lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20250908-topic-x1e80100-hdmi-v3-4-c53b0f2bc2fb@linaro.org>
Date: Mon, 08 Sep 2025 15:04:21 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 linux-phy@...ts.infradead.org, Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v3 4/5] phy: qcom: qmp-combo: get the USB3 & DisplayPort
 lanes mapping from DT

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 | 132 ++++++++++++++++++++++++++++--
 1 file changed, 124 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 7b5af30f1d028c592500e723ecd27b54ed554709..f3f91a69dc8b81e049cd06f7ab4f04baf57776cd 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_graph.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
@@ -1744,6 +1745,21 @@ static const u8 qmp_dp_v6_pre_emphasis_hbr_rbr[4][4] = {
 	{ 0x22, 0xff, 0xff, 0xff }
 };
 
+static const u32 usb3_data_lane_mapping[][2] = {
+	[TYPEC_ORIENTATION_NORMAL] = { 1, 0 },
+	[TYPEC_ORIENTATION_REVERSE] = { 2, 3 },
+};
+
+static const u32 dp_2_data_lanes_mapping[][2] = {
+	[TYPEC_ORIENTATION_NORMAL] = { 0, 1 },
+	[TYPEC_ORIENTATION_REVERSE] = { 3, 2 },
+};
+
+static const u32 dp_4_data_lanes_mapping[][4] = {
+	[TYPEC_ORIENTATION_NORMAL] = { 0, 1, 2, 3 },
+	[TYPEC_ORIENTATION_REVERSE] = { 3, 2, 1, 0 },
+};
+
 struct qmp_combo;
 
 struct qmp_combo_offsets {
@@ -4167,9 +4183,114 @@ 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 usb3_orientation = TYPEC_ORIENTATION_NONE;
+		enum typec_orientation dp_orientation = TYPEC_ORIENTATION_NONE;
+		struct device_node *usb3_ep, *dp_ep;
+		u32 data_lanes[4];
+		int count, i;
+
+		usb3_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+		dp_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, 1);
+
+		if (usb3_ep) {
+			ret = of_property_count_u32_elems(usb3_ep, "data-lanes");
+			if (ret == -EINVAL)
+				/* Property isn't here, ignore property */
+				goto usb3_mapping_done;
+			if (ret < 0)
+				goto err_node_put;
+
+			count = ret;
+			if (count != 2)
+				/* Property size is invalid, ignore property */
+				goto usb3_mapping_done;
+
+			ret = of_property_read_u32_array(usb3_ep, "data-lanes", data_lanes, count);
+			if (ret)
+				goto err_node_put;
+
+			for (i = TYPEC_ORIENTATION_NORMAL; i <= TYPEC_ORIENTATION_REVERSE; i++)
+				if (!memcmp(data_lanes, usb3_data_lane_mapping[i], sizeof(u32) * 2))
+					break;
+
+			if (i >= TYPEC_ORIENTATION_REVERSE)
+				/* Property value is invalid, ignore property */
+				goto usb3_mapping_done;
+
+			usb3_orientation = i;
+		}
+
+usb3_mapping_done:
+		of_node_put(usb3_ep);
+
+		if (dp_ep) {
+			ret = of_property_count_u32_elems(dp_ep, "data-lanes");
+			if (ret == -EINVAL)
+				/* Property isn't here, ignore property */
+				goto dp_mapping_done;
+			if (ret < 0)
+				goto err_node_put;
+
+			count = ret;
+			if (count != 2 && count != 4)
+				/* Property size is invalid, ignore property */
+				goto dp_mapping_done;
+
+			ret = of_property_read_u32_array(dp_ep, "data-lanes", data_lanes, count);
+
+			if (ret)
+				goto err_node_put;
+
+			for (i = TYPEC_ORIENTATION_NORMAL; i <= TYPEC_ORIENTATION_REVERSE; i++) {
+				switch (count) {
+				case 2:
+					ret = memcmp(data_lanes, dp_2_data_lanes_mapping[i],
+						      sizeof(u32) * count);
+					break;
+				case 4:
+					ret = memcmp(data_lanes, dp_4_data_lanes_mapping[i],
+						     sizeof(u32) * count);
+					break;
+				}
+
+				if (!ret)
+					break;
+			}
+
+			if (i >= TYPEC_ORIENTATION_REVERSE)
+				/* Property value is invalid, ignore property */
+				goto dp_mapping_done;
+
+			dp_orientation = i;
+		}
+
+dp_mapping_done:
+		of_node_put(dp_ep);
+
+		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 +4310,6 @@ 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;
 
 	qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
 	if (IS_ERR(qmp->usb_phy)) {

-- 
2.34.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ