4 files changed, 43 insertions, 4 deletions
diff --git a/src/mainboard/google/corsola/display.c b/src/mainboard/google/corsola/display.c
index a66d92e8e3..79f6b81d53 100644
--- a/src/mainboard/google/corsola/display.c
+++ b/src/mainboard/google/corsola/display.c
@@ -3,6 +3,7 @@
 #include <boardid.h>
 #include <cbfs.h>
 #include <console/console.h>
+#include <device/i2c_simple.h>
 #include <edid.h>
 #include <gpio.h>
 #include <soc/ddp.h>
@@ -13,12 +14,31 @@
 #include "display.h"
 #include "gpio.h"
 
+void aw37503_init(unsigned int bus)
+{
+	i2c_write_field(bus, PMIC_AW37503_SLAVE, 0x00, 0x14, 0x1F, 0);
+	i2c_write_field(bus, PMIC_AW37503_SLAVE, 0x01, 0x14, 0x1F, 0);
+	i2c_write_field(bus, PMIC_AW37503_SLAVE, 0x21, 0x4C, 0xFF, 0);
+	i2c_write_field(bus, PMIC_AW37503_SLAVE, 0x03, 0x43, 0xFF, 0);
+	i2c_write_field(bus, PMIC_AW37503_SLAVE, 0x21, 0x00, 0xFF, 0);
+}
+
+bool is_pmic_aw37503(unsigned int bus)
+{
+	u8 vendor_id;
+	return (!i2c_read_field(bus, PMIC_AW37503_SLAVE,
+				0x04, &vendor_id, 0x0F, 0) && vendor_id == 0x01);
+}
+
 static void backlight_control(void)
 {
 	/* Disable backlight before turning on bridge */
 	gpio_output(GPIO_AP_EDP_BKLTEN, 0);
 	gpio_output(GPIO_BL_PWM_1V8, 0);
-	gpio_output(GPIO_EN_PP3300_DISP_X, 1);
+	/* For staryu variants, GPIO_EN_PP3300_DISP_X is controlled in
+	   mipi_panel_power_on() */
+	if (!CONFIG(BOARD_GOOGLE_STARYU_COMMON))
+		gpio_output(GPIO_EN_PP3300_DISP_X, 1);
 }
 
 struct panel_description *get_panel_from_cbfs(struct panel_description *desc)
diff --git a/src/mainboard/google/corsola/display.h b/src/mainboard/google/corsola/display.h
index 11d2f24faf..7631bb9bae 100644
--- a/src/mainboard/google/corsola/display.h
+++ b/src/mainboard/google/corsola/display.h
@@ -8,7 +8,8 @@
 #include <soc/i2c.h>
 
 #define BRIDGE_I2C		I2C0
-#define PMIC_TPS65132_I2C	I2C6
+#define PMIC_AW37503_SLAVE	0x3E
+#define PMIC_I2C_BUS		I2C6
 
 struct panel_description {
 	void (*power_on)(void);	/* Callback to turn on panel */
@@ -18,6 +19,8 @@ struct panel_description {
 	enum lb_fb_orientation orientation;
 };
 
+void aw37503_init(unsigned int bus);
+bool is_pmic_aw37503(unsigned int bus);
 int configure_display(void);
 uint32_t panel_id(void);
 
diff --git a/src/mainboard/google/corsola/mainboard.c b/src/mainboard/google/corsola/mainboard.c
index b6823c671c..b2c65eb411 100644
--- a/src/mainboard/google/corsola/mainboard.c
+++ b/src/mainboard/google/corsola/mainboard.c
@@ -48,6 +48,13 @@ static void mainboard_init(struct device *dev)
 		if (configure_display() < 0)
 			printk(BIOS_ERR, "%s: Failed to init display\n", __func__);
 	} else {
+		if (CONFIG(BOARD_GOOGLE_STARYU_COMMON)) {
+			mtk_i2c_bus_init(PMIC_I2C_BUS, I2C_SPEED_FAST);
+			if (is_pmic_aw37503(PMIC_I2C_BUS)) {
+				printk(BIOS_DEBUG, "Initialize PMIC AW37503\n");
+				aw37503_init(PMIC_I2C_BUS);
+			}
+		}
 		printk(BIOS_INFO, "%s: Skipped display init\n", __func__);
 	}
 }
diff --git a/src/mainboard/google/corsola/panel_starmie.c b/src/mainboard/google/corsola/panel_starmie.c
index 9306960309..106f722080 100644
--- a/src/mainboard/google/corsola/panel_starmie.c
+++ b/src/mainboard/google/corsola/panel_starmie.c
@@ -18,7 +18,7 @@ static void mipi_panel_power_on(void)
 		{ PMIC_TPS65132_ASSDD, 0x5b, 0xFF },
 	};
 	const struct tps65132s_cfg cfg = {
-		.i2c_bus = PMIC_TPS65132_I2C,
+		.i2c_bus = PMIC_I2C_BUS,
 		.en = GPIO_EN_PP3300_DISP_X,
 		.sync = GPIO_EN_PP3300_SDBRDG_X,
 		.settings = reg_settings,
@@ -26,8 +26,17 @@ static void mipi_panel_power_on(void)
 	};
 
 	mainboard_set_regulator_voltage(MTK_REGULATOR_VIO18, 1800000);
-	if (tps65132s_setup(&cfg) != CB_SUCCESS)
+	mtk_i2c_bus_init(PMIC_I2C_BUS, I2C_SPEED_FAST);
+
+	if (is_pmic_aw37503(PMIC_I2C_BUS)) {
+		printk(BIOS_DEBUG, "Initialize and power on PMIC AW37503\n");
+		aw37503_init(PMIC_I2C_BUS);
+		gpio_output(GPIO_EN_PP3300_DISP_X, 1);
+		mdelay(2);
+		gpio_output(GPIO_EN_PP3300_SDBRDG_X, 1);
+	} else if (tps65132s_setup(&cfg) != CB_SUCCESS) {
 		printk(BIOS_ERR, "Failed to setup tps65132s\n");
+	}
 
 	/* DISP_RST_1V8_L */
 	gpio_output(GPIO_EDPBRDG_RST_L, 1);