From: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx> Improve error message to be more descriptive if a failure occurs with an invalid power up execution environment. Additionally, add a debug log to print the execution environment and MHI state before a power up is attempted to confirm if the device is in an expected state. This helps clarify reasons for power up failures such as the device being found in a PBL or Emergency Download Mode execution environment and the host expected a full power up with Pass-Through and no image loading involved. Signed-off-by: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx> Reviewed-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx> Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Link: https://lore.kernel.org/r/1620072038-36160-1-git-send-email-bbhatt@xxxxxxxxxxxxxx Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> --- drivers/bus/mhi/core/pm.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index ff7cdc8653ef..fb99e3727155 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -1069,12 +1069,16 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl) /* Confirm that the device is in valid exec env */ if (!MHI_IN_PBL(current_ee) && current_ee != MHI_EE_AMSS) { - dev_err(dev, "Not a valid EE for power on\n"); + dev_err(dev, "%s is not a valid EE for power on\n", + TO_MHI_EXEC_STR(current_ee)); ret = -EIO; goto error_async_power_up; } state = mhi_get_mhi_state(mhi_cntrl); + dev_dbg(dev, "Attempting power on with EE: %s, state: %s\n", + TO_MHI_EXEC_STR(current_ee), TO_MHI_STATE_STR(state)); + if (state == MHI_STATE_SYS_ERR) { mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET); ret = wait_event_timeout(mhi_cntrl->state_event, -- 2.25.1
