Remove adreno idler Algorithm

Our GPU goes to the lowest GPU frequency in idle state using the msm-adreno-tz gpu governor

This reverts commit c64c59b.

Author: rajatgupta1998

arch/arm/configs/athene_defconfig

@@ -3445,7 +3445,6 @@ CONFIG_INOTIFY_USER=y
 # CONFIG_AUTOFS4_FS is not set
 CONFIG_FUSE_FS=y
 # CONFIG_CUSE is not set
-CONFIG_ADRENO_IDLER=y
 
 #
 # Caches

drivers/devfreq/Kconfig

@@ -79,15 +79,6 @@ config DEVFREQ_GOV_MSM_ADRENO_TZ
 	  Sets the frequency using a "on-demand" algorithm.
 	  This governor is unlikely to be useful for other devices.
 
-config ADRENO_IDLER
-	tristate "MSM Adreno idler"
-	depends on DEVFREQ_GOV_MSM_ADRENO_TZ
-	help
-	  Uses a different calculation method on top of Adreno TZ
-	  just for calculating frequency for idle to reduce the
-	  wasted power coming from stock Adreno TZ while
-	  maintaining high-performance.
-
 config MSM_BIMC_BWMON
 	tristate "MSM BIMC Bandwidth monitor hardware"
 	depends on ARCH_MSM

drivers/devfreq/Makefile

@@ -8,7 +8,6 @@ obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE)	+= governor_powersave.o
 obj-$(CONFIG_DEVFREQ_GOV_USERSPACE)	+= governor_userspace.o
 obj-$(CONFIG_DEVFREQ_GOV_CPUFREQ)	+= governor_cpufreq.o
 obj-$(CONFIG_DEVFREQ_GOV_MSM_ADRENO_TZ)	+= governor_msm_adreno_tz.o
-obj-$(CONFIG_ADRENO_IDLER)		+= adreno_idler.o
 obj-$(CONFIG_DEVFREQ_GOV_MSM_CPUFREQ)	+= governor_msm_cpufreq.o
 obj-$(CONFIG_ARCH_MSM_KRAIT)		+= krait-l2pm.o
 obj-$(CONFIG_MSM_BIMC_BWMON)		+= bimc-bwmon.o

drivers/devfreq/adreno_idler.c

@@ -274,10 +274,6 @@ static int tz_init(struct devfreq_msm_adreno_tz_data *priv,
 	return ret;
 }
 
-#ifdef CONFIG_ADRENO_IDLER
-extern int adreno_idler(struct devfreq_dev_status stats, struct devfreq *devfreq,
-		 unsigned long *freq);
-#endif
 static int tz_get_target_freq(struct devfreq *devfreq, unsigned long *freq,
 				u32 *flag)
 {
@@ -295,22 +291,7 @@ static int tz_get_target_freq(struct devfreq *devfreq, unsigned long *freq,
 		return result;
 	}
 
-	/* Prevent overflow */
-	if (stats.busy_time >= (1 << 24) || stats.total_time >= (1 << 24)) {
-		stats.busy_time >>= 7;
-		stats.total_time >>= 7;
-	}
-
 	*freq = stats.current_frequency;
-	*flag = 0;
-
-#ifdef CONFIG_ADRENO_IDLER
-	if (adreno_idler(stats, devfreq, freq)) {
-		/* adreno_idler has asked to bail out now */
-		return 0;
-	}
-#endif
-
 	priv->bin.total_time += stats.total_time;
 	priv->bin.busy_time += stats.busy_time;