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MIPS: ingenic: rs90: Add dedicated VRAM memory region 

Add a 1 MiB memory area dedicated to the video driver. This area will be
managed by Linux' CMA, so that the ingenic-drm driver can be sure to
always be able to allocate contiguous buffers.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Paul Cercueil 2021-05-30 18:18:02 +01:00 committed by Thomas Bogendoerfer
parent 5e82cf987a
commit 0fe0fbc867
1 changed files with 14 additions and 0 deletions
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14
arch/mips/boot/dts/ingenic/rs90.dts
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@ -16,6 +16,18 @@
reg = <0x0 0x2000000>;
};
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
vmem: video-memory@1f00000 {
compatible = "shared-dma-pool";
reg = <0x1f00000 0x100000>;
reusable;
};
};
vcc: regulator {
compatible = "regulator-fixed";
@ -300,6 +312,8 @@
};
&lcd {
memory-region = <&vmem>;
pinctrl-names = "default";
pinctrl-0 = <&pins_lcd>;
};