From: Eric Long eric.long@spreadtrum.com
[ Upstream commit 97dbd6ea02beb3a7027c158e0a110b5095268d59 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/sprd-dma.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 38d4e4f07c66..f7da9ab31b7c 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -450,7 +450,7 @@ 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) { @@ -465,13 +465,19 @@ 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); } @@ -674,9 +680,6 @@ 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 */