[S] Change in coreboot[main]: mb/google/rex/var/karis: Enable audio BT offload

[Tyler Wang (Code Review)]

Tyler Wang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79210?usp=email )

Change subject: mb/google/rex/var/karis: Enable audio BT offload
......................................................................

mb/google/rex/var/karis: Enable audio BT offload

BUG=b:312099281
TEST=none

Change-Id: Icd2c42261fdcfa5aac17be28fde3804348ddf9b4
Signed-off-by: Tyler Wang 
---
M src/mainboard/google/rex/variants/karis/fw_config.c
M src/mainboard/google/rex/variants/karis/variant.c
2 files changed, 29 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/79210/1

diff --git a/src/mainboard/google/rex/variants/karis/fw_config.c b/src/mainboard/google/rex/variants/karis/fw_config.c
index 7211d8a..4209407 100644
--- a/src/mainboard/google/rex/variants/karis/fw_config.c
+++ b/src/mainboard/google/rex/variants/karis/fw_config.c
@@ -8,6 +8,25 @@

#define GPIO_PADBASED_OVERRIDE(b, a) gpio_padbased_override(b, a, ARRAY_SIZE(a))

+static const struct pad_config bt_i2s_enable_pads[] = {
+	/* GPP_V30 : [] ==> BT_I2S_BCLK */
+	PAD_CFG_NF(GPP_VGPIO30, NONE, DEEP, NF2),
+	/* GPP_V31 : [] ==> BT_I2S_SYNC */
+	PAD_CFG_NF(GPP_VGPIO31, NONE, DEEP, NF2),
+	/* GPP_V32 : [] ==> BT_I2S_SDO */
+	PAD_CFG_NF(GPP_VGPIO32, NONE, DEEP, NF2),
+	/* GPP_V33 : [] ==> BT_I2S_SDI */
+	PAD_CFG_NF(GPP_VGPIO33, NONE, DEEP, NF2),
+	/* GPP_V34 : [] ==> SSP2_SCLK */
+	PAD_CFG_NF(GPP_VGPIO34, NONE, DEEP, NF1),
+	/* GPP_V35 : [] ==> SSP2_SFRM */
+	PAD_CFG_NF(GPP_VGPIO35, NONE, DEEP, NF1),
+	/* GPP_V36 : [] ==> SSP_TXD */
+	PAD_CFG_NF(GPP_VGPIO36, NONE, DEEP, NF1),
+	/* GPP_V37 : [] ==> SSP_RXD */
+	PAD_CFG_NF(GPP_VGPIO37, NONE, DEEP, NF1),
+};
+
 static const struct pad_config fp_disable_pads[] = {
    /* GPP_B11 : [] ==> EN_FP_PWR */
    PAD_NC(GPP_B11, NONE),
@@ -42,4 +61,8 @@
    	printk(BIOS_INFO, "Configure GPIOs for no FP module.\n");
    	GPIO_PADBASED_OVERRIDE(padbased_table, fp_disable_pads);
    }
+	if (fw_config_probe(FW_CONFIG(AUDIO, ALC5650_NO_AMP_I2S))) {
+		printk(BIOS_INFO, "Configure GPIOs for BT offload mode.\n");
+		GPIO_PADBASED_OVERRIDE(padbased_table, bt_i2s_enable_pads);
+	}
 }
diff --git a/src/mainboard/google/rex/variants/karis/variant.c b/src/mainboard/google/rex/variants/karis/variant.c
index 308eea6..ecfd4f8 100644
--- a/src/mainboard/google/rex/variants/karis/variant.c
+++ b/src/mainboard/google/rex/variants/karis/variant.c
@@ -9,3 +9,9 @@
 {
    return get_wifi_sar_fw_config_filename(FW_CONFIG_FIELD(WIFI_TYPE));
 }
+
+void variant_update_soc_chip_config(struct soc_intel_meteorlake_config *config)
+{
+	if (fw_config_probe(FW_CONFIG(AUDIO, ALC5650_NO_AMP_I2S)))
+		config->cnvi_bt_audio_offload = true;
+}