[0/2] of: Register platform device for each framebuffer

Message

Thomas Zimmermann April 13, 2022, 9:24 a.m. UTC

Move the detection of OF framebuffers from fbdev into of platform code
and register a Linux platform device for each framebuffer. Allows for
DRM-based OF drivers and real hot-unplugging of the framebuffer.

This patchset has been tested with qemu's ppc64le emulation, which
provides a framebuffer via OF display node. If someone has an older
32-bit system with BootX available, please test.

Thomas Zimmermann (2):
  of: Create platform devices for OF framebuffers
  fbdev: Remove hot-unplug workaround for framebuffers without device

 drivers/of/platform.c            | 73 ++++++++++++++++++++++--
 drivers/video/fbdev/core/fbmem.c |  9 +--
 drivers/video/fbdev/offb.c       | 98 +++++++++++++++++++++-----------
 3 files changed, 135 insertions(+), 45 deletions(-)


base-commit: 74ee32cc715cd9557c62aba937d6995851c68fe7
prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
prerequisite-patch-id: 6e1032c6302461624f33194c8b8f37103a3fa6ef
prerequisite-patch-id: dbf45768338ff1d944d093dc54bdffb3dc054b44
prerequisite-patch-id: 9c12c87b13a3519a93b81ca18299fae96ae4fefe
prerequisite-patch-id: 3f204510fcbf9530d6540bd8e6128cce598988b6
prerequisite-patch-id: ab7611d28d07723ab1dd392dcf9a6345de3b1040