MediaTek platform and UFS controller can dynamically customize
the delay for host enabling according to different scenarios.
For example, for host initialization with low-level MPHY calibration
required, longer delay shall be expected. But the delay could be removed
if such MPHY calibration can be skipped, like resume flow.
Signed-off-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
---
arch/arm64/configs/defconfig | 1 +
drivers/scsi/ufs/ufs-mediatek.c | 14 ++++++++++++++
2 files changed, 15 insertions(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 0a8a2ad94bef..9306f658a6cd 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -235,6 +235,7 @@ CONFIG_SCSI_MPT3SAS=m
CONFIG_SCSI_UFSHCD=y
CONFIG_SCSI_UFSHCD_PLATFORM=y
CONFIG_SCSI_UFS_QCOM=m
+CONFIG_SCSI_UFS_MEDIATEK=m
CONFIG_SCSI_UFS_HISI=y
CONFIG_ATA=y
CONFIG_SATA_AHCI=y
diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index 0ff6781654fd..6f437f0091bf 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -71,6 +71,19 @@ static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
}
}
+static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
+ enum ufs_notify_change_status status)
+{
+ if (status == PRE_CHANGE) {
+ if (hba->pm_op_in_progress)
+ hba->hba_enable_delay_us = 0;
+ else
+ hba->hba_enable_delay_us = 100;
+ }
+
+ return 0;
+}
+
static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@@ -552,6 +565,7 @@ static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
.name = "mediatek.ufshci",
.init = ufs_mtk_init,
.setup_clocks = ufs_mtk_setup_clocks,
+ .hce_enable_notify = ufs_mtk_hce_enable_notify,
.link_startup_notify = ufs_mtk_link_startup_notify,
.pwr_change_notify = ufs_mtk_pwr_change_notify,
.apply_dev_quirks = ufs_mtk_apply_dev_quirks,
--
2.18.0
