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dmaengine: cppi41: Prepare to add PM runtime support 

Let's just move code from cppi41_dma_issue_pending() to
push_desc_queue() as that's the only call to push_desc_queue().

We want to do this for PM runtime as we need to call push_desc_queue()
also for pending queued transfers from PM runtime resume.

No functional changes, just moves code around.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Tony Lindgren 2016-08-19 15:59:39 -07:00 committed by Vinod Koul
parent 29b4817d40
commit 670fc2a870
1 changed files with 15 additions and 15 deletions
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30
drivers/dma/cppi41.c
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@ -386,21 +386,6 @@ static void push_desc_queue(struct cppi41_channel *c)
u32 desc_phys;
u32 reg;
desc_phys = lower_32_bits(c->desc_phys);
desc_num = (desc_phys - cdd->descs_phys) / sizeof(struct cppi41_desc);
WARN_ON(cdd->chan_busy[desc_num]);
cdd->chan_busy[desc_num] = c;
reg = (sizeof(struct cppi41_desc) - 24) / 4;
reg |= desc_phys;
cppi_writel(reg, cdd->qmgr_mem + QMGR_QUEUE_D(c->q_num));
}
static void cppi41_dma_issue_pending(struct dma_chan *chan)
{
struct cppi41_channel *c = to_cpp41_chan(chan);
u32 reg;
c->residue = 0;
reg = GCR_CHAN_ENABLE;
@ -418,6 +403,21 @@ static void cppi41_dma_issue_pending(struct dma_chan *chan)
* before starting the dma engine.
*/
__iowmb();
desc_phys = lower_32_bits(c->desc_phys);
desc_num = (desc_phys - cdd->descs_phys) / sizeof(struct cppi41_desc);
WARN_ON(cdd->chan_busy[desc_num]);
cdd->chan_busy[desc_num] = c;
reg = (sizeof(struct cppi41_desc) - 24) / 4;
reg |= desc_phys;
cppi_writel(reg, cdd->qmgr_mem + QMGR_QUEUE_D(c->q_num));
}
static void cppi41_dma_issue_pending(struct dma_chan *chan)
{
struct cppi41_channel *c = to_cpp41_chan(chan);
push_desc_queue(c);
}