This patch adds to support burst mode for dev-to-mem and
mem-to-dev transmit.
Signed-off-by: Boojin Kim <boojin.kim@xxxxxxxxxxx>
Signed-off-by: Addy Ke <addy.ke@xxxxxxxxxxxxxx>
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
cc: Heiko Stuebner <heiko@xxxxxxxxx>
cc: Doug Anderson <dianders@xxxxxxxxxxxx>
cc: Olof Johansson <olofj@xxxxxxxxxx>
Reviewed-and-tested-by: Sonny Rao <sonnyrao@xxxxxxxxxxxx>
---
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);
}