Announcement

Collapse
No announcement yet.

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

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

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

    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?pag...Linux-4.19-USB

  • #2
    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.

    Comment


    • #3
      Originally posted by edwaleni View Post
      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.

      Comment


      • #4
        Originally posted by edwaleni View Post
        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.

        Comment


        • #5
          Originally posted by GrayShade View Post

          You linked to their homepage there.
          Try this. The link tool truncated it.

          https://www.st.com/content/ccc/resou...DM00479305.pdf

          Comment

          Working...
          X