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dmaengine: dw-axi-dmac: Hardware handshake configuration

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Added hardware handshake selection in channel config,
for mem2per and per2mem case.
The peripheral specific handshake interface needs to be
programmed in src_per, dst_per bits of CHx_CFG register.

Signed-off-by: Pandith N <pandith.n@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211001140812.24977-3-pandith.n@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pandith N 2021-10-01 19:38:11 +05:30 committed by Vinod Koul
parent 824351668a
commit 93a7d32e9f
1 changed files with 4 additions and 0 deletions
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4
drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
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@ -396,6 +396,8 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
DWAXIDMAC_TT_FC_MEM_TO_PER_DMAC;
if (chan->chip->apb_regs)
config.dst_per = chan->id;
else
config.dst_per = chan->hw_handshake_num;
break;
case DMA_DEV_TO_MEM:
config.tt_fc = chan->config.device_fc ?
@ -403,6 +405,8 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
DWAXIDMAC_TT_FC_PER_TO_MEM_DMAC;
if (chan->chip->apb_regs)
config.src_per = chan->id;
else
config.src_per = chan->hw_handshake_num;
break;
default:
break;