[XS] Change in coreboot[main]: mb/google/geralt: Increase VM18 LDO voltage to 1.9V for Ciri

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/80198?usp=email )

(

5 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: mb/google/geralt: Increase VM18 LDO voltage to 1.9V for Ciri
......................................................................

mb/google/geralt: Increase VM18 LDO voltage to 1.9V for Ciri

The current panel voltage measured at mainboard side is 1.79V and the
voltage at panel side is 1.74V. Since the panel requires 1.8V or more,
increase the circuit voltage to 1.9V to meet the panel requirement.
After adjustment mainboard side voltage is 1.89V and panel side is
1.84V.

BUG=b:322080023
TEST=Check ciri vm18 ldo voltage
BRANCH=None

Change-Id: I6d6193d45409f53c0b656890c44ddaef253c5e01
Signed-off-by: Cong Yang 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80198
Reviewed-by: Ruihai Zhou 
Reviewed-by: Yidi Lin 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/google/geralt/panel_ciri.c
M src/mainboard/google/geralt/regulator.c
2 files changed, 4 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Ruihai Zhou: Looks good to me, but someone else must approve
  Yidi Lin: Looks good to me, approved

diff --git a/src/mainboard/google/geralt/panel_ciri.c b/src/mainboard/google/geralt/panel_ciri.c
index 3d01183..4d31711 100644
--- a/src/mainboard/google/geralt/panel_ciri.c
+++ b/src/mainboard/google/geralt/panel_ciri.c
@@ -2,6 +2,7 @@

#include <console/console.h>
 #include <soc/i2c.h>
+#include <soc/regulator.h>

#include "gpio.h"
 #include "panel.h"
@@ -23,6 +24,7 @@
    	.settings = reg_settings,
    	.setting_counts = ARRAY_SIZE(reg_settings),
    };
+	mainboard_set_regulator_voltage(MTK_REGULATOR_VDD18, 1900000);
    power_on_mipi_panel(&cfg);
 }

diff --git a/src/mainboard/google/geralt/regulator.c b/src/mainboard/google/geralt/regulator.c
index f3b4407..8f0d7cb 100644
--- a/src/mainboard/google/geralt/regulator.c
+++ b/src/mainboard/google/geralt/regulator.c
@@ -38,6 +38,8 @@

if (id == MT6359P_SIM1)
    	mt6359p_set_vsim1_voltage(voltage_uv);
+	else if (id == MT6359P_VM18)
+		mt6359p_set_vm18_voltage(voltage_uv);
    else
    	mt6359p_buck_set_voltage(id, voltage_uv);
 }