diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch b/target/linux/brcm2708/patches-4.4/0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch new file mode 100644 index 0000000000..797023d037 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch @@ -0,0 +1,75 @@ +From 937dd48dd631d45dbee39853dcb1cd98220bb1e5 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Sun, 24 Apr 2016 17:28:15 +0100 +Subject: [PATCH 305/381] drm/vc4: Add DT parameters to control CMA usage + +Example: dtoverlay=vc4-kms-v3d,cma-128 + +See: https://github.com/raspberrypi/linux/pull/1431 + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + arch/arm/boot/dts/overlays/README | 8 +++-- + arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts | 36 ++++++++++++++++++++++ + 2 files changed, 42 insertions(+), 2 deletions(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -1023,8 +1023,12 @@ Name: vc4-kms-v3d + Info: Enable Eric Anholt's DRM VC4 HDMI/HVS/V3D driver. Running startx or + booting to GUI while this overlay is in use will cause interesting + lockups. +-Load: dtoverlay=vc4-kms-v3d +-Params: <None> ++Load: dtoverlay=vc4-kms-v3d,<param> ++Params: cma-256 CMA is 256MB, 256MB-aligned (needs 1GB) ++ cma-192 CMA is 192MB, 256MB-aligned (needs 1GB) ++ cma-128 CMA is 128MB, 128MB-aligned ++ cma-96 CMA is 96MB, 128MB-aligned ++ cma-64 CMA is 64MB, 64MB-aligned + + + Name: vga666 +--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts ++++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts +@@ -94,4 +94,40 @@ + bootargs = "cma=256M@256M"; + }; + }; ++ ++ fragment@5 { ++ target-path = "/chosen"; ++ __dormant__ { ++ bootargs = "cma=192M@256M"; ++ }; ++ }; ++ ++ fragment@6 { ++ target-path = "/chosen"; ++ __dormant__ { ++ bootargs = "cma=128M@128M"; ++ }; ++ }; ++ ++ fragment@7 { ++ target-path = "/chosen"; ++ __dormant__ { ++ bootargs = "cma=96M@128M"; ++ }; ++ }; ++ ++ fragment@8 { ++ target-path = "/chosen"; ++ __dormant__ { ++ bootargs = "cma=64M@64M"; ++ }; ++ }; ++ ++ __overrides__ { ++ cma-256 = <0>,"+4-5-6-7-8"; ++ cma-192 = <0>,"-4+5-6-7-8"; ++ cma-128 = <0>,"-4-5+6-7-8"; ++ cma-96 = <0>,"-4-5-6+7-8"; ++ cma-64 = <0>,"-4-5-6-7+8"; ++ }; + }; |