[PATCH 0/2 v2] drm/arcpgu: Get use of dedicated memory area for frame buffer

[Alexey Brodkin]

This mini-series allows to allocate frame buffer memory in desired
location. Allocation of a frame buffer memory in a special memory region
allows bypassing of so-called IO Coherency aperture which is typically set
as a range 0x8z-0xAz.

I.e. all data traffic to PGU bypasses IO Coherency block
and saves its bandwidth for other peripherals.

Cc: Dave Airlie <airlied@xxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx

Changes v1 -> v2:
 * Reserved memory size bumped from 16Mb to 32Mb.

 * Reserved area in AXS103 boards moved to the very end of available DDR.

Alexey Brodkin (2):
  drm/arcpgu: use dedicated memory area for frame buffer
  ARC: [axs10x] Specify reserved memory for frame buffer

 arch/arc/boot/dts/axc001.dtsi     | 22 ++++++++++++++++++++--
 arch/arc/boot/dts/axc003.dtsi     | 14 ++++++++++++++
 arch/arc/boot/dts/axc003_idu.dtsi | 14 ++++++++++++++
 arch/arc/boot/dts/axs10x_mb.dtsi  |  2 +-
 drivers/gpu/drm/arc/arcpgu_drv.c  |  6 ++++++
 5 files changed, 55 insertions(+), 3 deletions(-)

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2.5.5