usb: typec: Add support for Parade PS8830 Type-C Retimer

The Parade PS8830 is a USB4, DisplayPort and Thunderbolt 4 retimer,
controlled over I2C. It usually sits between a USB/DisplayPort PHY
and the Type-C connector, and provides orientation and altmode handling.

The boards that use this retimer are the ones featuring the Qualcomm
Snapdragon X Elite SoCs.

Add a driver with support for the following modes:
 - DisplayPort 4-lanes
 - DisplayPort 2-lanes + USB3
 - USB3

There is another variant of this retimer which is called PS8833. It seems
to be really similar to the PS8830, so future-proof this driver by
naming it ps883x.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250206-x1e80100-ps8830-v6-2-60b1e49cfa8d@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: abelvesa

drivers/usb/typec/mux/Kconfig

@@ -56,6 +56,16 @@ config TYPEC_MUX_NB7VPQ904M
 	  Say Y or M if your system has a On Semiconductor NB7VPQ904M Type-C
 	  redriver chip found on some devices with a Type-C port.
 
+config TYPEC_MUX_PS883X
+	tristate "Parade PS883x Type-C retimer driver"
+	depends on I2C
+	depends on DRM || DRM=n
+	select DRM_AUX_BRIDGE if DRM_BRIDGE && OF
+	select REGMAP_I2C
+	help
+	  Say Y or M if your system has a Parade PS883x Type-C retimer chip
+	  found on some devices with a Type-C port.
+
 config TYPEC_MUX_PTN36502
 	tristate "NXP PTN36502 Type-C redriver driver"
 	depends on I2C

drivers/usb/typec/mux/Makefile

@@ -6,6 +6,7 @@ obj-$(CONFIG_TYPEC_MUX_PI3USB30532)	+= pi3usb30532.o
 obj-$(CONFIG_TYPEC_MUX_INTEL_PMC)	+= intel_pmc_mux.o
 obj-$(CONFIG_TYPEC_MUX_IT5205)		+= it5205.o
 obj-$(CONFIG_TYPEC_MUX_NB7VPQ904M)	+= nb7vpq904m.o
+obj-$(CONFIG_TYPEC_MUX_PS883X)		+= ps883x.o
 obj-$(CONFIG_TYPEC_MUX_PTN36502)	+= ptn36502.o
 obj-$(CONFIG_TYPEC_MUX_TUSB1046)	+= tusb1046.o
 obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS)	+= wcd939x-usbss.o