diff options
Diffstat (limited to 'drivers/bus/mhi/core/main.c')
| -rw-r--r-- | drivers/bus/mhi/core/main.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 930aba666b67..ffde617f93a3 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -1430,7 +1430,7 @@ exit_unprepare_channel: } int mhi_prepare_channel(struct mhi_controller *mhi_cntrl, - struct mhi_chan *mhi_chan) + struct mhi_chan *mhi_chan, unsigned int flags) { int ret = 0; struct device *dev = &mhi_chan->mhi_dev->dev; @@ -1455,6 +1455,9 @@ int mhi_prepare_channel(struct mhi_controller *mhi_cntrl, if (ret) goto error_pm_state; + if (mhi_chan->dir == DMA_FROM_DEVICE) + mhi_chan->pre_alloc = !!(flags & MHI_CH_INBOUND_ALLOC_BUFS); + /* Pre-allocate buffer for xfer ring */ if (mhi_chan->pre_alloc) { int nr_el = get_nr_avail_ring_elements(mhi_cntrl, @@ -1610,8 +1613,7 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan) read_unlock_bh(&mhi_cntrl->pm_lock); } -/* Move channel to start state */ -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev) +static int __mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags) { int ret, dir; struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl; @@ -1622,7 +1624,7 @@ int mhi_prepare_for_transfer(struct mhi_device *mhi_dev) if (!mhi_chan) continue; - ret = mhi_prepare_channel(mhi_cntrl, mhi_chan); + ret = mhi_prepare_channel(mhi_cntrl, mhi_chan, flags); if (ret) goto error_open_chan; } @@ -1640,8 +1642,19 @@ error_open_chan: return ret; } + +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev) +{ + return __mhi_prepare_for_transfer(mhi_dev, 0); +} EXPORT_SYMBOL_GPL(mhi_prepare_for_transfer); +int mhi_prepare_for_transfer_autoqueue(struct mhi_device *mhi_dev) +{ + return __mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS); +} +EXPORT_SYMBOL_GPL(mhi_prepare_for_transfer_autoqueue); + void mhi_unprepare_from_transfer(struct mhi_device *mhi_dev) { struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl; |