From e98696cea7e289447a5d2328546b947629301616 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 21 Mar 2025 10:54:00 +0100 Subject: [PATCH] backlight: lcd: Move event handling into helpers Move the handling of display updates to separate helper functions. There is code for handling fbdev blank events and fbdev mode changes. The code currently runs from fbdev event notifiers, which will be replaced. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Acked-by: Simona Vetter Link: https://lore.kernel.org/r/20250321095517.313713-8-tzimmermann@suse.de Signed-off-by: Lee Jones --- drivers/video/backlight/lcd.c | 38 ++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 10 deletions(-) diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c index 3267acf8dc5b1..f57ff8bcc2fa5 100644 --- a/drivers/video/backlight/lcd.c +++ b/drivers/video/backlight/lcd.c @@ -18,6 +18,32 @@ #include #include +static void lcd_notify_blank(struct lcd_device *ld, struct device *display_dev, + int power) +{ + guard(mutex)(&ld->ops_lock); + + if (!ld->ops || !ld->ops->set_power) + return; + if (ld->ops->controls_device && !ld->ops->controls_device(ld, display_dev)) + return; + + ld->ops->set_power(ld, power); +} + +static void lcd_notify_mode_change(struct lcd_device *ld, struct device *display_dev, + unsigned int width, unsigned int height) +{ + guard(mutex)(&ld->ops_lock); + + if (!ld->ops || !ld->ops->set_mode) + return; + if (ld->ops->controls_device && !ld->ops->controls_device(ld, display_dev)) + return; + + ld->ops->set_mode(ld, width, height); +} + #if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \ defined(CONFIG_LCD_CLASS_DEVICE_MODULE)) static int to_lcd_power(int fb_blank) @@ -50,25 +76,17 @@ static int fb_notifier_callback(struct notifier_block *self, struct fb_info *info = evdata->info; struct lcd_device *fb_lcd = fb_lcd_device(info); - guard(mutex)(&ld->ops_lock); - - if (!ld->ops) - return 0; - if (ld->ops->controls_device && !ld->ops->controls_device(ld, info->device)) - return 0; if (fb_lcd && fb_lcd != ld) return 0; if (event == FB_EVENT_BLANK) { int power = to_lcd_power(*(int *)evdata->data); - if (ld->ops->set_power) - ld->ops->set_power(ld, power); + lcd_notify_blank(ld, info->device, power); } else { const struct fb_videomode *videomode = evdata->data; - if (ld->ops->set_mode) - ld->ops->set_mode(ld, videomode->xres, videomode->yres); + lcd_notify_mode_change(ld, info->device, videomode->xres, videomode->yres); } return 0; -- 2.50.1