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dmaengine: pl330: Remove the burst limit for quirk 'NO-FLUSHP' 

There is no reason to limit the performance on the 'NO-FLUSHP' SoCs,
because 'FLUSHP' instruction is broken on these platforms, so remove
the limit to improve the efficiency.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Link: https://lore.kernel.org/r/1593439555-68130-2-git-send-email-sugar.zhang@rock-chips.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sugar Zhang 2020-06-29 22:05:42 +08:00 committed by Vinod Koul
parent 3621d3e57d
commit 05611a93b8
1 changed files with 2 additions and 8 deletions
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10
drivers/dma/pl330.c
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@ -1183,9 +1183,6 @@ static inline int _ldst_peripheral(struct pl330_dmac *pl330,
{
int off = 0;
if (pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP)
cond = BURST;
/*
* do FLUSHP at beginning to clear any stale dma requests before the
* first WFP.
@ -2221,9 +2218,7 @@ static bool pl330_prep_slave_fifo(struct dma_pl330_chan *pch,
static int fixup_burst_len(int max_burst_len, int quirks)
{
if (quirks & PL330_QUIRK_BROKEN_NO_FLUSHP)
return 1;
else if (max_burst_len > PL330_MAX_BURST)
if (max_burst_len > PL330_MAX_BURST)
return PL330_MAX_BURST;
else if (max_burst_len < 1)
return 1;
@ -3128,8 +3123,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
pd->dst_addr_widths = PL330_DMA_BUSWIDTHS;
pd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
pd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
pd->max_burst = ((pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP) ?
1 : PL330_MAX_BURST);
pd->max_burst = PL330_MAX_BURST;
ret = dma_async_device_register(pd);
if (ret) {