static int hva40wv1_display_init(struct hva40wv1_lcd *lcd)
{
struct mcde_display_device *ddev = lcd->ddev;
int ret = 0;
dev_dbg(lcd->dev, "%s: Initialise display\n", __func__);
/* Turn off backlight until display is initialised */
if (lcd->pd->bl_on_off)
lcd->pd->bl_on_off(false);
lcd->turn_on_backlight = false;
ret |= hva40wv1_dsi_read_panel_id(lcd);
ret |= hva40wv1_dsi_dcs_write_sequence(ddev, DCS_CMD_SEQ_PWR_ON_INIT);
if (lcd->pd->bl_ctrl)
ret |= hva40wv1_update_brightness(ddev, lcd->current_brightness);
return 0; /* assume OK in case of manufacturing test */
}
static int hva40wv1_set_brightness(struct backlight_device *bd)
{
int ret = 0;
int brightness = bd->props.brightness;
struct hva40wv1_lcd *lcd = bl_get_data(bd);
dev_dbg(&bd->dev, "lcd set brightness called with %d\n", brightness);
if ((brightness < 0) || (brightness > bd->props.max_brightness)) {
dev_err(&bd->dev, "lcd brightness should be 0 to %d.\n",
bd->props.max_brightness);
return -EINVAL;
}
mutex_lock(&lcd->lock);
if (lcd->ddev->power_mode != MCDE_DISPLAY_PM_OFF) {
ret = hva40wv1_update_brightness(lcd->ddev, brightness);
if (ret) {
dev_err(&bd->dev, "lcd brightness setting failed.\n");
return -EIO;
}
if (lcd->pd->bl_en_gpio != -1)
gpio_set_value(lcd->pd->bl_en_gpio, 1);
} else if (lcd->pd->bl_en_gpio != -1) {
gpio_set_value(lcd->pd->bl_en_gpio, 0);
}
lcd->current_brightness = brightness;
mutex_unlock(&lcd->lock);
return ret;
}
