[PATCH v1 2/3] ufs-qcom: scsi: configure write booster type

[Asutosh Das]

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@xxxxxxxxxxxxxx>
---
 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,
 };
 
 /**
-- 
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