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dmaengine: edma: Read channel mapping support only once from HW

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Instead of directly reading it from CCCFG register take the information out
once when we set up the configuration from the HW.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Ujfalusi 2015-10-14 14:43:04 +03:00 committed by Vinod Koul
parent e4402a129f
commit 4ab54f696d
1 changed files with 6 additions and 2 deletions
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8
drivers/dma/edma.c
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@ -223,6 +223,7 @@ struct edma_cc {
unsigned num_region;
unsigned num_slots;
unsigned num_tc;
bool chmap_exist;
enum dma_event_q default_queue;
bool unused_chan_list_done;
@ -1930,11 +1931,14 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
value = GET_NUM_EVQUE(cccfg);
ecc->num_tc = value + 1;
ecc->chmap_exist = (cccfg & CHMAP_EXIST) ? true : false;
dev_dbg(dev, "eDMA3 CC HW configuration (cccfg: 0x%08x):\n", cccfg);
dev_dbg(dev, "num_region: %u\n", ecc->num_region);
dev_dbg(dev, "num_channels: %u\n", ecc->num_channels);
dev_dbg(dev, "num_slots: %u\n", ecc->num_slots);
dev_dbg(dev, "num_tc: %u\n", ecc->num_tc);
dev_dbg(dev, "chmap_exist: %s\n", ecc->chmap_exist ? "yes" : "no");
/* Nothing need to be done if queue priority is provided */
if (pdata->queue_priority_mapping)
@ -2223,7 +2227,7 @@ static int edma_probe(struct platform_device *pdev)
queue_priority_mapping[i][1]);
/* Map the channel to param entry if channel mapping logic exist */
if (edma_read(ecc, EDMA_CCCFG) & CHMAP_EXIST)
if (ecc->chmap_exist)
edma_direct_dmach_to_param_mapping(ecc);
for (i = 0; i < ecc->num_region; i++) {
@ -2293,7 +2297,7 @@ static int edma_pm_resume(struct device *dev)
queue_priority_mapping[i][1]);
/* Map the channel to param entry if channel mapping logic */
if (edma_read(ecc, EDMA_CCCFG) & CHMAP_EXIST)
if (ecc->chmap_exist)
edma_direct_dmach_to_param_mapping(ecc);
for (i = 0; i < ecc->num_channels; i++) {