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scsi: ufs: qcom: Avoid re-init quirk when gears match 

[ Upstream commit 10a39667a1 ]

On sa8775p-ride, probing the HBA will go through the
UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH path although the power info is
the same during the second init.

The REINIT quirk only applies starting with controller v4. For these,
ufs_qcom_get_hs_gear() reads the highest supported gear when setting the
host_params. After the negotiation, if the host and device are on the same
gear, it is the highest gear supported between the two. Skip REINIT to save
some time.

Signed-off-by: Eric Chanudet <echanude@redhat.com>
Link: https://lore.kernel.org/r/20240123192854.1724905-4-echanude@redhat.com
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Tested-by: Andrew Halaney <ahalaney@redhat.com> # sa8775p-ride
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Chanudet 2024-01-23 14:28:57 -05:00 committed by Greg Kroah-Hartman
parent b788c74135
commit d15def2084
1 changed files with 11 additions and 2 deletions
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13
drivers/ufs/host/ufs-qcom.c
View File

@ -738,8 +738,17 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
* the second init can program the optimal PHY settings. This allows one to start
* the first init with either the minimum or the maximum support gear.
*/
if (hba->ufshcd_state == UFSHCD_STATE_RESET)
host->phy_gear = dev_req_params->gear_tx;
if (hba->ufshcd_state == UFSHCD_STATE_RESET) {
/*
* Skip REINIT if the negotiated gear matches with the
* initial phy_gear. Otherwise, update the phy_gear to
* program the optimal gear setting during REINIT.
*/
if (host->phy_gear == dev_req_params->gear_tx)
hba->quirks &= ~UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
else
host->phy_gear = dev_req_params->gear_tx;
}
/* enable the device ref clock before changing to HS mode */
if (!ufshcd_is_hs_mode(&hba->pwr_info) &&