Commit 93a7d32e authored by Pandith N's avatar Pandith N Committed by Vinod Koul
Browse files

dmaengine: dw-axi-dmac: Hardware handshake configuration 



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: default avatarPandith N <pandith.n@intel.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211001140812.24977-3-pandith.n@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 82435166

drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c

+4 −0
Original line number Diff line number Diff line
@@ -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;