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Commit 848e9776 authored by Boojin Kim's avatar Boojin Kim Committed by Vinod Koul
Browse files

dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit 



This patch adds to support burst mode for dev-to-mem and
mem-to-dev transmit.

Signed-off-by: default avatarBoojin Kim <boojin.kim@samsung.com>
Signed-off-by: default avatarAddy Ke <addy.ke@rock-chips.com>
Signed-off-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
cc: Heiko Stuebner <heiko@sntech.de>
cc: Doug Anderson <dianders@chromium.org>
cc: Olof Johansson <olof@lixom.net>

Reviewed-by: default avatarSonny Rao <sonnyrao@chromium.org>
Signed-off-by: default avatarCaesar Wang <wxt@rock-chips.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 92e963f5

drivers/dma/pl330.c

+13 −7
Original line number Diff line number Diff line
@@ -1141,10 +1141,13 @@ static inline int _ldst_devtomem(unsigned dry_run, u8 buf[], 
		const struct _xfer_spec *pxs, int cyc)

{

	int off = 0;

	enum pl330_cond cond;



	cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;



	while (cyc--) {

		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);

		off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->desc->peri);

		off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);

		off += _emit_LDP(dry_run, &buf[off], cond, pxs->desc->peri);

		off += _emit_ST(dry_run, &buf[off], ALWAYS);

		off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);

	}
@@ -1156,11 +1159,14 @@ static inline int _ldst_memtodev(unsigned dry_run, u8 buf[], 
		const struct _xfer_spec *pxs, int cyc)

{

	int off = 0;

	enum pl330_cond cond;



	cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;



	while (cyc--) {

		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);

		off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);

		off += _emit_LD(dry_run, &buf[off], ALWAYS);

		off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->desc->peri);

		off += _emit_STP(dry_run, &buf[off], cond, pxs->desc->peri);

		off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);

	}
@@ -1199,7 +1205,7 @@ static inline int _loop(unsigned dry_run, u8 buf[], 
	struct _arg_LPEND lpend;



	if (*bursts == 1)

		return _bursts(dry_run, buf, pxs, 1);

		return _bursts(pl330, dry_run, buf, pxs, 1);



	/* Max iterations possible in DMALP is 256 */

	if (*bursts >= 256*256) {
@@ -2560,7 +2566,7 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic( 


		desc->rqtype = direction;

		desc->rqcfg.brst_size = pch->burst_sz;

		desc->rqcfg.brst_len = 1;

		desc->rqcfg.brst_len = pch->burst_len;

		desc->bytes_requested = period_len;

		fill_px(&desc->px, dst, src, period_len);
@@ -2705,7 +2711,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, 
		}



		desc->rqcfg.brst_size = pch->burst_sz;

		desc->rqcfg.brst_len = 1;

		desc->rqcfg.brst_len = pch->burst_len;

		desc->rqtype = direction;

		desc->bytes_requested = sg_dma_len(sg);

	}