From 05611a93b8ffa3fe7d2eb43dd6c11e37ead5908a Mon Sep 17 00:00:00 2001 From: Sugar Zhang Date: Mon, 29 Jun 2020 22:05:42 +0800 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/1593439555-68130-2-git-send-email-sugar.zhang@rock-chips.com Signed-off-by: Vinod Koul --- drivers/dma/pl330.c | 10 ++-------- 1 file 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) {