[PATCH v6 06/10] scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 4 and newer

Can Guo
2023-11-29T08:29:41Z

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.

Signed-off-by: Can Guo <quic_cang@quicinc.com>
---
drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index aca6199..30f4ca6 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1060,6 +1060,20 @@ 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;
+
+ /*
+ * Power up the PHY using the minimum supported gear (UFS_HS_G2).
+ * Switching to max gear will be performed during reinit if supported.
+ */
+ 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 +1310,7 @@ 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 +1328,6 @@ 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:
--
2.7.4