[S] Change in coreboot[master]: mb/google/geralt: Add mtcmos bus protection for display

[jason-ch chen (Code Review)]

Attention is currently required from: Liju-Clr Chen.

Hello Liju-Clr Chen,

I'd like you to do a code review.
Please visit

https://review.coreboot.org/c/coreboot/+/73411

to review the following change.

Change subject: mb/google/geralt: Add mtcmos bus protection for display
......................................................................

mb/google/geralt: Add mtcmos bus protection for display

Bus protection is a HW mechanism to avoid bus hang and incomplete bus
transactions. Add mtcmos bus protection for display to enable Bus
protection HW while the receiver of the transactin is not able to
respond.

BUG=b:264204465
TEST=test firmware and kernel display pass for MIPI panel on proto board.

Change-Id: Iac61a69f2b84966dd468442daaa59d83eec775aa
Signed-off-by: Liju-Clr Chen 
---
M src/mainboard/google/geralt/display.c
1 file changed, 19 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/11/73411/1

diff --git a/src/mainboard/google/geralt/display.c b/src/mainboard/google/geralt/display.c
index 396d6e0..bbdd808 100644
--- a/src/mainboard/google/geralt/display.c
+++ b/src/mainboard/google/geralt/display.c
@@ -27,6 +27,7 @@
    printk(BIOS_INFO, "%s: Starting display initialization\n", __func__);

mtcmos_display_power_on();
+	mtcmos_protect_display_bus();

panel->configure_panel_backlight();
    panel->power_on();