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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>
hifive-unleashed-5.1
Eric Long 2018-11-06 13:01:35 +08:00 committed by Vinod Koul
parent 0e5d7b1eb6
commit 97dbd6ea02
1 changed files with 14 additions and 11 deletions
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25
drivers/dma/sprd-dma.c
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@ -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 */