Messages in this thread | | | Date | Fri, 12 May 2023 11:37:17 +0200 | From | Johan Hovold <> | Subject | Re: [PATCH v2 6/8] phy: qcom-qmp-combo: Introduce drm_bridge |
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On Tue, May 09, 2023 at 08:19:28PM -0700, Bjorn Andersson wrote: > The QMP combo PHY sits in an of_graph connected between the DisplayPort > controller and a USB Type-C connector (or possibly a redriver). > > The TCPM needs to be able to convey the HPD signal to the DisplayPort > controller, but no directly link is provided by DeviceTree so the signal > needs to "pass through" the QMP combo phy. > > Handle this by introducing a drm_bridge which upon initialization finds > the next bridge (i.e. the usb-c-connector) and chain this together. This > way HPD changes in the connector will propagate to the DisplayPort > driver. > > The connector bridge is resolved lazily, as the TCPM is expected to be > able to resolve the typec mux and switch at probe time, so the QMP combo > phy will probe before the TCPM. > > Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com> > Acked-by: Neil Armstrong <neil.armstrong@linaro.org> > Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> > Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> > Tested-by: Abel Vesa <abel.vesa@linaro.org> > Tested-by: Steev Klimaszewski <steev@kali.org> > Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on HDK8450 > Tested-by: Johan Hovold <johan+linaro@kernel.org> # X13s > --- > > Changes since v1: > - Wrap DRM-related code in CONFIG_DRM guard > - Inroduce DRM-dependencies in Kconfig > - Dropped dev_err_probe() usage
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
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