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bus: mhi: core: Move to an error state on mission mode failure

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If the host receives a mission mode event and by the time it can get
to processing it, the register accesses fail implying a connectivity
error, MHI should move to an error state. This helps avoid longer wait
times from a synchronous power up perspective and accurately reflects
the MHI execution environment and power management states.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Bhaumik Bhatt 2020-11-09 12:47:27 -08:00 committed by Manivannan Sadhasivam
parent faa257075b
commit dc53d862ea
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GPG key ID: 559F11E6FE91CEF5
1 changed files with 6 additions and 2 deletions
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8
drivers/bus/mhi/core/pm.c
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@ -383,10 +383,14 @@ static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl)
write_lock_irq(&mhi_cntrl->pm_lock);
if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
write_unlock_irq(&mhi_cntrl->pm_lock);
if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee))
if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee)) {
mhi_cntrl->pm_state = MHI_PM_LD_ERR_FATAL_DETECT;
write_unlock_irq(&mhi_cntrl->pm_lock);
wake_up_all(&mhi_cntrl->state_event);
return -EIO;
}
write_unlock_irq(&mhi_cntrl->pm_lock);
wake_up_all(&mhi_cntrl->state_event);