usb: xhci-mtk: fix a short packet issue of gen1 isoc-in transfer

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[ Upstream commit 017dbfc05c ]

For Gen1 isoc-in transfer, host still send out unexpected ACK after device
finish the burst with a short packet, this will cause an exception on the
connected device, such as, a usb 4k camera.
It can be fixed by setting rxfifo depth less than 4k bytes, prefer to use
3k here, the side-effect is that may cause performance drop about 10%,
including bulk transfer.

Fixes: 926d60ae64 ("usb: xhci-mtk: modify the SOF/ITP interval for mt8195")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20240104061640.7335-2-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Chunfeng Yun 2024-01-04 14:16:39 +08:00 • committed by Greg Kroah-Hartman

parent 77ab09b92f

commit 48d7114dce

2 changed files with 40 additions and 2 deletions

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40

drivers/usb/host/xhci-mtk.c

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2

drivers/usb/host/xhci-mtk.h

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