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scsi: ufs: host: mediatek: Fix PWM mode switch issue

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Address a failure in switching to PWM mode by ensuring proper
configuration of power modes and adaptation settings. The changes
include checks for SLOW_MODE and adjustments to the desired working mode
and adaptation configuration based on the device's power mode and
hardware version.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20250811131423.3444014-6-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2025-08-11 21:11:21 +08:00 committed by Martin K. Petersen
parent 86a678a251
commit 7212d624f8
1 changed files with 22 additions and 3 deletions
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25
drivers/ufs/host/ufs-mediatek.c
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@ -1321,6 +1321,10 @@ static bool ufs_mtk_pmc_via_fastauto(struct ufs_hba *hba,
dev_req_params->gear_rx < UFS_HS_G4)
return false;
if (dev_req_params->pwr_tx == SLOW_MODE ||
dev_req_params->pwr_rx == SLOW_MODE)
return false;
return true;
}
@ -1336,6 +1340,10 @@ static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
host_params.hs_rx_gear = UFS_HS_G5;
host_params.hs_tx_gear = UFS_HS_G5;
if (dev_max_params->pwr_rx == SLOW_MODE ||
dev_max_params->pwr_tx == SLOW_MODE)
host_params.desired_working_mode = UFS_PWM_MODE;
ret = ufshcd_negotiate_pwr_params(&host_params, dev_max_params, dev_req_params);
if (ret) {
pr_info("%s: failed to determine capabilities\n",
@ -1368,10 +1376,21 @@ static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
}
}
if (host->hw_ver.major >= 3) {
if (dev_req_params->pwr_rx == FAST_MODE ||
dev_req_params->pwr_rx == FASTAUTO_MODE) {
if (host->hw_ver.major >= 3) {
ret = ufshcd_dme_configure_adapt(hba,
dev_req_params->gear_tx,
PA_INITIAL_ADAPT);
} else {
ret = ufshcd_dme_configure_adapt(hba,
dev_req_params->gear_tx,
PA_NO_ADAPT);
}
} else {
ret = ufshcd_dme_configure_adapt(hba,
dev_req_params->gear_tx,
PA_INITIAL_ADAPT);
dev_req_params->gear_tx,
PA_NO_ADAPT);
}
return ret;