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authorChunfeng Yun <chunfeng.yun@mediatek.com>2018-04-24 10:52:48 +0800
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-05-15 10:14:59 +0300
commit11254eb2def5e1556dbe97da58af3e76a0d5e8d7 (patch)
treef38955b038f13406940e90b30e8904f0e2b1c1e8 /drivers/dma/ep93xx_dma.c
parent00505adef8a8f8fbacd206fe0a4ef59b074c53e4 (diff)
usb: mtu3: fix an unrecognized issue when connected with PC
When boot on the platform with the USB cable connected to Win7, the Win7 will pop up an error dialog: "USB Device not recognized", but finally the Win7 can enumerate it successfully. The root cause is as the following: When the xHCI driver set PORT_POWER of the OTG port, and if both IDPIN and VBUS_VALID are high at the same time, the MTU3 controller will set SESSION and pull up DP, so the Win7 can detect existence of USB device, but if the mtu3 driver can't switch to device mode during the debounce time, the Win7 can not enumerate it. Here to fix it by removing the 1s delayed EXTCON register to speed up mode switch. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/dma/ep93xx_dma.c')
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