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scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 4 and newer

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Since HW ver 4, max HS gear can be get from UFS host controller's register,
use the max HS gear as the initial PHY gear instead of UFS_HS_G2, so that
we don't need to update the hard code for newer targets in future.

Reviewed-by: Nitin Rawat <quic_nitirawa@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Link: https://lore.kernel.org/r/1701520577-31163-7-git-send-email-quic_cang@quicinc.com
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Can Guo 2023-12-02 04:36:12 -08:00 committed by Martin K. Petersen
parent 9d8528a833
commit 0bd3cb895d
1 changed files with 17 additions and 6 deletions
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23
drivers/ufs/host/ufs-qcom.c
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@ -1060,6 +1060,22 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
}
static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
{
struct ufs_host_params *host_params = &host->host_params;
host->phy_gear = host_params->hs_tx_gear;
/*
* For controllers whose major HW version is < 4, power up the PHY using
* minimum supported gear (UFS_HS_G2). Switching to max gear will be
* performed during reinit if supported. For newer controllers, whose
* major HW version is >= 4, power up the PHY using max supported gear.
*/
if (host->hw_ver.major < 0x4)
host->phy_gear = UFS_HS_G2;
}
static void ufs_qcom_set_host_params(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
@ -1296,6 +1312,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
ufs_qcom_set_caps(hba);
ufs_qcom_advertise_quirks(hba);
ufs_qcom_set_host_params(hba);
ufs_qcom_set_phy_gear(host);
err = ufs_qcom_ice_init(host);
if (err)
@ -1313,12 +1330,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
dev_warn(dev, "%s: failed to configure the testbus %d\n",
__func__, err);
/*
* Power up the PHY using the minimum supported gear (UFS_HS_G2).
* Switching to max gear will be performed during reinit if supported.
*/
host->phy_gear = UFS_HS_G2;
return 0;
out_variant_clear: