From 0d5d8f373125e5bdf331d8fc579b2cf18171c1c0 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Tue, 3 Aug 2021 11:32:30 +0100 Subject: [PATCH] overlays: Reduce Pi 4 vc4 CMA size to 320MB Reduce the default CMA allocation requested by the vc4-kms-v3d-pi4 and vc4-fkms-v3d-pi4 overlays to 320MB. Use magic values of the form (*64 - 4)MB to encode default values of *64MB, allowing these defaults to be distinguished from values set explicitly by the user with the usual overlay parameters (e.g. "cma-384"). Only default values will be capped if the Pi RAM is too small or the gpu_mem setting too large for it to be viable. Signed-off-by: Phil Elwell --- arch/arm/boot/dts/overlays/vc4-fkms-v3d-pi4-overlay.dts | 2 +- arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/arch/arm/boot/dts/overlays/vc4-fkms-v3d-pi4-overlay.dts +++ b/arch/arm/boot/dts/overlays/vc4-fkms-v3d-pi4-overlay.dts @@ -8,7 +8,7 @@ #include "cma-overlay.dts" &frag0 { - size = <(512*1024*1024)>; + size = <((320-4)*1024*1024)>; }; / { --- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts +++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts @@ -10,7 +10,7 @@ #include "cma-overlay.dts" &frag0 { - size = <(512*1024*1024)>; + size = <((320-4)*1024*1024)>; }; / {