[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <uozgwot7yuwmaiwmqoo6ickblpqe52tnj44tnxcorygqxwou52@hksvktgq5zp7>
Date: Tue, 30 Sep 2025 21:56:25 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>, Xilin Wu <sophon@...xa.com>,
linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/3] phy: qcom: qmp-combo: get the USB3 & DisplayPort
lanes mapping from DT
On Tue, Sep 30, 2025 at 09:39:48AM +0200, Neil Armstrong wrote:
> The QMP USB3/DP Combo PHY hosts an USB3 phy and a DP PHY on top
> of a combo glue to route either lanes to the 4 shared physical lanes.
>
> The routing of the lanes can be:
> - 2 DP + 2 USB3
> - 4 DP
> - 2 USB3
>
> Get the lanes mapping from DT and stop registering the USB-C
> muxes in favor of a static mode and orientation detemined
> by the lanes mapping.
>
> This allows supporting boards with direct connection of USB3 and
> DisplayPort lanes to the QMP Combo PHY lanes, not using the
> USB-C Altmode feature.
>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
> drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 145 ++++++++++++++++++++++++++++--
> 1 file changed, 137 insertions(+), 8 deletions(-)
>
> @@ -4167,9 +4269,41 @@ static int qmp_combo_probe(struct platform_device *pdev)
> if (ret)
> goto err_node_put;
>
> - ret = qmp_combo_typec_register(qmp);
> - if (ret)
> - goto err_node_put;
> + qmp->qmpphy_mode = QMPPHY_MODE_USB3DP;
> +
> + if (of_find_property(dev->of_node, "mode-switch", NULL) ||
> + of_find_property(dev->of_node, "orientation-switch", NULL)) {
> + ret = qmp_combo_typec_register(qmp);
> + if (ret)
> + goto err_node_put;
> + } else {
> + enum typec_orientation dp_orientation = TYPEC_ORIENTATION_NONE;
> + enum typec_orientation usb3_orientation = TYPEC_ORIENTATION_NONE;
> +
> + ret = qmp_combo_get_dt_dp_orientation(dev, &dp_orientation);
> + if (ret)
> + goto err_node_put;
> +
> + ret = qmp_combo_get_dt_usb3_orientation(dev, &usb3_orientation);
> + if (ret)
> + goto err_node_put;
> +
> + if (dp_orientation == TYPEC_ORIENTATION_NONE &&
> + usb3_orientation != TYPEC_ORIENTATION_NONE) {
> + qmp->qmpphy_mode = QMPPHY_MODE_USB3_ONLY;
> + qmp->orientation = usb3_orientation;
> + } else if (usb3_orientation == TYPEC_ORIENTATION_NONE &&
> + dp_orientation != TYPEC_ORIENTATION_NONE) {
> + qmp->qmpphy_mode = QMPPHY_MODE_DP_ONLY;
> + qmp->orientation = dp_orientation;
> + } else if (dp_orientation != TYPEC_ORIENTATION_NONE &&
> + dp_orientation == usb3_orientation) {
> + qmp->qmpphy_mode = QMPPHY_MODE_USB3DP;
> + qmp->orientation = dp_orientation;
> + } else {
> + dev_warn(dev, "unable to determine orientation & mode from data-lanes");
> + }
> + }
>
> ret = drm_aux_bridge_register(dev);
> if (ret)
> @@ -4189,11 +4323,6 @@ static int qmp_combo_probe(struct platform_device *pdev)
> if (ret)
> goto err_node_put;
>
> - /*
> - * The hw default is USB3_ONLY, but USB3+DP mode lets us more easily
> - * check both sub-blocks' init tables for blunders at probe time.
> - */
> - qmp->qmpphy_mode = QMPPHY_MODE_USB3DP;
SHouldn't this still be a default in the 'normal' USB-C case?
>
> qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
> if (IS_ERR(qmp->usb_phy)) {
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
Powered by blists - more mailing lists