Implemented Devfreq Boost driver and updated it

+ Made tweaks on Touchscreen Commit taken from my own oreo kernel + those commits below...:- dracarys18/NotKernel@6487d64 diepquynh/android_kernel_samsung_universal8895@01dedde#diff-272079c2e8b8eac022ad16f0ebf9a12f diepquynh/android_kernel_samsung_universal8895@0e4428f#diff-272079c2e8b8eac022ad16f0ebf9a12f diepquynh/android_kernel_samsung_universal8895@5a1ffec#diff-272079c2e8b8eac022ad16f0ebf9a12f diepquynh/android_kernel_samsung_universal8895@87c31dd#diff-272079c2e8b8eac022ad16f0ebf9a12f
THEBOSS619 · Oct 29, 2019 · bfbd348 · bfbd348
1 parent a2328cc
commit bfbd348
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Showing 13 changed files with 547 additions and 21 deletions.
diff --git a/arch/arm64/configs/exynos9810-crownlte_defconfig b/arch/arm64/configs/exynos9810-crownlte_defconfig
@@ -4674,6 +4674,10 @@ CONFIG_ARM_EXYNOS_DEVFREQ_DEBUG=y
 # CONFIG_ARM_EXYNOS_BUS_DEVFREQ is not set
 # CONFIG_PM_DEVFREQ_EVENT is not set
 CONFIG_ARM_EXYNOS9810_BUS_DEVFREQ=y
+CONFIG_DEVFREQ_BOOST=y
+CONFIG_DEVFREQ_INPUT_BOOST_DURATION_MS=100
+CONFIG_DEVFREQ_WAKE_BOOST_DURATION_MS=1000
+CONFIG_DEVFREQ_EXYNOS_MIF_BOOST_FREQ=1014000
 CONFIG_EXTCON=y
 
 #

diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
@@ -169,4 +169,37 @@ config ARM_EXYNOS8890_BUS_DEVFREQ
 	help
 	  This adds the DEVFREQ driver for Exynos8890 memory and int.
 
+config DEVFREQ_BOOST
+	bool "Devfreq Boost"
+	help
+	  Boosts enumerated devfreq devices upon input, and allows for boosting
+	  specific devfreq devices on other custom events. The boost frequencies
+	  for this driver should be set so that frame drops are near-zero at the
+	  boosted frequencies and power consumption is minimized at said
+	  frequencies. The goal of this driver is to provide an interface to
+	  achieve optimal device performance by requesting boosts on key events,
+	  such as when a frame is ready to rendered to the display.
+
+if DEVFREQ_BOOST
+
+config DEVFREQ_INPUT_BOOST_DURATION_MS
+	int "Input boost duration"
+	default "100"
+	help
+	  Input boost duration in milliseconds for all boostable devices.
+
+config DEVFREQ_WAKE_BOOST_DURATION_MS
+	int "Wake boost duration"
+	default "1000"
+	help
+	  Wake boost duration in milliseconds for all boostable devices.
+
+config DEVFREQ_EXYNOS_MIF_BOOST_FREQ
+	int "Boost freq for Exynos MIF device"
+	default "0"
+	help
+	  Boost frequency for the Exynos MIF (DDR) bus.
+
+endif
+
 endif # PM_DEVFREQ
diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
@@ -17,3 +17,6 @@ obj-$(CONFIG_ARM_TEGRA_DEVFREQ)		+= tegra-devfreq.o
 # DEVFREQ Event Drivers
 obj-$(CONFIG_PM_DEVFREQ_EVENT)		+= event/
 obj-$(CONFIG_ARM_EXYNOS_DEVFREQ)	+= exynos/
+
+# DEVFREQ Boost
+obj-$(CONFIG_DEVFREQ_BOOST)		+= devfreq_boost.o
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
@@ -321,10 +321,15 @@ int update_devfreq(struct devfreq *devfreq)
 	if (!devfreq->governor)
 		return -EINVAL;
 
-	/* Reevaluate the proper frequency */
-	err = devfreq->governor->get_target_freq(devfreq, &freq);
-	if (err)
-		return err;
+	if (devfreq->max_boost) {
+		/* Use the max freq for max boosts */
+		freq = ULONG_MAX;
+	} else {
+		/* Reevaluate the proper frequency */
+		err = devfreq->governor->get_target_freq(devfreq, &freq);
+		if (err)
+			return err;
+	}
 
 #if defined(CONFIG_EXYNOS_DVFS_MANAGER)
 	err = find_exynos_devfreq_dm_type(devfreq->dev.parent, &dm_type);
@@ -1181,6 +1186,9 @@ static ssize_t polling_interval_store(struct device *dev,
 
 	if (!df->governor)
 		return -EINVAL;
+	/* Minfreq is managed by devfreq_boost */
+	if (df->is_boost_device)
+		return count;
 
 	ret = sscanf(buf, "%u", &value);
 	if (ret != 1)