Handle orientation for the type-c port when the DT node has the
'orientation' property. The 'orientation' property is present when the
DisplayPort lanes are directly wired to the usb-c-connector and the
board design relies on the DP lanes to be remapped by software. The
property wouldn't be present if, for example, the EC controls a port
mapper part that flips the DP lanes for the port orientation.
Pass the port orientation to drm_dp_typec_bridge_assign_pins() when the
DT property is present so that the previous drm_bridge in the bridge
chain can remap the DP lanes to the right usb-c-connector SuperSpeed
pins for the orientation.
Cc: Prashant Malani <pmal...@chromium.org>
Cc: Benson Leung <ble...@chromium.org>
Cc: Tzung-Bi Shih <tzun...@kernel.org>
Cc: <chrome-platf...@lists.linux.dev>
Cc: Pin-yen Lin <treapk...@chromium.org>
Signed-off-by: Stephen Boyd <swb...@chromium.org>
---
drivers/platform/chrome/cros_ec_typec.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec_typec.c
b/drivers/platform/chrome/cros_ec_typec.c
index fa7f7efb9d3f..9b54b3288f5f 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -28,6 +28,7 @@ struct cros_typec_dp_bridge {
struct cros_typec_data *typec_data;
struct drm_dp_typec_bridge_dev *dev;
struct cros_typec_port *active_port;
+ bool orientation;
};
#define DP_PORT_VDO (DP_CONF_SET_PIN_ASSIGN(BIT(DP_PIN_ASSIGN_C) |
BIT(DP_PIN_ASSIGN_D)) | \
@@ -449,13 +450,15 @@ static int cros_typec_init_dp_bridge(struct
cros_typec_data *typec)
struct device *dev = typec->dev;
struct cros_typec_dp_bridge *dp_bridge;
struct fwnode_handle *ep __free(fwnode_handle);
+ struct fwnode_handle *devnode;
struct drm_dp_typec_bridge_dev *dp_dev;
int num_lanes;
struct drm_dp_typec_bridge_desc desc = {
.of_node = dev->of_node,
};
- ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
+ devnode = dev_fwnode(dev);
+ ep = fwnode_graph_get_endpoint_by_id(devnode, 0, 0, 0);
if (!ep) {
/* There isn't a DP input endpoint. Ignore. */
return 0;
@@ -467,6 +470,8 @@ static int cros_typec_init_dp_bridge(struct cros_typec_data
*typec)
typec->dp_bridge = dp_bridge;
dp_bridge->typec_data = typec;
+ dp_bridge->orientation = fwnode_property_read_bool(devnode,
"orientation");
+
num_lanes = fwnode_property_count_u32(ep, "data-lanes");
if (num_lanes < 0)
num_lanes = 4;
@@ -582,6 +587,7 @@ static int cros_typec_enable_dp(struct cros_typec_data
*typec,
u32 cable_tbt_vdo;
u32 cable_dp_vdo;
int ret;
+ enum typec_orientation orientation;
bool hpd_asserted = port->mux_flags & USB_PD_MUX_HPD_LVL;
if (typec->pd_ctrl_ver < 2) {
@@ -622,7 +628,13 @@ static int cros_typec_enable_dp(struct cros_typec_data
*typec,
}
if (dp_bridge && dp_bridge->active_port == port) {
- ret = drm_dp_typec_bridge_assign_pins(dp_bridge->dev,
dp_data.conf, 0,
+ orientation = TYPEC_ORIENTATION_NORMAL;
+ if (dp_bridge->orientation &&
+ port->mux_flags & USB_PD_MUX_POLARITY_INVERTED)
+ orientation = TYPEC_ORIENTATION_REVERSE;
+
+ ret = drm_dp_typec_bridge_assign_pins(dp_bridge->dev,
dp_data.conf,
+ orientation,
port->lane_mapping);
if (ret)
return ret;
--
https://chromeos.dev
