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| author | Bjorn Andersson <quic_bjorande@quicinc.com> | 2023-05-14 20:27:41 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-05-19 23:17:19 +0530 |
| commit | 1904c3f578dce06760160cc5b728c960cd7db633 (patch) | |
| tree | e1a66ec4f9c83e9ecf79db3cfff0657dea410ddf /drivers/phy/qualcomm/Kconfig | |
| parent | 2851117f8f4218043e4c05d24494fee66e932cbe (diff) | |
| download | linux-stable-1904c3f578dce06760160cc5b728c960cd7db633.tar.gz linux-stable-1904c3f578dce06760160cc5b728c960cd7db633.tar.bz2 linux-stable-1904c3f578dce06760160cc5b728c960cd7db633.zip | |
phy: qcom-qmp-combo: Introduce drm_bridge
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.
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
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/r/20230515032743.400170-7-quic_bjorande@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy/qualcomm/Kconfig')
| -rw-r--r-- | drivers/phy/qualcomm/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/phy/qualcomm/Kconfig b/drivers/phy/qualcomm/Kconfig index 45330e0f66fe..67a45d95250d 100644 --- a/drivers/phy/qualcomm/Kconfig +++ b/drivers/phy/qualcomm/Kconfig @@ -60,8 +60,10 @@ config PHY_QCOM_QMP_COMBO tristate "Qualcomm QMP Combo PHY Driver" default PHY_QCOM_QMP depends on TYPEC || TYPEC=n + depends on DRM || DRM=n select GENERIC_PHY select MFD_SYSCON + select DRM_PANEL_BRIDGE if DRM help Enable this to support the QMP Combo PHY transceiver that is used with USB3 and DisplayPort controllers on Qualcomm chips. |