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From 2df4dba8faa9a781a5a1c6c09d646d2b692c9a0c Mon Sep 17 00:00:00 2001
From: Loren Huang <b02279@freescale.com>
Date: Tue, 4 Jun 2013 15:08:15 +0800
Subject: [PATCH 2/6] ENGR00265465 gpu:Add global value for minimum 3D clock
export
Add global value gpu3DMinClock so that minimum 3D clock can be change by user.
When gpu min clock is too low, it may cause IPU starvation issue in certain case.
Use echo x > /sys/module/galcore/parameters/gpu3DMinClock to change it.
Cherry-pick from 3.0.35 branch.
Upstream-Status: Backport [3.5.7-1.0.0]
Signed-off-by: Loren Huang <b02279@freescale.com>
Acked-by: Lily Zhang
---
drivers/mxc/gpu-viv/arch/XAQ2/hal/kernel/gc_hal_kernel_hardware.c | 6 +++++-
drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_driver.c | 3 +++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mxc/gpu-viv/arch/XAQ2/hal/kernel/gc_hal_kernel_hardware.c b/drivers/mxc/gpu-viv/arch/XAQ2/hal/kernel/gc_hal_kernel_hardware.c
index 3829999..ebd36fe 100644
--- a/drivers/mxc/gpu-viv/arch/XAQ2/hal/kernel/gc_hal_kernel_hardware.c
+++ b/drivers/mxc/gpu-viv/arch/XAQ2/hal/kernel/gc_hal_kernel_hardware.c
@@ -36,6 +36,7 @@ typedef struct _gcsiDEBUG_REGISTERS
}
gcsiDEBUG_REGISTERS;
+extern int gpu3DMinClock;
/******************************************************************************\
********************************* Support Code *********************************
\******************************************************************************/
@@ -4630,7 +4631,10 @@ gckHARDWARE_GetFscaleValue(
)
{
*FscaleValue = Hardware->powerOnFscaleVal;
- *MinFscaleValue = 1;
+ if ((gpu3DMinClock > 0) && (gpu3DMinClock <= 64) && (Hardware->core == gcvCORE_MAJOR))
+ *MinFscaleValue = gpu3DMinClock;
+ else
+ *MinFscaleValue = 1;
*MaxFscaleValue = 64;
return gcvSTATUS_OK;
diff --git a/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_driver.c b/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_driver.c
index 2ed3d0e..64cace1 100644
--- a/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_driver.c
+++ b/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_driver.c
@@ -146,6 +146,9 @@ module_param(logFileSize,uint, 0644);
static int showArgs = 0;
module_param(showArgs, int, 0644);
+int gpu3DMinClock = 0;
+module_param(gpu3DMinClock, int, 0644);
+
#if ENABLE_GPU_CLOCK_BY_DRIVER
unsigned long coreClock = 156000000;
module_param(coreClock, ulong, 0644);
--
1.8.3.2
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