Change in coreboot[master]: mb/google/corsola: Revise power-on sequence of PS8640

[Rex-BC Chen (Code Review)]

Rex-BC Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/62893 )

Change subject: mb/google/corsola: Revise power-on sequence of PS8640
......................................................................

mb/google/corsola: Revise power-on sequence of PS8640

The PS8640 vendor (Parade) suggests that the power-on sequence should
trigger GPIO_EDPBRDG_RST_L twice.

BUG=b:222650141
TEST=show fw display normally in krabby.

Signed-off-by: Rex-BC Chen 
Change-Id: I7706c56dc7fc13ac84c0d52a6e534bc0988e8fd3
---
M src/mainboard/google/corsola/display.c
1 file changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/93/62893/1

diff --git a/src/mainboard/google/corsola/display.c b/src/mainboard/google/corsola/display.c
index fd269ec..1e1af64 100644
--- a/src/mainboard/google/corsola/display.c
+++ b/src/mainboard/google/corsola/display.c
@@ -29,6 +29,10 @@
    gpio_output(GPIO_EDPBRDG_RST_L, 0);
    mdelay(2);
    gpio_output(GPIO_EDPBRDG_RST_L, 1);
+	mdelay(55);
+	gpio_output(GPIO_EDPBRDG_RST_L, 0);
+	mdelay(55);
+	gpio_output(GPIO_EDPBRDG_RST_L, 1);
 }

static int bridge_ps8640_get_edid(u8 i2c_bus, struct edid *edid)