From dc18413adbf188ffdfb0706023249e7c03b29545 Mon Sep 17 00:00:00 2001 From: Jagan Teki Date: Tue, 26 May 2020 11:33:48 +0800 Subject: usb: dwc3: Add disable u2mac linestate check quirk This patch adds a quirk to disable USB 2.0 MAC linestate check during HS transmit. Refer the dwc3 databook, we can use it for some special platforms if the linestate not reflect the expected line state(J) during transmission. When use this quirk, the controller implements a fixed 40-bit TxEndDelay after the packet is given on UTMI and ignores the linestate during the transmit of a token (during token-to-token and token-to-data IPGAP). On some rockchip platforms (e.g. rk3399), it requires to disable the u2mac linestate check to decrease the SSPLIT token to SETUP token inter-packet delay from 566ns to 466ns, and fix the issue that FS/LS devices not recognized if inserted through USB 3.0 HUB. Reference from below Linux commit, commit <65db7a0c9816> ("usb: dwc3: add disable u2mac linestate check quirk") Cc: Marek Vasut Signed-off-by: Jagan Teki Reviewed-by: Kever Yang --- include/dwc3-uboot.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/dwc3-uboot.h') diff --git a/include/dwc3-uboot.h b/include/dwc3-uboot.h index 193d225d31..e08530ec4e 100644 --- a/include/dwc3-uboot.h +++ b/include/dwc3-uboot.h @@ -34,6 +34,7 @@ struct dwc3_device { unsigned dis_u3_susphy_quirk; unsigned dis_u2_susphy_quirk; unsigned dis_del_phy_power_chg_quirk; + unsigned dis_tx_ipgap_linecheck_quirk; unsigned dis_enblslpm_quirk; unsigned dis_u2_freeclk_exists_quirk; unsigned tx_de_emphasis_quirk; -- cgit v1.2.3