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Commit 8e57dcda authored by Asutosh Das's avatar Asutosh Das Committed by Todd Kjos
Browse files

FROMLIST: scsi: 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.

Bug: 143136976
Link: https://lore.kernel.org/lkml/1571849351-819-2-git-send-email-asutoshd@codeaurora.org/


Change-Id: I0a0903ff1dcc6edef1ac5ab32c3e943828b42a7e
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
parent 38c1605e

drivers/scsi/ufs/ufs-qcom.c

+11 −1
Original line number Diff line number Diff line
@@ -1305,18 +1305,27 @@ 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,
@@ -1324,6 +1333,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, 
				    dev_req_params->hs_rate,

				    false);

		ufs_qcom_update_bus_bw_vote(host);

		ufshcd_uic_hibern8_exit(hba);

	}



out: