Re: [PATCH 04/10] phy: qcom-usb-hsic: engage HSIC mode from phy_calibrate()
Konrad Dybcio <[email protected]>
| Newsgroups | org.infradead.lists.linux-phy,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-gpio,org.kernel.vger.linux-kernel,org.kernel.vger.linux-usb |
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| Message-ID | <[email protected]> |
On 8/10/26 5:42 PM, Dmitry Baryshkov wrote: > The PHY power-on sequence ends by engaging HSIC mode. With chipidea, > power-on runs before the host is started, and the HSIC connect of an > already-present device is latched at the moment HSIC mode is engaged: > performed before the host runs (and before an onboard hub is taken out > of reset), the connect is lost and the device is never seen. This is > why the APQ8074 dragonboard USB4604 hub never enumerated on mainline > while the vendor kernel - which performs the whole PHY sequence after > usb_add_hcd() - sees it on every boot. > > Keep the calibration setup and the pad mux in power-on, and move the > HSIC mode enable (and the auto-resume disable) into the calibrate op, > which the chipidea host now invokes after the host is up and the > onboard device reset has been released. > > Assisted-by: Claude:claude-fable-5 > Signed-off-by: Dmitry Baryshkov <[email protected]> > --- Reviewed-by: Konrad Dybcio <[email protected]> Konrad -- linux-phy mailing list [email protected] https://lists.infradead.org/mailman/listinfo/linux-phy