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/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/disp_lcd.c | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/disp_lcd.c b/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/disp_lcd.c
index ec4b3fb..fcf5e6b 100644
--- a/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/disp_lcd.c
+++ b/longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/de/disp_lcd.c
@@ -456,19 +456,27 @@
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;
+ }
+
/* backlight adjust */
for (i = 0; i < 101; i++) {
sprintf(sub_name, "lcd_bl_%d_percent", i);
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;
}
}
@@ -476,7 +484,7 @@
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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