From mboxrd@z Thu Jan 1 00:00:00 1970 From: heiko@sntech.de (Heiko Stuebner) Date: Sat, 17 Feb 2018 01:09:52 +0100 Subject: [PATCH v3 4/6] phy: rockchip-typec: force to USB2 if DP at 4 lanes mode In-Reply-To: <20180216120956.19034-4-enric.balletbo@collabora.com> References: <20180216120956.19034-1-enric.balletbo@collabora.com> <20180216120956.19034-4-enric.balletbo@collabora.com> Message-ID: <4816286.2JUx8CKC3E@phil> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Am Freitag, 16. Februar 2018, 13:09:54 CET schrieb Enric Balletbo i Serra: > From: Chris Zhong > > The usb3tousb2_en BIT will be clear to 0 in probe(), it make USB > controller work at USB3 mode, and if the USB phy is turned on with DP > only mode(4 lanes DP), the rockchip_usb3_phy_power_on() will return > directly, so usb3_host_disable and usb3_host_port these 2 BIT will keep > a same value as coreboot. In coreboot, these 3 BITs are set as USB2 > mode, but now one of the bits is changed to USB3, it make USB controller > work at a unknown status. > > These 3 BITs should be changed to USB2, if the Type-C works at 4 lanes > mode, and then switch it back to USB3 mode, when USB disconnect. > > Signed-off-by: Chris Zhong > Signed-off-by: Enric Balletbo i Serra Reviewed-by: Heiko Stuebner