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Commit 1e1a85c4 authored by Venkat Devarasetty's avatar Venkat Devarasetty Committed by Gerrit - the friendly Code Review server
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msm: lpm: do not allow system level modes if pending rpm ack 



Do not allow APSS cores to enter system level mode if there
is a pending acknowledge from RPM. At the same time allow
cores to enter individual power collapse as the cpu collapse
overhead time is low as compared to system level modes.

Change-Id: I6bb4048529690b4ceee8555b27444ece6da82e4a
Signed-off-by: default avatarVenkat Devarasetty <vdevaras@codeaurora.org>
parent 289877fa

drivers/cpuidle/lpm-levels.c

+8 −8
Original line number Diff line number Diff line
@@ -270,14 +270,6 @@ static int cpu_power_select(struct cpuidle_device *dev, 


		if (!allow)

			continue;

		/*

		 * TODO:

		 * use per_cpu pm_qos to prevent low power modes based on

		 * latency

		 */

		if (mode >= MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE)

			if (!dev->cpu && msm_rpm_waiting_for_ack())

				break;



		lvl_latency_us = pwr_params->latency_us;
@@ -386,6 +378,14 @@ static int cluster_select(struct lpm_cluster *cluster, bool from_idle) 
	if (!cluster)

		return -EINVAL;



	/*

	 * TODO:

	 * use per_cpu pm_qos to prevent low power modes based on

	 * latency

	 */

	if (msm_rpm_waiting_for_ack())

		return best_level;



	sleep_us = (uint32_t)get_cluster_sleep_time(cluster, NULL, from_idle);



	if (cpumask_and(&mask, cpu_online_mask, &cluster->child_cpus))