From 0549bc385f3534c380acbd7722cb6e14cca8c580 Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Mon, 19 Jun 2023 10:07:14 +0200 Subject: soc: qcom: pmic_glink_altmode: add retimer-switch support Some boards have a retimer/redriver between the SuperSpeed PHY and the USB-C connector to compensates signal integrity losses mainly due to PCB & transmission cables. Add support for an optional retimer-switch in the USB-C connector graph. Signed-off-by: Neil Armstrong Link: https://lore.kernel.org/r/20230601-topic-sm8550-upstream-type-c-v5-2-9221cd300903@linaro.org Signed-off-by: Bjorn Andersson --- drivers/soc/qcom/pmic_glink_altmode.c | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'drivers/soc') diff --git a/drivers/soc/qcom/pmic_glink_altmode.c b/drivers/soc/qcom/pmic_glink_altmode.c index 297d5821c784..d05e0d6edf49 100644 --- a/drivers/soc/qcom/pmic_glink_altmode.c +++ b/drivers/soc/qcom/pmic_glink_altmode.c @@ -16,6 +16,7 @@ #include #include #include +#include #include @@ -69,6 +70,8 @@ struct pmic_glink_altmode_port { struct typec_switch *typec_switch; struct typec_mux *typec_mux; struct typec_mux_state state; + struct typec_retimer *typec_retimer; + struct typec_retimer_state retimer_state; struct typec_altmode dp_alt; struct work_struct work; @@ -158,6 +161,14 @@ static void pmic_glink_altmode_enable_dp(struct pmic_glink_altmode *altmode, ret = typec_mux_set(port->typec_mux, &port->state); if (ret) dev_err(altmode->dev, "failed to switch mux to DP\n"); + + port->retimer_state.alt = &port->dp_alt; + port->retimer_state.data = &dp_data; + port->retimer_state.mode = TYPEC_MODAL_STATE(mode); + + ret = typec_retimer_set(port->typec_retimer, &port->retimer_state); + if (ret) + dev_err(altmode->dev, "failed to setup retimer to DP\n"); } static void pmic_glink_altmode_enable_usb(struct pmic_glink_altmode *altmode, @@ -172,6 +183,14 @@ static void pmic_glink_altmode_enable_usb(struct pmic_glink_altmode *altmode, ret = typec_mux_set(port->typec_mux, &port->state); if (ret) dev_err(altmode->dev, "failed to switch mux to USB\n"); + + port->retimer_state.alt = NULL; + port->retimer_state.data = NULL; + port->retimer_state.mode = TYPEC_STATE_USB; + + ret = typec_retimer_set(port->typec_retimer, &port->retimer_state); + if (ret) + dev_err(altmode->dev, "failed to setup retimer to USB\n"); } static void pmic_glink_altmode_safe(struct pmic_glink_altmode *altmode, @@ -186,6 +205,14 @@ static void pmic_glink_altmode_safe(struct pmic_glink_altmode *altmode, ret = typec_mux_set(port->typec_mux, &port->state); if (ret) dev_err(altmode->dev, "failed to switch mux to safe mode\n"); + + port->retimer_state.alt = NULL; + port->retimer_state.data = NULL; + port->retimer_state.mode = TYPEC_STATE_SAFE; + + ret = typec_retimer_set(port->typec_retimer, &port->retimer_state); + if (ret) + dev_err(altmode->dev, "failed to setup retimer to USB\n"); } static void pmic_glink_altmode_worker(struct work_struct *work) @@ -348,6 +375,11 @@ static const struct drm_bridge_funcs pmic_glink_altmode_bridge_funcs = { .attach = pmic_glink_altmode_attach, }; +static void pmic_glink_altmode_put_retimer(void *data) +{ + typec_retimer_put(data); +} + static void pmic_glink_altmode_put_mux(void *data) { typec_mux_put(data); @@ -454,6 +486,17 @@ static int pmic_glink_altmode_probe(struct auxiliary_device *adev, if (ret) return ret; + alt_port->typec_retimer = fwnode_typec_retimer_get(fwnode); + if (IS_ERR(alt_port->typec_retimer)) + return dev_err_probe(dev, PTR_ERR(alt_port->typec_retimer), + "failed to acquire retimer-switch for port: %d\n", + port); + + ret = devm_add_action_or_reset(dev, pmic_glink_altmode_put_retimer, + alt_port->typec_retimer); + if (ret) + return ret; + alt_port->typec_switch = fwnode_typec_switch_get(fwnode); if (IS_ERR(alt_port->typec_switch)) return dev_err_probe(dev, PTR_ERR(alt_port->typec_switch), -- cgit v1.2.3