diff options
| author | Sinan Kaya <okaya@codeaurora.org> | 2016-05-01 07:25:26 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-05-14 09:24:45 +0300 |
| commit | d1615ca2e085222025118793b7b4af2cf4867b6e (patch) | |
| tree | 5936945db6bdc897ca49552f79724929240a8b59 /drivers/dma/qcom/hidma.c | |
| parent | 5ad3f29f6a712c3a37dbda4fba3b6969857d39d9 (diff) | |
| download | linux-d1615ca2e085222025118793b7b4af2cf4867b6e.tar.xz | |
dmaengine: qcom_hidma: implement lower level hardware interface
This patch implements the hardware hooks for the HIDMA channel driver.
The main functions of interest are:
- hidma_ll_init
- hidma_ll_request
- hidma_ll_queue_request
- hidma_ll_hw_start
OS layer calls the hidma_ll_init function during probe to set up the
hardware. At this moment, the number of supported descriptors are also
given. On each request, a descriptor is allocated from the free pool and
filled in with the transfer parameters. Multiple requests can be queued
into the hardware via the OS interface. When client is ready for requests
to be executed, start method is called.
Completions are delivered via callbacks via tasklet.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/qcom/hidma.c')
| -rw-r--r-- | drivers/dma/qcom/hidma.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c index cccc78efbca9..af5e542f453b 100644 --- a/drivers/dma/qcom/hidma.c +++ b/drivers/dma/qcom/hidma.c @@ -404,7 +404,7 @@ static int hidma_terminate_channel(struct dma_chan *chan) spin_unlock_irqrestore(&mchan->lock, irqflags); /* this suspends the existing transfer */ - rc = hidma_ll_pause(dmadev->lldev); + rc = hidma_ll_disable(dmadev->lldev); if (rc) { dev_err(dmadev->ddev.dev, "channel did not pause\n"); goto out; @@ -427,7 +427,7 @@ static int hidma_terminate_channel(struct dma_chan *chan) list_move(&mdesc->node, &mchan->free); } - rc = hidma_ll_resume(dmadev->lldev); + rc = hidma_ll_enable(dmadev->lldev); out: pm_runtime_mark_last_busy(dmadev->ddev.dev); pm_runtime_put_autosuspend(dmadev->ddev.dev); @@ -488,7 +488,7 @@ static int hidma_pause(struct dma_chan *chan) dmadev = to_hidma_dev(mchan->chan.device); if (!mchan->paused) { pm_runtime_get_sync(dmadev->ddev.dev); - if (hidma_ll_pause(dmadev->lldev)) + if (hidma_ll_disable(dmadev->lldev)) dev_warn(dmadev->ddev.dev, "channel did not stop\n"); mchan->paused = true; pm_runtime_mark_last_busy(dmadev->ddev.dev); @@ -507,7 +507,7 @@ static int hidma_resume(struct dma_chan *chan) dmadev = to_hidma_dev(mchan->chan.device); if (mchan->paused) { pm_runtime_get_sync(dmadev->ddev.dev); - rc = hidma_ll_resume(dmadev->lldev); + rc = hidma_ll_enable(dmadev->lldev); if (!rc) mchan->paused = false; else |