| Message ID | 20250331-mtk-genio-510-700-fix-bt-detection-v1-1-34ea2cf137f3@collabora.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64: dts: mediatek: mt8390-genio-common: Force ssusb2 dual role mode to host | expand |
Il 31/03/25 11:25, Louis-Alexis Eyraud ha scritto: > On the Mediatek Genio 510-EVK and 700-EVK boards, ssusb2 controller is > one but has two ports: one is routed to the M.2 slot, the other is on > the RPi header who does support full OTG. > Since Mediatek Genio 700-EVK USB support was added, dual role mode > property is set to otg for ssusb2. This config prevents the M.2 > Wifi/Bluetooth module, present on those boards and exposing Bluetooth > as an USB device to be properly detected at startup, so configure for > the ssusb2 dr_mode property as host instead. > > Fixes: 1afaeca17238 ("arm64: dts: mediatek: mt8390-genio-700: Add USB, TypeC Controller, MUX") > Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > --- > I've tested this patch on Mediatek Genio 510-EVK board with a kernel > based on linux-next (tag: next-20250331). > --- > arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi > index 60139e6dffd8e0e326690d922f3360d829ed026b..3a9d429f0f14b501ae41551dfe7272f242345138 100644 > --- a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi > +++ b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi > @@ -1199,7 +1199,13 @@ xhci_ss_ep: endpoint { > }; > > &ssusb2 { > - dr_mode = "otg"; > + /* > + * the ssusb2 controller is one but we got two ports : one is routed > + * to the M.2 slot, the other is on the RPi header who does support > + * full OTG but we keep it disabled otherwise the BT on the M.2 slot > + * USB line goes obviously dead if switching to gadget mode. > + */ > + dr_mode = "host"; > maximum-speed = "high-speed"; > usb-role-switch; > vusb33-supply = <&mt6359_vusb_ldo_reg>; > > --- > base-commit: 1c4df70331c0dc7f82f724166575c16931ec66b3 > change-id: 20250328-mtk-genio-510-700-fix-bt-detection-2711cbcbb2e4 > > Best regards,
diff --git a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi index 60139e6dffd8e0e326690d922f3360d829ed026b..3a9d429f0f14b501ae41551dfe7272f242345138 100644 --- a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi @@ -1199,7 +1199,13 @@ xhci_ss_ep: endpoint { }; &ssusb2 { - dr_mode = "otg"; + /* + * the ssusb2 controller is one but we got two ports : one is routed + * to the M.2 slot, the other is on the RPi header who does support + * full OTG but we keep it disabled otherwise the BT on the M.2 slot + * USB line goes obviously dead if switching to gadget mode. + */ + dr_mode = "host"; maximum-speed = "high-speed"; usb-role-switch; vusb33-supply = <&mt6359_vusb_ldo_reg>;
On the Mediatek Genio 510-EVK and 700-EVK boards, ssusb2 controller is one but has two ports: one is routed to the M.2 slot, the other is on the RPi header who does support full OTG. Since Mediatek Genio 700-EVK USB support was added, dual role mode property is set to otg for ssusb2. This config prevents the M.2 Wifi/Bluetooth module, present on those boards and exposing Bluetooth as an USB device to be properly detected at startup, so configure for the ssusb2 dr_mode property as host instead. Fixes: 1afaeca17238 ("arm64: dts: mediatek: mt8390-genio-700: Add USB, TypeC Controller, MUX") Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com> --- I've tested this patch on Mediatek Genio 510-EVK board with a kernel based on linux-next (tag: next-20250331). --- arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- base-commit: 1c4df70331c0dc7f82f724166575c16931ec66b3 change-id: 20250328-mtk-genio-510-700-fix-bt-detection-2711cbcbb2e4 Best regards,