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Commit dfd06cdf authored by Venkat Gopalakrishnan's avatar Venkat Gopalakrishnan
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scsi: ufs: reduce auto hibern8 timeout to save power 



The PA_Hibern8Time and PA_TActivate time in most devices are well
under 1ms combined thereby the overall hibern8 enter/exit latencies
are under 1ms as well. Entering hibern8 as soon as possible saves
power consumption, hence reduce the auto hibern8 timeout to 1ms.

Change-Id: If58590fc397ec8eb88906c103247bb48710805db
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
parent e9239e3f

drivers/scsi/ufs/ufshcd.c

+2 −1
Original line number Diff line number Diff line
@@ -1948,6 +1948,7 @@ static void ufshcd_init_hibern8_on_idle(struct ufs_hba *hba) 
		return;



	if (ufshcd_is_auto_hibern8_supported(hba)) {

		hba->hibern8_on_idle.delay_ms = 1;

		hba->hibern8_on_idle.state = AUTO_HIBERN8;

		/*

		 * Disable SW hibern8 enter on idle in case
@@ -1955,13 +1956,13 @@ static void ufshcd_init_hibern8_on_idle(struct ufs_hba *hba) 
		 */

		hba->caps &= ~UFSHCD_CAP_HIBERN8_ENTER_ON_IDLE;

	} else {

		hba->hibern8_on_idle.delay_ms = 10;

		INIT_DELAYED_WORK(&hba->hibern8_on_idle.enter_work,

				  ufshcd_hibern8_enter_work);

		INIT_WORK(&hba->hibern8_on_idle.exit_work,

			  ufshcd_hibern8_exit_work);

	}



	hba->hibern8_on_idle.delay_ms = 10;

	hba->hibern8_on_idle.is_enabled = true;



	hba->hibern8_on_idle.delay_attr.show =