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Diffstat (limited to 'src/mainboard/google/veyron_danger')
-rw-r--r--src/mainboard/google/veyron_danger/board.h1
-rw-r--r--src/mainboard/google/veyron_danger/mainboard.c13
2 files changed, 13 insertions, 1 deletions
diff --git a/src/mainboard/google/veyron_danger/board.h b/src/mainboard/google/veyron_danger/board.h
index 10bcf459b2..a2f400091d 100644
--- a/src/mainboard/google/veyron_danger/board.h
+++ b/src/mainboard/google/veyron_danger/board.h
@@ -25,6 +25,7 @@
#define GPIO_BACKLIGHT GPIO(7, A, 3)
#define GPIO_RESET GPIO(0, B, 5)
+#define GPIO_LCDC_BL GPIO(7, A, 7)
void setup_chromeos_gpios(void);
diff --git a/src/mainboard/google/veyron_danger/mainboard.c b/src/mainboard/google/veyron_danger/mainboard.c
index b664d55804..9bb5cb1a59 100644
--- a/src/mainboard/google/veyron_danger/mainboard.c
+++ b/src/mainboard/google/veyron_danger/mainboard.c
@@ -93,6 +93,17 @@ static void configure_vop(void)
/* lcdc(vop) iodomain select 1.8V */
write32(&rk3288_grf->io_vsel, RK_SETBITS(1 << 0));
+ /*
+ * BL_EN gates VCC_LCD. This might be changed in future revisions
+ * of the board so that the display can be stablized before we
+ * turn on the backlight.
+ *
+ * To minimize display corruption, turn off LCDC_BL before
+ * powering on the backlight.
+ */
+ gpio_output(GPIO_BACKLIGHT, 1); /* BL_EN */
+ gpio_output(GPIO_LCDC_BL, 0);
+
rk808_configure_switch(2, 1); /* VCC18_LCD (HDMI_AVDD_1V8) */
rk808_configure_ldo(7, 1000); /* VDD10_LCD (HDMI_AVDD_1V0) */
rk808_configure_switch(1, 1); /* VCC33_LCD */
@@ -135,5 +146,5 @@ void lb_board(struct lb_header *header)
void mainboard_power_on_backlight(void)
{
- gpio_output(GPIO_BACKLIGHT, 1); /* BL_EN */
+ gpio_output(GPIO_LCDC_BL, 1);
}