From 571fede27a127398697e783a06a833e37b5b58c3 Mon Sep 17 00:00:00 2001
From: huangcm <1263938474@qq.com>
Date: Thu, 03 Jul 2025 01:22:12 +0000
Subject: [PATCH] feat(lcd): add lcd_pwm_max_limit
---
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/de/disp_lcd.c | 15 ++++++++++++---
1 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/de/disp_lcd.c b/longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/de/disp_lcd.c
index acb75fb..c07980d 100755
--- a/longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/de/disp_lcd.c
+++ b/longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/de/disp_lcd.c
@@ -15,6 +15,7 @@
*
*/
#include "disp_lcd.h"
+#include <linux/delay.h>
struct disp_lcd_private_data
{
@@ -754,6 +755,14 @@
ret = disp_sys_script_get_item(primary_key, sub_name, (int *)lcd_cfg->lcd_pin_power[i], 2);
}
+ sprintf(sub_name, "lcd_pwm_max_limit");
+ ret = disp_sys_script_get_item(primary_key, sub_name, &value, 1);
+ if (ret == 1) {
+ lcd_cfg->lcd_pwm_max_limit = value;
+ } else {
+ lcd_cfg->lcd_pwm_max_limit = 255;
+ }
+
#ifdef __LINUX_PLAT__
//backlight adjust
for (i = 0; i < 101; i++) {
@@ -761,12 +770,12 @@
lcd_cfg->backlight_curve_adjust[i] = 0;
if (i == 100)
- lcd_cfg->backlight_curve_adjust[i] = 255;
+ lcd_cfg->backlight_curve_adjust[i] = lcd_cfg->lcd_pwm_max_limit;
ret = disp_sys_script_get_item(primary_key, sub_name, &value, 1);
if (ret == 1) {
value = (value > 100)? 100:value;
- value = value * 255 / 100;
+ value = value * lcd_cfg->lcd_pwm_max_limit / 100;
lcd_cfg->backlight_curve_adjust[i] = value;
}
}
@@ -774,7 +783,7 @@
sprintf(sub_name, "lcd_backlight");
ret = disp_sys_script_get_item(primary_key, sub_name, &value, 1);
if (ret == 1) {
- value = (value > 256)? 256:value;
+ value = (value > lcd_cfg->lcd_pwm_max_limit)? lcd_cfg->lcd_pwm_max_limit:value;
lcd_cfg->backlight_bright = value;
} else {
lcd_cfg->backlight_bright = 197;
--
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