Resolve USB 3.0 gadget failure for QM and QXPB0 in super speed mode with
single IN and OUT endpoints, like mass storage devices, due to incorrect
ACTUAL_MEM_SIZE in ep_cap2 (32k instead of actual 18k). Implement dt
property cdns,on-chip-buff-size to override ep_cap2 and set it to 18k for
imx8QM and imx8QXP chips. No adverse effects for 8QXP C0.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: dce49449e04f ("usb: cdns3: allocate TX FIFO size according to composite EP number")
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
Change from v2 to v3
-cc stable
change from v1 to v2
- fixes warning from check-patch
- update dt-binding doc
arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi b/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi
index b32c2e199c16..030c273c8be4 100644
--- a/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi
@@ -171,6 +171,7 @@ usbotg3_cdns3: usb@5b120000 {
interrupt-names = "host", "peripheral", "otg", "wakeup";
phys = <&usb3_phy>;
phy-names = "cdns3,usb3-phy";
+ cdns,on-chip-buff-size = /bits/ 16 <18>;
status = "disabled";
};
};
--
2.34.1
