jitao shi has uploaded this change for review.

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google/krane: turn off backlight before config display

Turn off backlight before display config and then turn on backlight
after display config. Avoid flash white screen when configuring
display.

BUG=b:129299873
BRANCH=none

Change-Id: I91ae2fabdf1c00b0683085a03d3f48ad3b6b7879
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
M src/mainboard/google/kukui/panel_krane.c
1 file changed, 3 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/72/33572/1
diff --git a/src/mainboard/google/kukui/panel_krane.c b/src/mainboard/google/kukui/panel_krane.c
index cb6e9cf..55c7ff5 100644
--- a/src/mainboard/google/kukui/panel_krane.c
+++ b/src/mainboard/google/kukui/panel_krane.c
@@ -388,10 +388,11 @@
return false;
};

+/* Setup backlight control pins as output pin and power-off by default */
static int krane_backlight(struct board_display_intf *intf)
{
- gpio_output(GPIO(PERIPHERAL_EN13), 1);
- gpio_output(GPIO(DISP_PWM), 1); /* DISP_PWM0 */
+ gpio_output(GPIO(PERIPHERAL_EN13), 0);
+ gpio_output(GPIO(DISP_PWM), 0);

return 0;
};

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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: I91ae2fabdf1c00b0683085a03d3f48ad3b6b7879
Gerrit-Change-Number: 33572
Gerrit-PatchSet: 1
Gerrit-Owner: jitao shi <jitao.shi@mediatek.com>
Gerrit-MessageType: newchange