From: Boojin Kim <redacted>

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

Signed-off-by: Boojin Kim <redacted>
Signed-off-by: Addy Ke <redacted>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
cc: Heiko Stuebner <heiko@sntech.de>
cc: Doug Anderson <dianders@chromium.org>
cc: Olof Johansson <redacted>

---

Changes in v2:
- amend the author
- amend Olof's mail address

Changes in v1:
- rename broken-no-flushp to "arm,pl330-broken-no-flushp" suggested
  by Krzysztof.
- add From original author.
- remove Sunny's tag

 drivers/dma/pl330.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index ecab4ea0..0d544d2 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c

@@ -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);
        }

@@ -2557,7 +2563,7 @@ 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);

@@ -2702,7 +2708,7 @@ 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);
        }
--

2.3.7