diff options
| author |   Alexey Brodkin <abrodkin@synopsys.com> | 2016-04-27 16:59:50 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2016-04-29 14:34:13 +0300 |
| commit | cb2ad5e5339c5122166265cea579cc6a356d46de (patch) | |
| tree | bd45a96027bc8f8f1e2e0245bd342978ad03fb7c /arch/arc/boot/dts/axs10x_mb.dtsi | |
| parent | drm/arcpgu: use dedicated memory area for frame buffer (diff) | |
| download | linux-dev-cb2ad5e5339c5122166265cea579cc6a356d46de.tar.xz linux-dev-cb2ad5e5339c5122166265cea579cc6a356d46de.zip | |
ARC: [axs10x] Specify reserved memory for frame buffer
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.
Even though for AXS101 (which sorts ARC770 CPU) IOC is not
an option for a sake of keeping one DT description for the
base-board (axs10x_mb.dtsi) we're still defining reserved
memory location in the very end of DDR.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: devicetree@vger.kernel.org
Diffstat (limited to 'arch/arc/boot/dts/axs10x_mb.dtsi')
| -rw-r--r-- | arch/arc/boot/dts/axs10x_mb.dtsi | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi index 823f15ca68df..64b063d4e996 100644 --- a/arch/arc/boot/dts/axs10x_mb.dtsi +++ b/arch/arc/boot/dts/axs10x_mb.dtsi @@ -283,7 +283,7 @@ encoder-slave = <&adv7511>; clocks = <&pguclk>; clock-names = "pxlclk"; - + memory-region = <&frame_buffer>; port { pgu_output: endpoint { remote-endpoint = <&adv7511_input>; |