From c8760f94680c705146ad2161dea14c7a5940cf34 Mon Sep 17 00:00:00 2001
From: soundcheck <kls.schlz@gmail.com>
Date: Mon, 17 Feb 2014 08:53:07 +0100
Subject: [PATCH] Introduce CONFIG_HZ patches 250|300|1000 Hz for lower
 latency. Default 300Hz enabled

---
 build.sh           |  8 ++++++++
 patch/1000HZ.patch | 11 +++++++++++
 patch/250HZ.patch  | 11 +++++++++++
 patch/300HZ.patch  | 11 +++++++++++
 4 files changed, 41 insertions(+)
 create mode 100644 patch/1000HZ.patch
 create mode 100644 patch/250HZ.patch
 create mode 100644 patch/300HZ.patch

diff --git a/build.sh b/build.sh
index fc2e24f..8ce1f54 100644
--- a/build.sh
+++ b/build.sh
@@ -88,6 +88,14 @@ sed -e 's/usb_detect_type     = 1/usb_detect_type     = 0/g' $DEST/cubie_configs
 sed -e 's/screen0_output_type.*/screen0_output_type     = 3/g' $DEST/cubie_configs/sysconfig/linux/ct.fex > $DEST/cubie_configs/sysconfig/linux/ct-hdmi.fex
 sed -e 's/screen0_output_type.*/screen0_output_type     = 4/g' $DEST/cubie_configs/sysconfig/linux/ct.fex > $DEST/cubie_configs/sysconfig/linux/ct-vga.fex
 
+
+###PATCH kernel CONFIG_HZ, Arm dfault is hardcoded 100hz (10ms latency!). For mulitimedia and desktop a higher frequency is recomended.
+
+#test -f $SRC/patch/250HZ.patch && patch -f $DEST/linux-sunxi/arch/arm/Kconfig < $SRC/patch/250HZ.patch
+test -f $SRC/patch/300HZ.patch && patch -f $DEST/linux-sunxi/arch/arm/Kconfig < $SRC/patch/300HZ.patch
+#test -f $SRC/patch/1000HZ.patch && patch -f $DEST/linux-sunxi/arch/arm/Kconfig < $SRC/patch/1000HZ.patch
+
+
 # Copying Kernel config
 cp $SRC/config/kernel.config $DEST/linux-sunxi/
 
diff --git a/patch/1000HZ.patch b/patch/1000HZ.patch
new file mode 100644
index 0000000..c0cf086
--- /dev/null
+++ b/patch/1000HZ.patch
@@ -0,0 +1,11 @@
+--- ./arch/arm/Kconfig	2014-02-14 11:28:34.504514916 +0100
++++ ./arch/arm/Kconfig.a	2014-02-14 11:28:16.634516659 +0100
+@@ -1698,7 +1698,7 @@
+ 	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
+ 	default AT91_TIMER_HZ if ARCH_AT91
+ 	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
+-	default 100
++	default 1000
+ 
+ config THUMB2_KERNEL
+ 	bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
diff --git a/patch/250HZ.patch b/patch/250HZ.patch
new file mode 100644
index 0000000..01aba76
--- /dev/null
+++ b/patch/250HZ.patch
@@ -0,0 +1,11 @@
+--- ./arch/arm/Kconfig	2014-02-14 11:28:34.504514916 +0100
++++ ./arch/arm/Kconfig.a	2014-02-14 11:28:16.634516659 +0100
+@@ -1698,7 +1698,7 @@
+ 	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
+ 	default AT91_TIMER_HZ if ARCH_AT91
+ 	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
+-	default 100
++	default 250
+ 
+ config THUMB2_KERNEL
+ 	bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
diff --git a/patch/300HZ.patch b/patch/300HZ.patch
new file mode 100644
index 0000000..9d20ff3
--- /dev/null
+++ b/patch/300HZ.patch
@@ -0,0 +1,11 @@
+--- ./arch/arm/Kconfig	2014-02-14 11:28:34.504514916 +0100
++++ ./arch/arm/Kconfig.a	2014-02-14 11:28:16.634516659 +0100
+@@ -1698,7 +1698,7 @@
+ 	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
+ 	default AT91_TIMER_HZ if ARCH_AT91
+ 	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
+-	default 100
++	default 300
+ 
+ config THUMB2_KERNEL
+ 	bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"