embox
brightness_readme
Brightness of imx/LVDS can be adjusted with PWM or GPIO (signal: display data 9)
Right now we have no interface for this in Embox, but in future the following code can be used:
REG32_STORE(0x20e0194, 0x5);
gpio_setup_mode(3, (0x1 << 30), GPIO_MODE_OUTPUT);
gpio_set(3, (0x1 << 30), 1); /* Turn on */
gpio_set(3, (0x1 << 30), 0); /* Turn off */