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Commit daf3903c authored by Suman Tatiraju's avatar Suman Tatiraju
Browse files

PM / devfreq: Check for GPU busy time before sending the sample 



Sometimes GPU busy time is very low during sampling. Accumulate
the statistics and send them with the next sample.

Change-Id: I77e568b48afc3a4922c7c341d9478705b7ae3a30
Signed-off-by: default avatarSuman Tatiraju <sumant@codeaurora.org>
parent c35ae825

drivers/devfreq/governor_msm_adreno_tz.c

+11 −5
Original line number Diff line number Diff line 
/* Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.

/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -29,6 +29,10 @@ static DEFINE_SPINLOCK(tz_lock); 
 * per frame for 60fps content.

 */

#define FLOOR		        5000

/*

 * MIN_BUSY is 1 msec for the sample to be sent

 */

#define MIN_BUSY		1000

#define LONG_FLOOR		50000

#define HIST			5

#define TARGET			80
@@ -116,11 +120,13 @@ static int tz_get_target_freq(struct devfreq *devfreq, unsigned long *freq, 
	/*

	 * Do not waste CPU cycles running this algorithm if

	 * the GPU just started, or if less than FLOOR time

	 * has passed since the last run.

	 * has passed since the last run or the gpu hasn't been

	 * busier than MIN_BUSY.

	 */

	if ((stats.total_time == 0) ||

		(priv->bin.total_time < FLOOR)) {

		return 1;

		(priv->bin.total_time < FLOOR) ||

		(unsigned int) priv->bin.busy_time < MIN_BUSY) {

		return 0;

	}



	level = devfreq_get_freq_level(devfreq, stats.current_frequency);