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MLK-23411 ARM64: dts: imx8mq-evk: disable u1 and u2 entries for typec port 

Commit 729dcffd1e ("usb: dwc3: gadget: Add support for disabling
U1 and U2 entries") give detail explaination for user case of
disable u1 and u2 in gadget mode:

"Usecase 1:
 When combining dwc3 with an redriver for a USB Type-C device
 solution, itsometimes have problems with leaving U1/U2 for
 certain hosts, resulting in link training errors and reconnects.
 For this U1/U2 state entries may be avoided."

on imx8mq-evk board, we have typec and redriver used and android
reported unstable issue when use some host PC for adb, so to have
a better performance, we disable u1 and u2 entries.

Reported-by: Richard Liu <xuegang.liu@nxp.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Li Jun 2020-03-01 20:26:06 +08:00
parent 2a3bb30476
commit b84f6b9289
1 changed files with 2 additions and 0 deletions
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2
arch/arm64/boot/dts/freescale/imx8mq-evk.dts
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@ -696,6 +696,8 @@
srp-disable;
adp-disable;
usb-role-switch;
snps,dis-u1-entry-quirk;
snps,dis-u2-entry-quirk;
status = "okay";
port {