dmaengine: pl330: fix to support the burst mode
This patch fixes the burst mode that will break DMA uart on SoCFPGA.
In some cases, some SoCS didn't support the multi-burst
even if the devices who use the pl330 claim support the maxburst.
Fixes: commit 848e977
"dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit"
Reported-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Tested-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 1b0453b..372b435 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -1161,7 +1161,7 @@
if (pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP)
cond = BURST;
else
- cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;
+ cond = SINGLE;
while (cyc--) {
off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
@@ -1186,8 +1186,7 @@
if (pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP)
cond = BURST;
else
- cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;
-
+ cond = SINGLE;
while (cyc--) {
off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
@@ -2598,7 +2597,7 @@
desc->rqtype = direction;
desc->rqcfg.brst_size = pch->burst_sz;
- desc->rqcfg.brst_len = pch->burst_len;
+ desc->rqcfg.brst_len = 1;
desc->bytes_requested = period_len;
fill_px(&desc->px, dst, src, period_len);
@@ -2743,7 +2742,7 @@
}
desc->rqcfg.brst_size = pch->burst_sz;
- desc->rqcfg.brst_len = pch->burst_len;
+ desc->rqcfg.brst_len = 1;
desc->rqtype = direction;
desc->bytes_requested = sg_dma_len(sg);
}