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    Subject[PATCH v1 2/3] ufs-qcom: scsi: configure write booster type
    Date
    Configure the WriteBooster type to preserve user-space mode.
    This would ensure that no user-space capacity is reduced
    when write booster is enabled.
    Enable WB for Qualcomm platform.

    Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
    ---
    drivers/scsi/ufs/ufs-qcom.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
    index 19aa5c4..def1e09 100644
    --- a/drivers/scsi/ufs/ufs-qcom.c
    +++ b/drivers/scsi/ufs/ufs-qcom.c
    @@ -1071,6 +1071,7 @@ static void ufs_qcom_set_caps(struct ufs_hba *hba)
    hba->caps |= UFSHCD_CAP_CLK_GATING | UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
    hba->caps |= UFSHCD_CAP_CLK_SCALING;
    hba->caps |= UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
    + hba->caps |= UFSHCD_CAP_WB_EN;

    if (host->hw_ver.major >= 0x2) {
    host->caps = UFS_QCOM_CAP_QUNIPRO |
    @@ -1713,6 +1714,12 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,
    }
    #endif

    +static u32 ufs_qcom_wb_get_user_cap_mode(struct ufs_hba *hba)
    +{
    + /* QCom prefers no user-space reduction mode */
    + return UFS_WB_BUFF_PRESERVE_USER_SPACE;
    +}
    +
    /**
    * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
    *
    @@ -1735,6 +1742,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
    .dbg_register_dump = ufs_qcom_dump_dbg_regs,
    .device_reset = ufs_qcom_device_reset,
    .config_scaling_param = ufs_qcom_config_scaling_param,
    + .wb_get_user_cap_mode = ufs_qcom_wb_get_user_cap_mode,
    };

    /**
    --
    Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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