Commit a0cea833 authored by Asutosh Das's avatar Asutosh Das Committed by Martin K. Petersen
Browse files

scsi: ufs: ufs-qcom: Enter and exit hibern8 during clock scaling 

Qualcomm controller needs to be in hibern8 before scaling clocks.  This
change puts the controller in hibern8 state before scaling and brings it
out after scaling of clocks.

Link: https://lore.kernel.org/r/212b7aaf6d834c4a8c682fdac4a59b84013ed573.1632818942.git.nguyenb@codeaurora.org


Reviewed-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
Signed-off-by: default avatarBao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 525943a5

drivers/scsi/ufs/ufs-qcom.c

+11 −1
Original line number Diff line number Diff line
@@ -1212,24 +1212,34 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, 
	int err = 0;



	if (status == PRE_CHANGE) {

		err = ufshcd_uic_hibern8_enter(hba);

		if (err)

			return err;

		if (scale_up)

			err = ufs_qcom_clk_scale_up_pre_change(hba);

		else

			err = ufs_qcom_clk_scale_down_pre_change(hba);

		if (err)

			ufshcd_uic_hibern8_exit(hba);



	} else {

		if (scale_up)

			err = ufs_qcom_clk_scale_up_post_change(hba);

		else

			err = ufs_qcom_clk_scale_down_post_change(hba);



		if (err || !dev_req_params)



		if (err || !dev_req_params) {

			ufshcd_uic_hibern8_exit(hba);

			goto out;

		}



		ufs_qcom_cfg_timers(hba,

				    dev_req_params->gear_rx,

				    dev_req_params->pwr_rx,

				    dev_req_params->hs_rate,

				    false);

		ufshcd_uic_hibern8_exit(hba);

	}



out: