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mhi: core: Skip RDDM download if execution env is unknown

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If mhi_get_exec_env API returns MHI_EE_MAX skip RDDM download.
API returns this value if BHI offset read failed or BHI_EXECENV
register read fails. This indicates the underlying transport is
unresponsive so there is no need to trigger RDDM using SYSERR
or request SOC reset.

Change-Id: I0cc85af84f19b425c94fe8aea987ab03af6de032
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2020-08-17 21:37:06 -07:00
commit c61705f68b
1 changed files with 7 additions and 2 deletions
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9
drivers/bus/mhi/core/mhi_boot.c
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@ -217,6 +217,9 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
* waiting for image download completion.
*/
ee = mhi_get_exec_env(mhi_cntrl);
if (ee == MHI_EE_MAX)
goto err_no_rddm;
if (ee != MHI_EE_RDDM) {
MHI_CNTRL_LOG("Trigger device into RDDM mode using SYSERR\n");
@ -265,10 +268,12 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
ee = mhi_get_exec_env(mhi_cntrl);
ret = mhi_read_reg(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS, &rx_status);
MHI_CNTRL_ERR("Did not complete RDDM transfer\n");
MHI_CNTRL_ERR("Current EE:%s\n", TO_MHI_EXEC_STR(ee));
MHI_CNTRL_ERR("RXVEC_STATUS:0x%x, ret:%d\n", rx_status, ret);
err_no_rddm:
MHI_CNTRL_ERR("Current EE:%s\n", TO_MHI_EXEC_STR(ee));
MHI_CNTRL_ERR("Did not complete RDDM transfer\n");
return -EIO;
}