratch is sadly really painful.

[edwaleni]

You linked to their homepage there.

Try this. The link tool truncated it.

https://www.st.com/content/ccc/resource/technical/document/technical_article/group0/98/86/5c/a3/d0/2e/41/98/DM00479305/files/DM00479305.pdf/jcr:content/translations/en.DM00479305.pdf