[PATCH v3] arm64: dts: qcom: kaanapali: Add mode-switch to the USB controller

[PATCH v3] arm64: dts: qcom: kaanapali: Add mode-switch to the USB controller

[Joonhoe Kim]

When the USB3-DP combo PHY is a mode switch, DisplayPort pin
assignments C and E put it in DP-only mode, where it stops the USB3
PIPE clock. Add mode-switch to the USB controller as well, so that it
gets the Type-C mode, moves to the UTMI clock first and keeps its USB
2.0 port working.

Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Signed-off-by: Joonhoe Kim <26rote@gmail.com>
---
Depends on:
- "usb: dwc3: qcom: Keep USB 2.0 working in DisplayPort-only modes",
  which adds the binding and registers the mux in dwc3-qcom. Without
  it, pmic_glink_altmode defers its probe indefinitely:
  https://lore.kernel.org/all/20261112113838.506-1-26rote@gmail.com/
- patch 3 of Balaji Kalkonda's Kaanapali DisplayPort series, which
  makes usb_dp_qmpphy a mode switch:
  https://lore.kernel.org/all/20261022-kaanapali_dp-v3-3-b5ae8e6083c3@oss.qualcomm.com/
- with dwc3-qcom built as a module, Yongxing Mou's "drm/bridge:
  aux-hpd-bridge: replay last HPD status on hpd_enable", or a monitor
  attached at boot is not detected:
  https://lore.kernel.org/all/20260803-drm-usbdp-preboot-v1-1-2539b362be00@oss.qualcomm.com/

Changes in v3:
- Sent on its own, split from the dwc3 series (Krzysztof)
- Subject and message: the controller gets the mode, it does not switch
  anything
- v2: https://lore.kernel.org/all/20261103135057.1682-4-26rote@gmail.com/

 arch/arm64/boot/dts/qcom/kaanapali.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/qcom/kaanapali.dtsi b/arch/arm64/boot/dts/qcom/kaanapali.dtsi
index e48a179d0722..a06d5d867488 100644
--- a/arch/arm64/boot/dts/qcom/kaanapali.dtsi
+++ b/arch/arm64/boot/dts/qcom/kaanapali.dtsi
@@ -3941,6 +3941,7 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
 			tx-fifo-resize;
 			dma-coherent;
 
+			mode-switch;
 			usb-role-switch;
 			wakeup-source;
 

base-commit: ddfe51b0a0f5dc9e415cc2c8ad8db17532dd426b
prerequisite-patch-id: a793fca7329dac964c21459f8d7a8b003d36d84d
prerequisite-patch-id: 0f4b3497a5b65f978f8ee3de20953e111d9a4721
prerequisite-patch-id: c6020a82fa07088ac3e07cc89d3059fff044d39e
-- 
2.43.0