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authorSugar Zhang <sugar.zhang@rock-chips.com>2020-06-29 16:05:42 +0200
committerVinod Koul <vkoul@kernel.org>2020-07-15 07:55:11 +0200
commit05611a93b8ffa3fe7d2eb43dd6c11e37ead5908a (patch)
treeac6b0386d07a010d669a0ba3f262b3d423a1b0e5 /drivers/dma/pl330.c
parentDocumentation/driver-api: dmaengine/provider: drop doubled word (diff)
downloadlinux-05611a93b8ffa3fe7d2eb43dd6c11e37ead5908a.tar.xz
linux-05611a93b8ffa3fe7d2eb43dd6c11e37ead5908a.zip
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>
Diffstat (limited to 'drivers/dma/pl330.c')
-rw-r--r--drivers/dma/pl330.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 6a158eef6b8a..7686292bc1db 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -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) {