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-rw-r--r--src/mainboard/google/pit/mainboard.c39
1 files changed, 35 insertions, 4 deletions
diff --git a/src/mainboard/google/pit/mainboard.c b/src/mainboard/google/pit/mainboard.c
index 64783ad803..67d3b5d0ab 100644
--- a/src/mainboard/google/pit/mainboard.c
+++ b/src/mainboard/google/pit/mainboard.c
@@ -34,6 +34,7 @@
#include <cpu/samsung/exynos5420/power.h>
#include <cpu/samsung/exynos5420/i2c.h>
#include <cpu/samsung/exynos5420/dp-core.h>
+#include <ec/google/chromeec/ec.h>
#include "exynos5420.h"
@@ -57,8 +58,6 @@ static enum exynos5_gpio_pin bl_en = GPIO_X22; /* active high */
static void exynos_dp_bridge_setup(void)
{
- exynos_pinmux_dphpd();
-
gpio_set_value(dp_pd_l, 1);
gpio_cfg_pin(dp_pd_l, GPIO_OUTPUT);
gpio_set_pull(dp_pd_l, GPIO_PULL_NONE);
@@ -68,6 +67,8 @@ static void exynos_dp_bridge_setup(void)
gpio_set_pull(dp_rst_l, GPIO_PULL_NONE);
udelay(10);
gpio_set_value(dp_rst_l, 1);
+
+ gpio_cfg_pin(dp_hpd, GPIO_INPUT);
}
static void exynos_dp_bridge_init(void)
@@ -170,6 +171,35 @@ static void gpio_init(void)
exynos_pinmux_i2c10();
}
+enum {
+ FET_CTRL_WAIT = 3 << 2,
+ FET_CTRL_ADENFET = 1 << 1,
+ FET_CTRL_ENFET = 1 << 0
+};
+
+static void tps65090_thru_ec_fet_set(int index)
+{
+ uint8_t value = FET_CTRL_ADENFET | FET_CTRL_WAIT | FET_CTRL_ENFET;
+
+ if (google_chromeec_i2c_xfer(0x48, 0xe + index, 1, &value, 1, 0)) {
+ printk(BIOS_ERR,
+ "Error sending i2c pass through command to EC.\n");
+ return;
+ }
+}
+
+static void lcd_vdd(void)
+{
+ /* Enable FET6, lcd panel */
+ tps65090_thru_ec_fet_set(6);
+}
+
+static void backlight_vdd(void)
+{
+ /* Enable FET1, backlight */
+ tps65090_thru_ec_fet_set(1);
+}
+
/* this happens after cpu_init where exynos resources are set */
static void mainboard_init(device_t dev)
{
@@ -193,7 +223,7 @@ static void mainboard_init(device_t dev)
fb_addr = cbmem_find(CBMEM_ID_CONSOLE);
set_vbe_mode_info_valid(&edid, (uintptr_t)fb_addr);
- // XXX Turn on the LCD power here.
+ lcd_vdd();
// FIXME: should timeout
do {
@@ -204,6 +234,7 @@ static void mainboard_init(device_t dev)
for (dp_tries = 1; dp_tries <= MAX_DP_TRIES; dp_tries++) {
exynos_dp_bridge_init();
if (exynos_dp_hotplug()) {
+ printk(BIOS_ERR, "Hotplug detect failed.\n");
exynos_dp_reset();
continue;
}
@@ -213,7 +244,7 @@ static void mainboard_init(device_t dev)
udelay(LCD_T3_DELAY_MS * 1000);
- // XXX Turn on the backlight power here.
+ backlight_vdd();
backlight_pwm();
backlight_en();
/* if we're here, we're successful */