where exactly did you add the overlays in the first paragraph ? only
overlays in /boot/uboot/overlays are read by the proprietary bootloader
(you need to create the dir)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1655411

Title:
  Cannot enable VC4 graphics driver on RPi 3

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  It seems the VC4 device tree overlay is not applied by the Rpi
  firmware.

  I tried adding dtoverlay=vc4-kms-v3d and adding a corresponding
  .../overlays/vc4-kms-v3d.dtbo file but it seems the Rpi bootloader
  does not apply the overlay at all.

  I merged vc4-kms-v3d.dtbo into bcm2710-rpi-3-b.dtb using a dtmerge utility 
compiled by pulling pieces from (https://github.com/raspberrypi/userland and 
https://github.com/dgibson/dtc)
  The result is here: https://github.com/albaguirre/dtmerge

  With this new device tree binary blob, The VC4 driver (as a module)
  loads (and you can see /dev/dri/ entries)

  I also played around with the tip of u-boot tree
  (git://git.denx.de/u-boot.git) which has support to apply device tree
  overlays - it applied fine and VC4 is at least recognized but the
  driver cannot initialize properly.

  Any idea on what magic incantation is needed for the RPi loaders
  (start.elf etc) to apply the vc4 overlay?

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655411/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to