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Subject[PATCH 1/2] dma: pl330: support burst mode for dev-to-mem and mem-to-dev transmit
Date
This patch adds to support burst mode for dev-to-mem and mem-to-dev transmit

Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
---
drivers/dma/pl330.c | 12 +++++++-----
1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 80680ee..a070160 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -1271,10 +1271,11 @@ static inline int _ldst_devtomem(unsigned dry_run, u8 buf[],
const struct _xfer_spec *pxs, int cyc)
{
int off = 0;
+ enum pl330_cond cond = (pxs->r->cfg->brst_size == 1) ? SINGLE : BURST;

while (cyc--) {
- off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
- off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->r->peri);
+ off += _emit_WFP(dry_run, &buf[off], cond, pxs->r->peri);
+ off += _emit_LDP(dry_run, &buf[off], cond, pxs->r->peri);
off += _emit_ST(dry_run, &buf[off], ALWAYS);
off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
}
@@ -1286,11 +1287,12 @@ static inline int _ldst_memtodev(unsigned dry_run, u8 buf[],
const struct _xfer_spec *pxs, int cyc)
{
int off = 0;
+ enum pl330_cond cond = (pxs->r->cfg->brst_size == 1) ? SINGLE : BURST;

while (cyc--) {
- off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
+ off += _emit_WFP(dry_run, &buf[off], cond, pxs->r->peri);
off += _emit_LD(dry_run, &buf[off], ALWAYS);
- off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->r->peri);
+ off += _emit_STP(dry_run, &buf[off], cond, pxs->r->peri);
off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
}

@@ -2835,7 +2837,7 @@ 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;
}

/* Return the last desc in the chain */
--
1.7.5.4



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