From: zhichao.liu <zhichao.liu@xxxxxxxxxxxx> [ Upstream commit 309e98548c2b144512d0a212f2d786ae9694f5e4 ] 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@xxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220927083248.25404-1-zhichao.liu@xxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Stable-dep-of: c6f7874687f7 ("spi: mediatek: Enable irq when pdata is ready") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 a7cc96aeb590..d6aff909fc36 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -1187,6 +1187,11 @@ 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) -- 2.35.1
