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| author |  Po-Wen Kao <powen.kao@mediatek.com>
| 2022-06-23 11:50:49 +0800 |
|---|---|---|
| committer |  Martin K. Petersen <martin.petersen@oracle.com>
| 2022-06-27 23:17:36 -0400 |
| commit | 4918694ccd6974f3ec8eeda3f34ace0ce480153e (patch) | |
| tree | 45904f522038a4a3f883bb9c6c6ab85aef15af26 /drivers/ufs | |
| parent | scsi: ufs: ufs-mediatek: Add stage information for ref-clk control (diff) | |
| download | linux-4918694ccd6974f3ec8eeda3f34ace0ce480153e.tar.gz linux-4918694ccd6974f3ec8eeda3f34ace0ce480153e.tar.bz2 linux-4918694ccd6974f3ec8eeda3f34ace0ce480153e.zip | |
scsi: ufs: ufs-mediatek: Disable reset confirm feature by UniPro
In MediaTek UFS platforms, UniPro will not return reset confirm if it is in
POWERDOWN state thus hang issue may happen while disabling UFSHCI. Simply
disable this feature before UniPro leaves POWERDOWN state.
Link: https://lore.kernel.org/r/20220623035052.18802-6-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs')
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 0cc7d4faccec..a7482f530f27 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1079,6 +1079,11 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba) { int err; + /* Disable reset confirm feature by UniPro */ + ufshcd_writel(hba, + (ufshcd_readl(hba, REG_UFS_XOUFS_CTRL) & ~0x100), + REG_UFS_XOUFS_CTRL); + err = ufs_mtk_unipro_set_lpm(hba, true); if (err) { /* Resume UniPro state for following error recovery */ |