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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.patch75
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";
++ };
+ };