* [PATCH] spi: mt65xx: Add dma max segment size declaration
@ 2022-09-27 8:32 Zhichao Liu
0 siblings, 0 replies; only message in thread
From: Zhichao Liu @ 2022-09-27 8:32 UTC (permalink / raw)
To: Mark Brown, linux-spi; +Cc: zhichao.liu
From: "zhichao.liu" <zhichao.liu@mediatek.com>
Add spi dma max segment size declaration according to spi
hardware capability, instead of 64KB by system default
setting, to improve bus bandwidth for mass data transmission.
Signed-off-by: zhichao.liu <zhichao.liu@mediatek.com>
---
drivers/spi/spi-mt65xx.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 0a3b9f7eed30..11aeae7fe7fc 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1184,6 +1184,11 @@ static int mtk_spi_probe(struct platform_device *pdev)
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
+ if (mdata->dev_comp->ipm_design)
+ dma_set_max_seg_size(dev, SZ_16M);
+ else
+ dma_set_max_seg_size(dev, SZ_256K);
+
ret = devm_request_irq(dev, irq, mtk_spi_interrupt,
IRQF_TRIGGER_NONE, dev_name(dev), master);
if (ret)
--
2.18.0
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