diff options
| author | Eric Long <eric.long@spreadtrum.com> | 2018-11-06 13:01:35 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2018-12-05 14:27:12 +0530 |
| commit | 97dbd6ea02beb3a7027c158e0a110b5095268d59 (patch) | |
| tree | ce43fd76d98932d8cb7c7ac1ec993306b25b6237 /drivers/dma | |
| parent | 0e5d7b1eb6fc06d2f9287519e238fa13efb69cee (diff) | |
| download | linux-97dbd6ea02beb3a7027c158e0a110b5095268d59.tar.gz | |
dmaengine: sprd: Support DMA link-list cyclic callback
The Spreadtrum DMA link-list mode is always one cyclic transfer, so we should clear the SPRD_DMA_LLIST_END flag for the link-list configuration. Moreover add cyclic callback support for the cyclic transfer. Signed-off-by: Eric Long <eric.long@spreadtrum.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/sprd-dma.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 1b39661cd17b..cefe42fb7100 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -463,7 +463,7 @@ static irqreturn_t dma_irq_handle(int irq, void *dev_id) struct sprd_dma_desc *sdesc; enum sprd_dma_req_mode req_type; enum sprd_dma_int_type int_type; - bool trans_done = false; + bool trans_done = false, cyclic = false; u32 i; while (irq_status) { @@ -478,13 +478,19 @@ static irqreturn_t dma_irq_handle(int irq, void *dev_id) sdesc = schan->cur_desc; - /* Check if the dma request descriptor is done. */ - trans_done = sprd_dma_check_trans_done(sdesc, int_type, - req_type); - if (trans_done == true) { - vchan_cookie_complete(&sdesc->vd); - schan->cur_desc = NULL; - sprd_dma_start(schan); + /* cyclic mode schedule callback */ + cyclic = schan->linklist.phy_addr ? true : false; + if (cyclic == true) { + vchan_cyclic_callback(&sdesc->vd); + } else { + /* Check if the dma request descriptor is done. */ + trans_done = sprd_dma_check_trans_done(sdesc, int_type, + req_type); + if (trans_done == true) { + vchan_cookie_complete(&sdesc->vd); + schan->cur_desc = NULL; + sprd_dma_start(schan); + } } spin_unlock(&schan->vc.lock); } @@ -692,9 +698,6 @@ static int sprd_dma_fill_desc(struct dma_chan *chan, /* link-list configuration */ if (schan->linklist.phy_addr) { - if (sg_index == sglen - 1) - hw->frg_len |= SPRD_DMA_LLIST_END; - hw->cfg |= SPRD_DMA_LINKLIST_EN; /* link-list index */ |