lkml.org 
[lkml]   [2022]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v1 5/7] scsi: ufs-mediatek: Disable reset confirm feature by UniPro
    Date
    From: Po-Wen Kao <powen.kao@mediatek.com>

    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.

    Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
    Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
    Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
    ---
    drivers/ufs/host/ufs-mediatek.c | 5 +++++
    1 file changed, 5 insertions(+)

    diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
    index 8184e871ff8e..348966dbad78 100755
    --- 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 */
    --
    2.18.0
    \
     
     \ /
      Last update: 2022-06-22 09:38    [W:3.074 / U:0.292 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site