diff options
| author | Neil Armstrong <neil.armstrong@linaro.org> | 2023-06-19 11:07:14 +0300 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2023-08-01 00:19:18 +0300 |
| commit | 0549bc385f3534c380acbd7722cb6e14cca8c580 (patch) | |
| tree | 05b0978b0b86b7aaf33bc6eadf0d15ff644596d3 /drivers/soc | |
| parent | 1beecfe68f802e5d4218bb7c5a728f2f38c979c7 (diff) | |
| download | linux-0549bc385f3534c380acbd7722cb6e14cca8c580.tar.xz | |
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 <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230601-topic-sm8550-upstream-type-c-v5-2-9221cd300903@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/qcom/pmic_glink_altmode.c | 43 |
1 files changed, 43 insertions, 0 deletions
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 <linux/usb/typec_altmode.h> #include <linux/usb/typec_dp.h> #include <linux/usb/typec_mux.h> +#include <linux/usb/typec_retimer.h> #include <linux/soc/qcom/pmic_glink.h> @@ -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), |