This is a note to let you know that I've just added the patch titled
spi: mt65xx: Add dma max segment size declaration
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-mt65xx-add-dma-max-segment-size-declaration.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f94f99e49ab4259af47e84ec9f348bff4003c7fd
Author: zhichao.liu <zhichao.liu@xxxxxxxxxxxx>
Date: Tue Sep 27 16:32:48 2022 +0800
spi: mt65xx: Add dma max segment size declaration
[ 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>
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)
