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Merge "msm: mhi_dev: Poll for ipa_dma_disable during MHI suspend"

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qctecmdr 2021-06-23 03:51:21 -07:00 • committed by Gerrit - the friendly Code Review server
commit cff2da1a99
1 changed files with 21 additions and 5 deletions
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26
drivers/platform/msm/mhi_dev/mhi_sm.c
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@ -22,7 +22,10 @@
#define MHI_SM_FUNC_ENTRY() MHI_SM_DBG("ENTRY\n")
#define MHI_SM_FUNC_EXIT() MHI_SM_DBG("EXIT\n")
#define PCIE_EP_TIMER_US 500000000
#define PCIE_EP_TIMER_US 500000000
#define MHI_IPA_DISABLE_DELAY_MS 10
#define MHI_IPA_DISABLE_COUNTER 20
static inline const char *mhi_sm_dev_event_str(enum mhi_dev_event state)
{
@ -591,7 +594,7 @@ static int mhi_sm_prepare_suspend(enum mhi_dev_state new_state)
{
enum mhi_dev_state old_state;
struct ep_pcie_inactivity inact_param;
int res = 0, rc;
int res = 0, rc, wait_timeout = 0;
MHI_SM_DBG("Switching event:%d\n", new_state);
@ -668,11 +671,24 @@ static int mhi_sm_prepare_suspend(enum mhi_dev_state new_state)
(new_state == MHI_DEV_M3_STATE))) {
if (mhi_sm_ctx->mhi_dev->use_ipa) {
MHI_SM_DBG("Disable IPA with ipa_dma_disable()\n");
res = ipa_dma_disable();
if (res) {
MHI_SM_ERR("IPA disable failed\n");
while (wait_timeout < MHI_IPA_DISABLE_COUNTER) {
/* wait for the disable to finish */
res = ipa_dma_disable();
if (!res)
break;
MHI_SM_ERR
("IPA disable fail cnt:%d\n",
wait_timeout);
msleep(MHI_IPA_DISABLE_DELAY_MS);
wait_timeout++;
}
if (wait_timeout >= MHI_IPA_DISABLE_COUNTER) {
MHI_SM_ERR
("Fail to disable IPA for M3\n");
goto exit;
}
MHI_SM_ERR("IPA DMA successfully disabled\n");
}
}