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bus: mhi: core: Improve mhi_sync_power_up handling for SYS_ERR state

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[ Upstream commit aa1a0e93ed ]

Allow mhi_sync_power_up to handle SYS_ERR during power-up, reboot,
or recovery. This is to avoid premature exit when MHI_PM_IN_ERROR_STATE is
observed during above mentioned system states.

To achieve this, treat SYS_ERR as a valid state and let its handler process
the error and queue the next transition to Mission Mode instead of aborting
early.

Signed-off-by: Vivek Pernamitta <quic_vpernami@quicinc.com>
[mani: reworded description]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Link: https://patch.msgid.link/20250912-uevent_vdev_next-20250911-v4-5-fa2f6ccd301b@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vivek Pernamitta
2025-09-12 18:18:09 +05:30
committed by Greg Kroah-Hartman
parent d74e67fd40
commit 27fef5d593
2 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/bus/mhi/host/internal.h
View File

@@ -170,6 +170,8 @@ enum mhi_pm_state {
MHI_PM_IN_ERROR_STATE(pm_state))
#define MHI_PM_IN_SUSPEND_STATE(pm_state) (pm_state & \
(MHI_PM_M3_ENTER | MHI_PM_M3))
#define MHI_PM_FATAL_ERROR(pm_state) ((pm_state == MHI_PM_FW_DL_ERR) || \
(pm_state >= MHI_PM_SYS_ERR_FAIL))
#define NR_OF_CMD_RINGS 1
#define CMD_EL_PER_RING 128

2
drivers/bus/mhi/host/pm.c
View File

@@ -1279,7 +1279,7 @@ int mhi_sync_power_up(struct mhi_controller *mhi_cntrl)
mhi_cntrl->ready_timeout_ms : mhi_cntrl->timeout_ms;
wait_event_timeout(mhi_cntrl->state_event,
MHI_IN_MISSION_MODE(mhi_cntrl->ee) ||
MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
MHI_PM_FATAL_ERROR(mhi_cntrl->pm_state),
msecs_to_jiffies(timeout_ms));
ret = (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -ETIMEDOUT;