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| author | Pandith N <pandith.n@intel.com> | 2021-08-02 11:24:53 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-08-02 12:19:52 +0530 |
| commit | f95f3b53513d4bd846169fc42705548609494cce (patch) | |
| tree | c64933994ffb99fdeba5ba9b55798a9446c6e406 | |
| parent | 32286e2793858a8491c2276b2754e9850467bb6b (diff) | |
| download | linux-stable-f95f3b53513d4bd846169fc42705548609494cce.tar.gz linux-stable-f95f3b53513d4bd846169fc42705548609494cce.tar.bz2 linux-stable-f95f3b53513d4bd846169fc42705548609494cce.zip | |
dmaengine: dw-axi-dmac: support parallel memory <--> peripheral transfers
Added support for multiple DMA_MEM_TO_DEV, DMA_DEV_TO_MEM transfers in
parallel. This is required for peripherals using DMA for transmit and
receive operations at the same time. APB slot number needs to be
programmed in channel hardware handshaking interface
Signed-off-by: Pandith N <pandith.n@intel.com>
Tested-by: Pan Kris <kris.pan@intel.com>
Link: https://lore.kernel.org/r/20210802055454.15192-3-pandith.n@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 4 | ||||
| -rw-r--r-- | drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 2 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c index c3bb2b4820a3..3edc647271b4 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -363,12 +363,16 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan, DWAXIDMAC_TT_FC_MEM_TO_PER_DST : DWAXIDMAC_TT_FC_MEM_TO_PER_DMAC) << CH_CFG_H_TT_FC_POS; + if (chan->chip->apb_regs) + reg |= (chan->id << CH_CFG_H_DST_PER_POS); break; case DMA_DEV_TO_MEM: reg |= (chan->config.device_fc ? DWAXIDMAC_TT_FC_PER_TO_MEM_SRC : DWAXIDMAC_TT_FC_PER_TO_MEM_DMAC) << CH_CFG_H_TT_FC_POS; + if (chan->chip->apb_regs) + reg |= (chan->id << CH_CFG_H_SRC_PER_POS); break; default: break; diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h index 358f553cafe9..380005afde16 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h @@ -258,6 +258,8 @@ enum { /* CH_CFG_H */ #define CH_CFG_H_PRIORITY_POS 17 +#define CH_CFG_H_DST_PER_POS 12 +#define CH_CFG_H_SRC_PER_POS 7 #define CH_CFG_H_HS_SEL_DST_POS 4 #define CH_CFG_H_HS_SEL_SRC_POS 3 enum { |