diff options
| -rw-r--r-- | drivers/scsi/ufs/cdns-pltfrm.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c index 993519080a84..b2af04c57a39 100644 --- a/drivers/scsi/ufs/cdns-pltfrm.c +++ b/drivers/scsi/ufs/cdns-pltfrm.c @@ -78,6 +78,31 @@ static int cdns_ufs_hce_enable_notify(struct ufs_hba *hba, } /** + * Called before and after Link startup is carried out. + * @hba: host controller instance + * @status: notify stage (pre, post change) + * + * Return zero for success and non-zero for failure + */ +static int cdns_ufs_link_startup_notify(struct ufs_hba *hba, + enum ufs_notify_change_status status) +{ + if (status != PRE_CHANGE) + return 0; + + /* + * Some UFS devices have issues if LCC is enabled. + * So we are setting PA_Local_TX_LCC_Enable to 0 + * before link startup which will make sure that both host + * and device TX LCC are disabled once link startup is + * completed. + */ + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0); + + return 0; +} + +/** * cdns_ufs_init - performs additional ufs initialization * @hba: host controller instance * @@ -114,12 +139,14 @@ static int cdns_ufs_m31_16nm_phy_initialization(struct ufs_hba *hba) static const struct ufs_hba_variant_ops cdns_ufs_pltfm_hba_vops = { .name = "cdns-ufs-pltfm", .hce_enable_notify = cdns_ufs_hce_enable_notify, + .link_startup_notify = cdns_ufs_link_startup_notify, }; static const struct ufs_hba_variant_ops cdns_ufs_m31_16nm_pltfm_hba_vops = { .name = "cdns-ufs-pltfm", .init = cdns_ufs_init, .hce_enable_notify = cdns_ufs_hce_enable_notify, + .link_startup_notify = cdns_ufs_link_startup_notify, .phy_initialization = cdns_ufs_m31_16nm_phy_initialization, }; |