ARM: configs: flo: Go back to 100Hz

On the low-class hardware like flo this only introduces issues
and performance degradation due to increased scheduler overhead.

Revert "arm: configs: flo: set CONFIG_HZ to 300"

This reverts commit 029a1baa6f.

Revert "ARM: msm: flo: fix idle_timeout value to 100ms"

This reverts commit a63fd90f21.

Revert "msm: kgsl: Fix direct references to HZ"

This reverts commit 38d48e1127.

Change-Id: Ib65977c959bff9cce43f5039f8f543e074992fec

Documentation/devicetree/bindings/gpu/adreno.txt

@@ -63,7 +63,7 @@ Optional Properties:
 - qcom,initial-powerlevel: This value indicates which qcom,gpu-pwrlevel should be used at start time
 			   and when coming back out of resume
 - qcom,step-pwrlevel:	   How many qcom,gpu-pwrlevel should be decremented at once
-- qcom,idle-timeout:	   This property represents the time in milliseconds for idle timeout.
+- qcom,idle-timeout:	   This property represents the time in microseconds for idle timeout.
 - qcom,chipid:		   If it exists this property is used to replace
 			   the chip identification read from the GPU hardware.
 			   This is used to override faulty hardware readings.

arch/arm/Kconfig

@@ -1695,7 +1695,15 @@ config ARCH_NR_GPIO
 	  If unsure, leave the default value.
 
 source kernel/Kconfig.preempt
-source kernel/Kconfig.hz
+
+config HZ
+	int
+	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
+		ARCH_S5PV210 || ARCH_EXYNOS4
+	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
 
 config THUMB2_KERNEL
 	bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"

arch/arm/configs/lineageos_flo_defconfig

@@ -91,7 +91,6 @@ CONFIG_SMP=y
 # CONFIG_SMP_ON_UP is not set
 CONFIG_SCHED_MC=y
 CONFIG_PREEMPT=y
-CONFIG_HZ_300=y
 CONFIG_AEABI=y
 # CONFIG_OABI_COMPAT is not set
 CONFIG_HIGHMEM=y

arch/arm/mach-msm/asustek/flo/board-flo-gpu.c

@@ -254,7 +254,7 @@ static struct kgsl_device_platform_data kgsl_3d0_pdata = {
 	.init_level = 1,
 	.num_levels = 5,
 	.set_grp_async = NULL,
-	.idle_timeout = 100,
+	.idle_timeout = HZ/10,
 	.strtstp_sleepwake = true,
 	.clk_map = KGSL_CLK_CORE | KGSL_CLK_IFACE | KGSL_CLK_MEM_IFACE,
 #ifdef CONFIG_MSM_BUS_SCALING

drivers/gpu/msm/adreno.c

@@ -1439,7 +1439,7 @@ static int adreno_of_get_pdata(struct platform_device *pdev)
 
 	if (adreno_of_read_property(pdev->dev.of_node, "qcom,idle-timeout",
 		&pdata->idle_timeout))
-		pdata->idle_timeout = 80;
+		pdata->idle_timeout = HZ/12;
 
 	pdata->strtstp_sleepwake = of_property_read_bool(pdev->dev.of_node,
 						"qcom,strtstp-sleepwake");

drivers/gpu/msm/kgsl_device.h

@@ -30,6 +30,8 @@
 #define KGSL_TIMEOUT_PART           50 /* 50 msec */
 #define KGSL_TIMEOUT_LONG_IB_DETECTION  2000 /* 2 sec*/
 
+#define FIRST_TIMEOUT (HZ / 2)
+
 
 /* KGSL device state is initialized to INIT when platform_probe		*
  * sucessfully initialized the device.  Once a device has been opened	*

drivers/gpu/msm/kgsl_pwrctrl.c

@@ -491,6 +491,7 @@ static int kgsl_pwrctrl_idle_timer_store(struct device *dev,
 	unsigned long val;
 	struct kgsl_device *device = kgsl_device_from_dev(dev);
 	struct kgsl_pwrctrl *pwr;
+	const long div = 1000/HZ;
 	int rc;
 
 	if (device == NULL)
@@ -505,8 +506,9 @@ static int kgsl_pwrctrl_idle_timer_store(struct device *dev,
 
 	mutex_lock(&device->mutex);
 
-	/* Let the timeout be requested in jiffies */
-	pwr->interval_timeout = msecs_to_jiffies(val);
+	/* Let the timeout be requested in ms, but convert to jiffies. */
+	val /= div;
+	pwr->interval_timeout = val;
 
 	mutex_unlock(&device->mutex);
 
@@ -518,11 +520,12 @@ static int kgsl_pwrctrl_idle_timer_show(struct device *dev,
 					char *buf)
 {
 	struct kgsl_device *device = kgsl_device_from_dev(dev);
+	int mul = 1000/HZ;
 	if (device == NULL)
 		return 0;
-	/* Show the idle_timeout in msec */
+	/* Show the idle_timeout converted to msec */
 	return snprintf(buf, PAGE_SIZE, "%d\n",
-		jiffies_to_msecs(device->pwrctrl.interval_timeout));
+		device->pwrctrl.interval_timeout * mul);
 }
 
 static int kgsl_pwrctrl_pmqos_latency_store(struct device *dev,
@@ -1080,7 +1083,7 @@ int kgsl_pwrctrl_init(struct kgsl_device *device)
 	pwr->power_flags = 0;
 
 	pwr->idle_needed = pdata->idle_needed;
-	pwr->interval_timeout = msecs_to_jiffies(pdata->idle_timeout);
+	pwr->interval_timeout = pdata->idle_timeout;
 	pwr->strtstp_sleepwake = pdata->strtstp_sleepwake;
 	pwr->ebi1_clk = clk_get(&pdev->dev, "bus_clk");
 	if (IS_ERR(pwr->ebi1_clk))
@@ -1631,7 +1634,7 @@ int kgsl_active_count_wait(struct kgsl_device *device, int count)
 		int ret;
 		mutex_unlock(&device->mutex);
 		ret = wait_event_timeout(device->active_cnt_wq,
-			_check_active_count(device, count), msecs_to_jiffies(1000));
+			_check_active_count(device, count), HZ);
 		mutex_lock(&device->mutex);
 		result = ret == 0 ? -ETIMEDOUT : 0;
 	}