From: Peter Wang <peter.wang@xxxxxxxxxxxx>
Mediatek tx skew issue fix by check dts setting and vendor/model.
Then set PA_TACTIVATE set 8
Signed-off-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
---
drivers/ufs/host/ufs-mediatek.c | 21 +++++++++++++++++++++
drivers/ufs/host/ufs-mediatek.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 6fc6fa2ea5bd..0262e8994236 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -119,6 +119,13 @@ static bool ufs_mtk_is_pmc_via_fastauto(struct ufs_hba *hba)
return !!(host->caps & UFS_MTK_CAP_PMC_VIA_FASTAUTO);
}
+static bool ufs_mtk_is_tx_skew_fix(struct ufs_hba *hba)
+{
+ struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+
+ return !!(host->caps & UFS_MTK_CAP_TX_SKEW_FIX);
+}
+
static bool ufs_mtk_is_allow_vccqx_lpm(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@@ -630,6 +637,9 @@ static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
if (of_property_read_bool(np, "mediatek,ufs-pmc-via-fastauto"))
host->caps |= UFS_MTK_CAP_PMC_VIA_FASTAUTO;
+ if (of_property_read_bool(np, "mediatek,ufs-tx-skew-fix"))
+ host->caps |= UFS_MTK_CAP_TX_SKEW_FIX;
+
dev_info(hba->dev, "caps: 0x%x", host->caps);
}
@@ -1423,6 +1433,17 @@ static int ufs_mtk_apply_dev_quirks(struct ufs_hba *hba)
if (mid == UFS_VENDOR_SAMSUNG) {
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), 6);
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HIBERN8TIME), 10);
+ } else if (mid == UFS_VENDOR_MICRON) {
+ /* Only for the host which have TX skew issue */
+ if (ufs_mtk_is_tx_skew_fix(hba) &&
+ (STR_PRFX_EQUAL("MT128GBCAV2U31", dev_info->model) ||
+ STR_PRFX_EQUAL("MT256GBCAV4U31", dev_info->model) ||
+ STR_PRFX_EQUAL("MT512GBCAV8U31", dev_info->model) ||
+ STR_PRFX_EQUAL("MT256GBEAX4U40", dev_info->model) ||
+ STR_PRFX_EQUAL("MT512GAYAX4U40", dev_info->model) ||
+ STR_PRFX_EQUAL("MT001TAYAX8U40", dev_info->model))) {
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), 8);
+ }
}
/*
diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h
index 0720da2f1402..146c25080599 100644
--- a/drivers/ufs/host/ufs-mediatek.h
+++ b/drivers/ufs/host/ufs-mediatek.h
@@ -142,6 +142,7 @@ enum ufs_mtk_host_caps {
*/
UFS_MTK_CAP_ALLOW_VCCQX_LPM = 1 << 5,
UFS_MTK_CAP_PMC_VIA_FASTAUTO = 1 << 6,
+ UFS_MTK_CAP_TX_SKEW_FIX = 1 << 7,
};
struct ufs_mtk_crypt_cfg {
--
2.18.0
