From: Po-Wen Kao <powen.kao@xxxxxxxxxxxx>
Add new mediatek host cap UFS_MTK_CAP_DISABLE_MCQ to allow disable
MCQ feature by assigning dts boolean property
"mediatek,ufs-disable-mcq""
Acked-by: Chun-Hung Wu <Chun-Hung.Wu@xxxxxxxxxxxx>
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>
Reviewed-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
Signed-off-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
Signed-off-by: Po-Wen Kao <powen.kao@xxxxxxxxxxxx>
---
drivers/ufs/host/ufs-mediatek.c | 12 ++++++++++++
drivers/ufs/host/ufs-mediatek.h | 1 +
2 files changed, 13 insertions(+)
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 25bf5a13cddd..2ee7881533ec 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -640,6 +640,9 @@ static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
if (of_property_read_bool(np, "mediatek,ufs-tx-skew-fix"))
host->caps |= UFS_MTK_CAP_TX_SKEW_FIX;
+ if (of_property_read_bool(np, "mediatek,ufs-disable-mcq"))
+ host->caps |= UFS_MTK_CAP_DISABLE_MCQ;
+
dev_info(hba->dev, "caps: 0x%x", host->caps);
}
@@ -874,6 +877,9 @@ static void ufs_mtk_init_mcq_irq(struct ufs_hba *hba)
host->mcq_nr_intr = UFSHCD_MAX_Q_NR;
pdev = container_of(hba->dev, struct platform_device, dev);
+ if (host->caps & UFS_MTK_CAP_DISABLE_MCQ)
+ goto failed;
+
for (i = 0; i < host->mcq_nr_intr; i++) {
/* irq index 0 is legacy irq, sq/cq irq start from index 1 */
irq = platform_get_irq(pdev, i + 1);
@@ -1585,6 +1591,12 @@ static int ufs_mtk_clk_scale_notify(struct ufs_hba *hba, bool scale_up,
static int ufs_mtk_get_hba_mac(struct ufs_hba *hba)
{
+ struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+
+ /* MCQ operation not permitted */
+ if (host->caps & UFS_MTK_CAP_DISABLE_MCQ)
+ return -EPERM;
+
return MAX_SUPP_MAC;
}
diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h
index c1acbfc5568f..3f698af5f5ac 100644
--- a/drivers/ufs/host/ufs-mediatek.h
+++ b/drivers/ufs/host/ufs-mediatek.h
@@ -144,6 +144,7 @@ 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,
+ UFS_MTK_CAP_DISABLE_MCQ = 1 << 8,
};
struct ufs_mtk_crypt_cfg {
--
2.18.0
