[S] Change in coreboot[main]: mb/google/rex: Add function to convert TCSS port to EC port

[Derek Huang (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eran Mitrani, Jakub "Kuba" Czapiga, Kapil Porwal, Subrata Banik, Tarun.

Derek Huang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/86674?usp=email )

Change subject: mb/google/rex: Add function to convert TCSS port to EC port
......................................................................

mb/google/rex: Add function to convert TCSS port to EC port

This patch implements mainboard_retimer_get_index_for_typec
function. This function calls variant override function which
should be implemented by the variant if the port mapping is not
sequential.

BUG=b:399032094
TEST=build and verify the TCSS port and EC port mapping

Change-Id: I71798a2b0f0802f78a6ae7b9d7a2f882611775e6
Signed-off-by: Derek Huang 
---
M src/mainboard/google/rex/mainboard.c
M src/mainboard/google/rex/variants/baseboard/include/baseboard/variants.h
2 files changed, 14 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/86674/1

diff --git a/src/mainboard/google/rex/mainboard.c b/src/mainboard/google/rex/mainboard.c
index 66e1e69..2453ded 100644
--- a/src/mainboard/google/rex/mainboard.c
+++ b/src/mainboard/google/rex/mainboard.c
@@ -5,6 +5,7 @@
 #include <baseboard/gpio.h>
 #include <baseboard/variants.h>
 #include <device/device.h>
+#include <drivers/intel/usb4/retimer/retimer.h>
 #include <drivers/wwan/fm/chip.h>
 #include <ec/ec.h>
 #include <fw_config.h>
@@ -16,6 +17,12 @@

WEAK_DEV_PTR(rp6_wwan);

+__weak int variant_retimer_get_index_for_typec(uint8_t typec_port)
+{
+	/* default implementation does nothing */
+	return -1;
+}
+
 void __weak fw_config_gpio_padbased_override(struct pad_config *padbased_table)
 {
    /* default implementation does nothing */
@@ -31,6 +38,11 @@
    /* default implementation does nothing */
 }

+int mainboard_retimer_get_index_for_typec(uint8_t typec_port)
+{
+	return variant_retimer_get_index_for_typec(typec_port);
+}
+
 static void mainboard_init(void *chip_info)
 {
    struct pad_config *padbased_table;
diff --git a/src/mainboard/google/rex/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/rex/variants/baseboard/include/baseboard/variants.h
index 8a97d00..93d67dd 100644
--- a/src/mainboard/google/rex/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/rex/variants/baseboard/include/baseboard/variants.h
@@ -38,5 +38,7 @@
 void baseboard_devtree_update(void);
 /* Modify devictree settings during ramstage by dedicated variant */
 void variant_devtree_update(void);
+/* Convert CPU physical port to EC logical port by dedicated variant */
+int variant_retimer_get_index_for_typec(uint8_t typec_port);

#endif /*__BASEBOARD_VARIANTS_H__ */