[PATCH 0/4] Marvell Dove DRM for DT

Sebastian Hesselbarth sebastian.hesselbarth at gmail.com
Tue Jul 1 06:04:27 PDT 2014

Thanks to Russell we have Armada DRM driver but currently DT support
for it is stalled in various discussions/improvements. We know there
are issues with the whole DRM chain (si5351,lcd,tda998x) that are not
easy to track down. To get at least some more code testing coverage,
this patch set picks up some patches from Russell slightly reworked
to allow Dove DT to register and use Armada DRM.

The approach taken is based on what we did in the past for mach-dove
to mach-mvebu/dove conversion: platform_devices are registered like
it was before DT and quirks are added to allow to register the
corresponsing device properly. Then we start removing each of the
quirks incrementally.

Russell currently has a quite huge gap [1,2,3] between his branch and
mainline Linux, so this is a tiny step forward to closen the gap and
free some of his time for more controversal discussion. Also, it will
allow us to participate in those discussions as we'll be able to test
them more easily.

Patches 1-3 add DT binding docs and corresponding nodes for the
LCD controllers found on Marvell Dove SoCs. The binding itself is
considered stable and not likely to change in the future.

Patch 4 then adds above platform_device registration for DRM driver
to Dove DT based setup. Currently, we require to steal some CMA mem
for the framebuffers, collect lcd resources, and clocks from
different nodes. As soon as DT for DRM driver and component framework
have settled, we can remove the quirks again.

Patches are based on v3.16-rc1 and have been tested on DT SolidRun


[1] http://lkml.kernel.org/r/20140630142516.GA32514@n2100.arm.linux.org.uk
[2] http://lkml.kernel.org/r/20140630165615.GE32514@n2100.arm.linux.org.uk
[3] http://lkml.kernel.org/r/20140630193540.GG32514@n2100.arm.linux.org.uk

Russell King (4):
  dt-bindings: add Marvell Dove LCD controller documentation
  ARM: dts: dove: add DT LCD controllers
  ARM: dts: dove: enable lcd0 on SolidRun CuBox
  ARM: mvebu: add armada drm init to Dove board setup

 .../bindings/drm/armada/marvell,dove-lcd.txt       |   14 ++++
 arch/arm/boot/dts/dove-cubox.dts                   |    6 ++
 arch/arm/boot/dts/dove.dtsi                        |   14 ++++
 arch/arm/mach-mvebu/dove.c                         |   70 +++++++++++++++++++-
 4 files changed, 103 insertions(+), 1 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/drm/armada/marvell,dove-lcd.txt

Cc: Rob Herring <robh+dt at kernel.org>
Cc: Pawel Moll <pawel.moll at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Ian Campbell <ijc+devicetree at hellion.org.uk>
Cc: Kumar Gala <galak at codeaurora.org>
Cc: Randy Dunlap <rdunlap at infradead.org>
Cc: Russell King <rmk+kernel at arm.linux.org.uk>
Cc: Jason Cooper <jason at lakedaemon.net>
Cc: Andrew Lunn <andrew at lunn.ch>
Cc: Gregory Clement <gregory.clement at free-electrons.com>
Cc: devicetree at vger.kernel.org
Cc: linux-doc at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org

More information about the linux-arm-kernel mailing list