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FROMGIT: scsi: ufs: ufs-mediatek: Disable reset confirm feature by UniPro

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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>
(cherry picked from commit 4918694ccd git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next)
Bug: 239946304
Signed-off-by: Bart Van Assche <bvanassche@google.com>
Change-Id: I071c730b557ca5daca39ecb8f314eb62cc21409d
This commit is contained in:
Po-Wen Kao
2022-06-23 11:50:49 +08:00
committed by Treehugger Robot
parent 84b0ffaa5a
commit b208eb5f34
1 changed files with 5 additions and 0 deletions
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5
drivers/ufs/host/ufs-mediatek.c
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@@ -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 */