Merge tag 'backlight-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

Pull backlight updates from Lee Jones:

 - Improve handling of LCD power states and interactions with the fbdev
   subsystem

 - Introduce new LCD_POWER_ constants to decouple the LCD subsystem from
   fbdev

 - Update several drivers to use the new LCD_POWER_ constants

 - Clarify the semantics of the lcd_ops.controls_device callback

 - Remove unnecessary includes and dependencies

 - Remove unused notifier functionality

 - Simplify code with scoped for-each loops

 - Fix module autoloading for the ktz8866 driver

 - Update device tree bindings to yaml format

 - Minor cleanups and improvements in various drivers

* tag 'backlight-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: (33 commits)
  MAINTAINERS: Use Daniel Thompson's korg address for Backlight work
  dt-bindings: backlight: Convert zii,rave-sp-backlight.txt to yaml
  backlight: Remove notifier
  backlight: ktz8866: Fix module autoloading
  backlight: 88pm860x_bl: Simplify with scoped for each OF child loop
  backlight: lcd: Do not include <linux/fb.h> in lcd header
  backlight: lcd: Remove struct fb_videomode from set_mode callback
  backlight: lcd: Replace check_fb with controls_device
  HID: picoLCD: Replace check_fb in favor of struct fb_info.lcd_dev
  fbdev: omap: Use lcd power constants
  fbdev: imxfb: Use lcd power constants
  fbdev: imxfb: Replace check_fb in favor of struct fb_info.lcd_dev
  fbdev: clps711x-fb: Use lcd power constants
  fbdev: clps711x-fb: Replace check_fb in favor of struct fb_info.lcd_dev
  backlight: tdo24m: Use lcd power constants
  backlight: platform_lcd: Use lcd power constants
  backlight: platform_lcd: Remove match_fb from struct plat_lcd_data
  backlight: platform_lcd: Remove include statement for <linux/backlight.h>
  backlight: otm3225a: Use lcd power constants
  backlight: ltv350qv: Use lcd power constants
  ...

Author: torvalds

Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.txt

@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/zii,rave-sp-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Zodiac Inflight Innovations RAVE Supervisory Processor Backlight
+
+maintainers:
+  - Frank Li <Frank.Li@nxp.com>
+
+description:
+  RAVE SP backlight device is a "MFD cell" device corresponding to
+  backlight functionality of RAVE Supervisory Processor. It is expected
+  that its Device Tree node is specified as a child of the node
+  corresponding to the parent RAVE SP device (as documented in
+  Documentation/devicetree/bindings/mfd/zii,rave-sp.yaml)
+
+properties:
+  compatible:
+    const: zii,rave-sp-backlight
+
+required:
+  - compatible
+
+allOf:
+  - $ref: common.yaml
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    backlight {
+        compatible = "zii,rave-sp-backlight";
+    };
+

Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.yaml

@@ -3812,7 +3812,7 @@ F:	drivers/net/wireless/broadcom/b43legacy/
 
 BACKLIGHT CLASS/SUBSYSTEM
 M:	Lee Jones <lee@kernel.org>
-M:	Daniel Thompson <daniel.thompson@linaro.org>
+M:	Daniel Thompson <danielt@kernel.org>
 M:	Jingoo Han <jingoohan1@gmail.com>
 L:	dri-devel@lists.freedesktop.org
 S:	Maintained

MAINTAINERS

@@ -497,6 +497,10 @@ int picolcd_init_framebuffer(struct picolcd_data *data)
 #endif
 #endif
 
+#ifdef CONFIG_HID_PICOLCD_LCD
+	info->lcd_dev = data->lcd;
+#endif
+
 	fbdata = info->par;
 	spin_lock_init(&fbdata->lock);
 	fbdata->picolcd = data;

drivers/hid/hid-picolcd_fb.c

@@ -41,15 +41,9 @@ static int picolcd_set_contrast(struct lcd_device *ldev, int contrast)
 	return 0;
 }
 
-static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb)
-{
-	return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev));
-}
-
 static const struct lcd_ops picolcd_lcdops = {
 	.get_contrast   = picolcd_get_contrast,
 	.set_contrast   = picolcd_set_contrast,
-	.check_fb       = picolcd_check_lcd_fb,
 };
 
 int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report)

drivers/hid/hid-picolcd_lcd.c

@@ -151,22 +151,21 @@ static int pm860x_backlight_dt_init(struct platform_device *pdev,
 				    struct pm860x_backlight_data *data,
 				    char *name)
 {
-	struct device_node *nproot, *np;
+	struct device_node *nproot;
 	int iset = 0;
 
 	nproot = of_get_child_by_name(pdev->dev.parent->of_node, "backlights");
 	if (!nproot) {
 		dev_err(&pdev->dev, "failed to find backlights node\n");
 		return -ENODEV;
 	}
-	for_each_child_of_node(nproot, np) {
+	for_each_child_of_node_scoped(nproot, np) {
 		if (of_node_name_eq(np, name)) {
 			of_property_read_u32(np, "marvell,88pm860x-iset",
 					     &iset);
 			data->iset = PM8606_WLED_CURRENT(iset);
 			of_property_read_u32(np, "marvell,88pm860x-pwm",
 					     &data->pwm);
-			of_node_put(np);
 			break;
 		}
 	}

drivers/video/backlight/88pm860x_bl.c

@@ -65,7 +65,6 @@
 
 static struct list_head backlight_dev_list;
 static struct mutex backlight_dev_list_mutex;
-static struct blocking_notifier_head backlight_notifier;
 
 static const char *const backlight_types[] = {
 	[BACKLIGHT_RAW] = "raw",
@@ -467,9 +466,6 @@ struct backlight_device *backlight_device_register(const char *name,
 	list_add(&new_bd->entry, &backlight_dev_list);
 	mutex_unlock(&backlight_dev_list_mutex);
 
-	blocking_notifier_call_chain(&backlight_notifier,
-				     BACKLIGHT_REGISTERED, new_bd);
-
 	return new_bd;
 }
 EXPORT_SYMBOL(backlight_device_register);
@@ -539,9 +535,6 @@ void backlight_device_unregister(struct backlight_device *bd)
 	mutex_unlock(&pmac_backlight_mutex);
 #endif
 
-	blocking_notifier_call_chain(&backlight_notifier,
-				     BACKLIGHT_UNREGISTERED, bd);
-
 	mutex_lock(&bd->ops_lock);
 	bd->ops = NULL;
 	mutex_unlock(&bd->ops_lock);
@@ -566,40 +559,6 @@ static int devm_backlight_device_match(struct device *dev, void *res,
 	return *r == data;
 }
 
-/**
- * backlight_register_notifier - get notified of backlight (un)registration
- * @nb: notifier block with the notifier to call on backlight (un)registration
- *
- * Register a notifier to get notified when backlight devices get registered
- * or unregistered.
- *
- * RETURNS:
- *
- * 0 on success, otherwise a negative error code
- */
-int backlight_register_notifier(struct notifier_block *nb)
-{
-	return blocking_notifier_chain_register(&backlight_notifier, nb);
-}
-EXPORT_SYMBOL(backlight_register_notifier);
-
-/**
- * backlight_unregister_notifier - unregister a backlight notifier
- * @nb: notifier block to unregister
- *
- * Register a notifier to get notified when backlight devices get registered
- * or unregistered.
- *
- * RETURNS:
- *
- * 0 on success, otherwise a negative error code
- */
-int backlight_unregister_notifier(struct notifier_block *nb)
-{
-	return blocking_notifier_chain_unregister(&backlight_notifier, nb);
-}
-EXPORT_SYMBOL(backlight_unregister_notifier);
-
 /**
  * devm_backlight_device_register - register a new backlight device
  * @dev: the device to register
@@ -767,7 +726,6 @@ static int __init backlight_class_init(void)
 
 	INIT_LIST_HEAD(&backlight_dev_list);
 	mutex_init(&backlight_dev_list_mutex);
-	BLOCKING_INIT_NOTIFIER_HEAD(&backlight_notifier);
 
 	return 0;
 }

drivers/video/backlight/backlight.c

@@ -17,14 +17,13 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
-#include <linux/fb.h>
 #include <linux/lcd.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/corgi_lcd.h>
 #include <linux/slab.h>
 #include <asm/mach/sharpsl_param.h>
 
-#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
+#define POWER_IS_ON(pwr)	((pwr) <= LCD_POWER_REDUCED)
 
 /* Register Addresses */
 #define RESCTL_ADRS     0x00
@@ -332,12 +331,12 @@ static void corgi_lcd_power_off(struct corgi_lcd *lcd)
 			POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
 }
 
-static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m)
+static int corgi_lcd_set_mode(struct lcd_device *ld, u32 xres, u32 yres)
 {
 	struct corgi_lcd *lcd = lcd_get_data(ld);
 	int mode = CORGI_LCD_MODE_QVGA;
 
-	if (m->xres == 640 || m->xres == 480)
+	if (xres == 640 || xres == 480)
 		mode = CORGI_LCD_MODE_VGA;
 
 	if (lcd->mode == mode)
@@ -455,7 +454,7 @@ static int corgi_lcd_suspend(struct device *dev)
 
 	corgibl_flags |= CORGIBL_SUSPENDED;
 	corgi_bl_set_intensity(lcd, 0);
-	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
+	corgi_lcd_set_power(lcd->lcd_dev, LCD_POWER_OFF);
 	return 0;
 }
 
@@ -464,7 +463,7 @@ static int corgi_lcd_resume(struct device *dev)
 	struct corgi_lcd *lcd = dev_get_drvdata(dev);
 
 	corgibl_flags &= ~CORGIBL_SUSPENDED;
-	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
+	corgi_lcd_set_power(lcd->lcd_dev, LCD_POWER_ON);
 	backlight_update_status(lcd->bl_dev);
 	return 0;
 }
@@ -513,7 +512,7 @@ static int corgi_lcd_probe(struct spi_device *spi)
 	if (IS_ERR(lcd->lcd_dev))
 		return PTR_ERR(lcd->lcd_dev);
 
-	lcd->power = FB_BLANK_POWERDOWN;
+	lcd->power = LCD_POWER_OFF;
 	lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;
 
 	memset(&props, 0, sizeof(struct backlight_properties));
@@ -535,7 +534,7 @@ static int corgi_lcd_probe(struct spi_device *spi)
 	lcd->kick_battery = pdata->kick_battery;
 
 	spi_set_drvdata(spi, lcd);
-	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
+	corgi_lcd_set_power(lcd->lcd_dev, LCD_POWER_ON);
 	backlight_update_status(lcd->bl_dev);
 
 	lcd->limit_mask = pdata->limit_mask;
@@ -550,7 +549,7 @@ static void corgi_lcd_remove(struct spi_device *spi)
 	lcd->bl_dev->props.power = BACKLIGHT_POWER_ON;
 	lcd->bl_dev->props.brightness = 0;
 	backlight_update_status(lcd->bl_dev);
-	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
+	corgi_lcd_set_power(lcd->lcd_dev, LCD_POWER_OFF);
 }
 
 static struct spi_driver corgi_lcd_driver = {

drivers/video/backlight/corgi_lcd.c

@@ -532,7 +532,7 @@ static int hx8369_lcd_init(struct lcd_device *lcdev)
 	return 0;
 }
 
-#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
+#define POWER_IS_ON(pwr)	((pwr) <= LCD_POWER_REDUCED)
 
 static int hx8357_set_power(struct lcd_device *lcdev, int power)
 {

drivers/video/backlight/hx8357.c

@@ -8,7 +8,6 @@
  * memory is cyclically updated over the RGB interface.
  */
 
-#include <linux/fb.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
 #include <linux/init.h>
@@ -119,7 +118,7 @@
 
 #define CMD_BUFSIZE		16
 
-#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
+#define POWER_IS_ON(pwr)	((pwr) <= LCD_POWER_REDUCED)
 
 #define set_tx_byte(b)		(tx_invert ? ~(b) : b)
 
@@ -513,7 +512,7 @@ static int ili922x_probe(struct spi_device *spi)
 
 	ili922x_display_init(spi);
 
-	ili->power = FB_BLANK_POWERDOWN;
+	ili->power = LCD_POWER_OFF;
 
 	lcd = devm_lcd_device_register(&spi->dev, "ili922xlcd", &spi->dev, ili,
 					&ili922x_ops);
@@ -525,7 +524,7 @@ static int ili922x_probe(struct spi_device *spi)
 	ili->ld = lcd;
 	spi_set_drvdata(spi, ili);
 
-	ili922x_lcd_power(ili, FB_BLANK_UNBLANK);
+	ili922x_lcd_power(ili, LCD_POWER_ON);
 
 	return 0;
 }