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Commit b15fe8e0 authored by Mahesh Sivasubramanian's avatar Mahesh Sivasubramanian
Browse files

msm: lpm-levels: Fix issue with coresight save/restore 



The coresight save/restore functions needs to be called when the L2 of the
respective clusters are placed in power collapse/GDHS. On a multi-cluster
system, keeping track of this using a static variable could result in
incorrect save/restore of CTI registers. Fix by using a variable
associated with a cluster.

Change-Id: Ib4ba5790af2a9e3bc245f1ef5010930b5cf4921c
Signed-off-by: default avatarMahesh Sivasubramanian <msivasub@codeaurora.org>
parent e92aa60f

drivers/cpuidle/lpm-levels.c

+6 −8
Original line number Diff line number Diff line
@@ -189,29 +189,27 @@ int set_l2_mode(struct low_power_ops *ops, int mode, bool notify_rpm) 
{

	int lpm = mode;

	int rc = 0;

	static bool coresight_saved;



	ops->tz_flag = MSM_SCM_L2_ON;

	if (ops->tz_flag == MSM_SCM_L2_OFF ||

			ops->tz_flag == MSM_SCM_L2_GDHS)

		coresight_cti_ctx_restore();





	switch (mode) {

	case MSM_SPM_MODE_POWER_COLLAPSE:

		ops->tz_flag = MSM_SCM_L2_OFF;

		coresight_cti_ctx_save();

		coresight_saved = true;

		break;

	case MSM_SPM_MODE_GDHS:

		ops->tz_flag = MSM_SCM_L2_GDHS;

		coresight_cti_ctx_save();

		coresight_saved = true;

		break;

	case MSM_SPM_MODE_RETENTION:

	case MSM_SPM_MODE_DISABLED:

		if (coresight_saved) {

			coresight_cti_ctx_restore();

			coresight_saved = false;

		}

		ops->tz_flag = MSM_SCM_L2_ON;

		break;

	default:

		ops->tz_flag = MSM_SCM_L2_ON;

		lpm = MSM_SPM_MODE_DISABLED;

		break;

	}