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backlight: add backlight brightness debug function [2/2]

Browse Source 
PD#SWPL-1005

Problem:
add backlight brightness debug function

Solution:
1,add brightness_level node to change backlight brightness
2,add brightness_bypass node to change brightness_bypass

Verify:
verified by t962x_r311

Change-Id: I8faae0d08b2a15fdc5c5a507c0c6815843be59ab
Signed-off-by: Shaochan Liu <shaochan.liu@amlogic.com>
This commit is contained in:
Shaochan Liu
2018-12-17 20:07:54 +08:00
committed by Dongjin Kim
parent 2e24b4e2e1
commit 445dbd8d19
1 changed files with 77 additions and 21 deletions
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98
drivers/amlogic/media/vout/backlight/aml_bl.c
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@@ -68,8 +68,6 @@ MODULE_PARM_DESC(bl_level, "bl_level");
static unsigned int bl_level_uboot;
static unsigned int brightness_bypass;
module_param(brightness_bypass, uint, 0664);
MODULE_PARM_DESC(brightness_bypass, "bl_brightness_bypass");
static unsigned char bl_pwm_bypass; /* debug flag */
static unsigned char bl_pwm_duty_free; /* debug flag */
@@ -1213,6 +1211,30 @@ static unsigned int aml_bl_get_level(void)
return bl_drv->level;
}
static unsigned int aml_bl_update_brightness_level(unsigned int bl_level)
{
mutex_lock(&bl_level_mutex);
if (bl_level > 255) {
BLPR("0-255 is the valid data\n");
bl_level = 255;
}
if (((bl_drv->state & BL_STATE_LCD_ON) == 0) ||
((bl_drv->state & BL_STATE_BL_POWER_ON) == 0))
bl_level = 0;
if (bl_level == 0) {
if (bl_drv->state & BL_STATE_BL_ON)
bl_power_off();
} else {
aml_bl_set_level(bl_level);
if ((bl_drv->state & BL_STATE_BL_ON) == 0)
bl_power_on();
}
mutex_unlock(&bl_level_mutex);
return 0;
}
static int aml_bl_update_status(struct backlight_device *bd)
{
int brightness = bd->props.brightness;
@@ -1220,30 +1242,12 @@ static int aml_bl_update_status(struct backlight_device *bd)
if (brightness_bypass)
return 0;
mutex_lock(&bl_level_mutex);
if (brightness < 0)
brightness = 0;
else if (brightness > 255)
brightness = 255;
if (((bl_drv->state & BL_STATE_LCD_ON) == 0) ||
((bl_drv->state & BL_STATE_BL_POWER_ON) == 0))
brightness = 0;
aml_bl_update_brightness_level(brightness);
if (bl_debug_print_flag) {
BLPR("%s: %u, real brightness: %u, state: 0x%x\n",
__func__, bd->props.brightness,
brightness, bl_drv->state);
}
if (brightness == 0) {
if (bl_drv->state & BL_STATE_BL_ON)
bl_power_off();
} else {
aml_bl_set_level(brightness);
if ((bl_drv->state & BL_STATE_BL_ON) == 0)
bl_power_on();
}
mutex_unlock(&bl_level_mutex);
return 0;
}
@@ -3124,6 +3128,54 @@ static ssize_t bl_debug_print_store(struct class *class,
return count;
}
static ssize_t bl_debug_brightness_bypass_show(struct class *class,
struct class_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", brightness_bypass);
}
static ssize_t bl_debug_brightness_bypass_store(struct class *class,
struct class_attribute *attr, const char *buf, size_t count)
{
unsigned int ret;
ret = kstrtouint(buf, 10, &brightness_bypass);
if (ret != 0) {
BLERR("invalid data\n");
return -EINVAL;
}
return count;
}
static ssize_t bl_debug_brightness_show(struct class *class,
struct class_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", bl_drv->level);
}
static ssize_t bl_debug_brightness_store(struct class *class,
struct class_attribute *attr, const char *buf, size_t count)
{
unsigned int ret;
unsigned int brightness_level = 0;
ret = kstrtouint(buf, 10, &brightness_level);
if (ret != 0) {
BLERR("invalid data\n");
return -EINVAL;
}
if (!brightness_bypass)
brightness_bypass = 1;
ret = aml_bl_update_brightness_level(brightness_level);
if (ret == 0)
BLPR("brightness %d update ok\n", brightness_level);
else
BLERR("update fail\n");
return count;
}
static struct class_attribute bl_debug_class_attrs[] = {
__ATTR(help, 0444, bl_debug_help, NULL),
__ATTR(status, 0444, bl_status_read, NULL),
@@ -3134,6 +3186,10 @@ static struct class_attribute bl_debug_class_attrs[] = {
__ATTR(key_valid, 0444, bl_debug_key_valid_show, NULL),
__ATTR(config_load, 0444, bl_debug_config_load_show, NULL),
__ATTR(print, 0644, bl_debug_print_show, bl_debug_print_store),
__ATTR(brightness_bypass, 0644, bl_debug_brightness_bypass_show,
bl_debug_brightness_bypass_store),
__ATTR(brightness_level, 0644, bl_debug_brightness_show,
bl_debug_brightness_store),
};
static int aml_bl_creat_class(void)