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scsi: ufs: rockchip: Reset controller on PRE_CHANGE of hce enable notify

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This fixes the dme-reset failed when doing recovery. Because device
reset is not enough, we could occasionally see the error below:

ufshcd-rockchip 2a2d0000.ufs: uic cmd 0x14 with arg3 0x0 completion timeout
ufshcd-rockchip 2a2d0000.ufs: dme-reset: error code -110
ufshcd-rockchip 2a2d0000.ufs: DME_RESET failed
ufshcd-rockchip 2a2d0000.ufs: ufshcd_host_reset_and_restore: Host init failed -110

Fix this by resetting the controller on PRE_CHANGE stage of hce enable
notify.

Fixes: d3cbe455d6 ("scsi: ufs: rockchip: Initial support for UFS")
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Link: https://patch.msgid.link/1763009575-237552-1-git-send-email-shawn.lin@rock-chips.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shawn Lin
2025-11-13 12:52:55 +08:00
committed by Martin K. Petersen
parent 31e6e7e54b
commit b0ee72db91
1 changed files with 13 additions and 6 deletions
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19
drivers/ufs/host/ufs-rockchip.c
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@@ -20,9 +20,17 @@
#include "ufshcd-pltfrm.h"
#include "ufs-rockchip.h"
static void ufs_rockchip_controller_reset(struct ufs_rockchip_host *host)
{
reset_control_assert(host->rst);
udelay(1);
reset_control_deassert(host->rst);
}
static int ufs_rockchip_hce_enable_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
struct ufs_rockchip_host *host = ufshcd_get_variant(hba);
int err = 0;
if (status == POST_CHANGE) {
@@ -37,6 +45,9 @@ static int ufs_rockchip_hce_enable_notify(struct ufs_hba *hba,
return ufshcd_vops_phy_initialization(hba);
}
/* PRE_CHANGE */
ufs_rockchip_controller_reset(host);
return 0;
}
@@ -156,9 +167,7 @@ static int ufs_rockchip_common_init(struct ufs_hba *hba)
return dev_err_probe(dev, PTR_ERR(host->rst),
"failed to get reset control\n");
reset_control_assert(host->rst);
udelay(1);
reset_control_deassert(host->rst);
ufs_rockchip_controller_reset(host);
host->ref_out_clk = devm_clk_get_enabled(dev, "ref_out");
if (IS_ERR(host->ref_out_clk))
@@ -282,9 +291,7 @@ static int ufs_rockchip_runtime_resume(struct device *dev)
return err;
}
reset_control_assert(host->rst);
udelay(1);
reset_control_deassert(host->rst);
ufs_rockchip_controller_reset(host);
return ufshcd_runtime_resume(dev);
}