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

Browse Source 
- Introduced new LCD_POWER_ constants to decouple the LCD subsystem from fbdev.
 - Several drivers were updated to use the new LCD_POWER_ constants.
 - Clarified the semantics of the lcd_ops.controls_device callback.
 - Removed unnecessary includes and dependencies.
 - Removed unused notifier functionality.
 - Simplified code with scoped for-each loops.
 - Fixed module autoloading for the ktz8866 driver.
 - Updated device tree bindings to yaml format.
 - Minor cleanups and improvements in various drivers.
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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
  ...
This commit is contained in:
Linus Torvalds 2024-11-22 16:29:57 -08:00
commit 2fb7eb3d7e
28 changed files with 221 additions and 247 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.txt
View File

@ -1,23 +0,0 @@
Zodiac Inflight Innovations RAVE Supervisory Processor Backlight Bindings
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.txt)
Required properties:
- compatible: Should be "zii,rave-sp-backlight"
Example:
rave-sp {
compatible = "zii,rave-sp-rdu1";
current-speed = <38400>;
backlight {
compatible = "zii,rave-sp-backlight";
};
}

36
Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.yaml Normal file
View File

@ -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";
};

2
MAINTAINERS
View File

@ -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

4
drivers/hid/hid-picolcd_fb.c
View File

@ -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;

6
drivers/hid/hid-picolcd_lcd.c
View File

@ -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)

5
drivers/video/backlight/88pm860x_bl.c
View File

@ -151,7 +151,7 @@ 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");
@ -159,14 +159,13 @@ static int pm860x_backlight_dt_init(struct platform_device *pdev,
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;
}
}

42
drivers/video/backlight/backlight.c
View File

@ -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;
}

17
drivers/video/backlight/corgi_lcd.c
View File

@ -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 = {

2
drivers/video/backlight/hx8357.c
View File

@ -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)
{

7
drivers/video/backlight/ili922x.c
View File

@ -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;
}

15
drivers/video/backlight/ili9320.c
View File

@ -10,7 +10,6 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/lcd.h>
#include <linux/module.h>
@ -121,7 +120,7 @@ static inline int ili9320_power_off(struct ili9320 *lcd)
return 0;
}
#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
#define POWER_IS_ON(pwr) ((pwr) <= LCD_POWER_REDUCED)
static int ili9320_power(struct ili9320 *lcd, int power)
{
@ -223,7 +222,7 @@ int ili9320_probe_spi(struct spi_device *spi,
ili->dev = dev;
ili->client = client;
ili->power = FB_BLANK_POWERDOWN;
ili->power = LCD_POWER_OFF;
ili->platdata = cfg;
spi_set_drvdata(spi, ili);
@ -241,7 +240,7 @@ int ili9320_probe_spi(struct spi_device *spi,
dev_info(dev, "initialising %s\n", client->name);
ret = ili9320_power(ili, FB_BLANK_UNBLANK);
ret = ili9320_power(ili, LCD_POWER_ON);
if (ret != 0) {
dev_err(dev, "failed to set lcd power state\n");
return ret;
@ -253,7 +252,7 @@ EXPORT_SYMBOL_GPL(ili9320_probe_spi);
void ili9320_remove(struct ili9320 *ili)
{
ili9320_power(ili, FB_BLANK_POWERDOWN);
ili9320_power(ili, LCD_POWER_OFF);
}
EXPORT_SYMBOL_GPL(ili9320_remove);
@ -262,7 +261,7 @@ int ili9320_suspend(struct ili9320 *lcd)
{
int ret;
ret = ili9320_power(lcd, FB_BLANK_POWERDOWN);
ret = ili9320_power(lcd, LCD_POWER_OFF);
if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |
@ -282,7 +281,7 @@ int ili9320_resume(struct ili9320 *lcd)
if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP)
ili9320_write(lcd, ILI9320_POWER1, 0x00);
return ili9320_power(lcd, FB_BLANK_UNBLANK);
return ili9320_power(lcd, LCD_POWER_ON);
}
EXPORT_SYMBOL_GPL(ili9320_resume);
#endif
@ -290,7 +289,7 @@ EXPORT_SYMBOL_GPL(ili9320_resume);
/* Power down all displays on reboot, poweroff or halt */
void ili9320_shutdown(struct ili9320 *lcd)
{
ili9320_power(lcd, FB_BLANK_POWERDOWN);
ili9320_power(lcd, LCD_POWER_OFF);
}
EXPORT_SYMBOL_GPL(ili9320_shutdown);

10
drivers/video/backlight/jornada720_lcd.c
View File

@ -6,7 +6,7 @@
*/
#include <linux/device.h>
#include <linux/fb.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/lcd.h>
#include <linux/module.h>
@ -23,14 +23,14 @@
static int jornada_lcd_get_power(struct lcd_device *ld)
{
return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
return PPSR & PPC_LDD2 ? LCD_POWER_ON : LCD_POWER_OFF;
}
static int jornada_lcd_get_contrast(struct lcd_device *ld)
{
int ret;
if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
if (jornada_lcd_get_power(ld) != LCD_POWER_ON)
return 0;
jornada_ssp_start();
@ -71,7 +71,7 @@ static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
static int jornada_lcd_set_power(struct lcd_device *ld, int power)
{
if (power != FB_BLANK_UNBLANK) {
if (power != LCD_POWER_ON) {
PPSR &= ~PPC_LDD2;
PPDR |= PPC_LDD2;
} else {
@ -106,7 +106,7 @@ static int jornada_lcd_probe(struct platform_device *pdev)
/* lets set our default values */
jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
jornada_lcd_set_power(lcd_device, LCD_POWER_ON);
/* give it some time to startup */
msleep(100);

1
drivers/video/backlight/ktz8866.c
View File

@ -190,6 +190,7 @@ static const struct of_device_id ktz8866_match_table[] = {
},
{},
};
MODULE_DEVICE_TABLE(of, ktz8866_match_table);
static struct i2c_driver ktz8866_driver = {
.driver = {

32
drivers/video/backlight/l4f00242t03.c
View File

@ -112,40 +112,40 @@ static int l4f00242t03_lcd_power_set(struct lcd_device *ld, int power)
const u16 slpin = 0x10;
const u16 disoff = 0x28;
if (power <= FB_BLANK_NORMAL) {
if (priv->lcd_state <= FB_BLANK_NORMAL) {
if (power <= LCD_POWER_REDUCED) {
if (priv->lcd_state <= LCD_POWER_REDUCED) {
/* Do nothing, the LCD is running */
} else if (priv->lcd_state < FB_BLANK_POWERDOWN) {
} else if (priv->lcd_state < LCD_POWER_OFF) {
dev_dbg(&spi->dev, "Resuming LCD\n");
spi_write(spi, (const u8 *)&slpout, sizeof(u16));
msleep(60);
spi_write(spi, (const u8 *)&dison, sizeof(u16));
} else {
/* priv->lcd_state == FB_BLANK_POWERDOWN */
/* priv->lcd_state == LCD_POWER_OFF */
l4f00242t03_lcd_init(spi);
priv->lcd_state = FB_BLANK_VSYNC_SUSPEND;
priv->lcd_state = LCD_POWER_REDUCED_VSYNC_SUSPEND;
l4f00242t03_lcd_power_set(priv->ld, power);
}
} else if (power < FB_BLANK_POWERDOWN) {
if (priv->lcd_state <= FB_BLANK_NORMAL) {
} else if (power < LCD_POWER_OFF) {
if (priv->lcd_state <= LCD_POWER_REDUCED) {
/* Send the display in standby */
dev_dbg(&spi->dev, "Standby the LCD\n");
spi_write(spi, (const u8 *)&disoff, sizeof(u16));
msleep(60);
spi_write(spi, (const u8 *)&slpin, sizeof(u16));
} else if (priv->lcd_state < FB_BLANK_POWERDOWN) {
} else if (priv->lcd_state < LCD_POWER_OFF) {
/* Do nothing, the LCD is already in standby */
} else {
/* priv->lcd_state == FB_BLANK_POWERDOWN */
/* priv->lcd_state == LCD_POWER_OFF */
l4f00242t03_lcd_init(spi);
priv->lcd_state = FB_BLANK_UNBLANK;
priv->lcd_state = LCD_POWER_ON;
l4f00242t03_lcd_power_set(ld, power);
}
} else {
/* power == FB_BLANK_POWERDOWN */
if (priv->lcd_state != FB_BLANK_POWERDOWN) {
/* power == LCD_POWER_OFF */
if (priv->lcd_state != LCD_POWER_OFF) {
/* Clear the screen before shutting down */
spi_write(spi, (const u8 *)&disoff, sizeof(u16));
msleep(60);
@ -212,8 +212,8 @@ static int l4f00242t03_probe(struct spi_device *spi)
/* Init the LCD */
l4f00242t03_lcd_init(spi);
priv->lcd_state = FB_BLANK_VSYNC_SUSPEND;
l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_UNBLANK);
priv->lcd_state = LCD_POWER_REDUCED_VSYNC_SUSPEND;
l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_ON);
dev_info(&spi->dev, "Epson l4f00242t03 lcd probed.\n");
@ -224,7 +224,7 @@ static void l4f00242t03_remove(struct spi_device *spi)
{
struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN);
l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_OFF);
}
static void l4f00242t03_shutdown(struct spi_device *spi)
@ -232,7 +232,7 @@ static void l4f00242t03_shutdown(struct spi_device *spi)
struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
if (priv)
l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN);
l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_OFF);
}

50
drivers/video/backlight/lcd.c
View File

@ -20,6 +20,24 @@
#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \
defined(CONFIG_LCD_CLASS_DEVICE_MODULE))
static int to_lcd_power(int fb_blank)
{
switch (fb_blank) {
case FB_BLANK_UNBLANK:
return LCD_POWER_ON;
/* deprecated; TODO: should become 'off' */
case FB_BLANK_NORMAL:
return LCD_POWER_REDUCED;
case FB_BLANK_VSYNC_SUSPEND:
return LCD_POWER_REDUCED_VSYNC_SUSPEND;
/* 'off' */
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_POWERDOWN:
default:
return LCD_POWER_OFF;
}
}
/* This callback gets called when something important happens inside a
* framebuffer driver. We're looking if that important event is blanking,
* and if it is, we're switching lcd power as well ...
@ -27,24 +45,32 @@
static int fb_notifier_callback(struct notifier_block *self,
unsigned long event, void *data)
{
struct lcd_device *ld;
struct lcd_device *ld = container_of(self, struct lcd_device, fb_notif);
struct fb_event *evdata = data;
struct fb_info *info = evdata->info;
struct lcd_device *fb_lcd = fb_lcd_device(info);
guard(mutex)(&ld->ops_lock);
ld = container_of(self, struct lcd_device, fb_notif);
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;
mutex_lock(&ld->ops_lock);
if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) {
if (event == FB_EVENT_BLANK) {
if (ld->ops->set_power)
ld->ops->set_power(ld, *(int *)evdata->data);
} else {
if (ld->ops->set_mode)
ld->ops->set_mode(ld, evdata->data);
}
if (event == FB_EVENT_BLANK) {
int power = to_lcd_power(*(int *)evdata->data);
if (ld->ops->set_power)
ld->ops->set_power(ld, power);
} else {
const struct fb_videomode *videomode = evdata->data;
if (ld->ops->set_mode)
ld->ops->set_mode(ld, videomode->xres, videomode->yres);
}
mutex_unlock(&ld->ops_lock);
return 0;
}

2
drivers/video/backlight/lms283gf05.c
View File

@ -126,7 +126,7 @@ static int lms283gf05_power_set(struct lcd_device *ld, int power)
struct lms283gf05_state *st = lcd_get_data(ld);
struct spi_device *spi = st->spi;
if (power <= FB_BLANK_NORMAL) {
if (power <= LCD_POWER_REDUCED) {
if (st->reset)
lms283gf05_reset(st->reset);
lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));

24
drivers/video/backlight/lms501kf03.c
View File

@ -6,9 +6,7 @@
* Author: Jingoo Han <jg1.han@samsung.com>
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/lcd.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
@ -206,7 +204,7 @@ static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)
static int lms501kf03_power_is_on(int power)
{
return (power) <= FB_BLANK_NORMAL;
return (power) <= LCD_POWER_REDUCED;
}
static int lms501kf03_power_on(struct lms501kf03 *lcd)
@ -295,8 +293,8 @@ static int lms501kf03_set_power(struct lcd_device *ld, int power)
{
struct lms501kf03 *lcd = lcd_get_data(ld);
if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
power != FB_BLANK_NORMAL) {
if (power != LCD_POWER_ON && power != LCD_POWER_OFF &&
power != LCD_POWER_REDUCED) {
dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
return -EINVAL;
}
@ -350,11 +348,11 @@ static int lms501kf03_probe(struct spi_device *spi)
* current lcd status is powerdown and then
* it enables lcd panel.
*/
lcd->power = FB_BLANK_POWERDOWN;
lcd->power = LCD_POWER_OFF;
lms501kf03_power(lcd, FB_BLANK_UNBLANK);
lms501kf03_power(lcd, LCD_POWER_ON);
} else {
lcd->power = FB_BLANK_UNBLANK;
lcd->power = LCD_POWER_ON;
}
spi_set_drvdata(spi, lcd);
@ -368,7 +366,7 @@ static void lms501kf03_remove(struct spi_device *spi)
{
struct lms501kf03 *lcd = spi_get_drvdata(spi);
lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
lms501kf03_power(lcd, LCD_POWER_OFF);
}
#ifdef CONFIG_PM_SLEEP
@ -382,16 +380,16 @@ static int lms501kf03_suspend(struct device *dev)
* when lcd panel is suspend, lcd panel becomes off
* regardless of status.
*/
return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
return lms501kf03_power(lcd, LCD_POWER_OFF);
}
static int lms501kf03_resume(struct device *dev)
{
struct lms501kf03 *lcd = dev_get_drvdata(dev);
lcd->power = FB_BLANK_POWERDOWN;
lcd->power = LCD_POWER_OFF;
return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
return lms501kf03_power(lcd, LCD_POWER_ON);
}
#endif
@ -402,7 +400,7 @@ static void lms501kf03_shutdown(struct spi_device *spi)
{
struct lms501kf03 *lcd = spi_get_drvdata(spi);
lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
lms501kf03_power(lcd, LCD_POWER_OFF);
}
static struct spi_driver lms501kf03_driver = {

15
drivers/video/backlight/ltv350qv.c
View File

@ -6,7 +6,6 @@
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/lcd.h>
#include <linux/module.h>
@ -15,7 +14,7 @@
#include "ltv350qv.h"
#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
#define POWER_IS_ON(pwr) ((pwr) <= LCD_POWER_REDUCED)
struct ltv350qv {
struct spi_device *spi;
@ -233,7 +232,7 @@ static int ltv350qv_probe(struct spi_device *spi)
return -ENOMEM;
lcd->spi = spi;
lcd->power = FB_BLANK_POWERDOWN;
lcd->power = LCD_POWER_OFF;
lcd->buffer = devm_kzalloc(&spi->dev, 8, GFP_KERNEL);
if (!lcd->buffer)
return -ENOMEM;
@ -245,7 +244,7 @@ static int ltv350qv_probe(struct spi_device *spi)
lcd->ld = ld;
ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK);
ret = ltv350qv_power(lcd, LCD_POWER_ON);
if (ret)
return ret;
@ -258,7 +257,7 @@ static void ltv350qv_remove(struct spi_device *spi)
{
struct ltv350qv *lcd = spi_get_drvdata(spi);
ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
ltv350qv_power(lcd, LCD_POWER_OFF);
}
#ifdef CONFIG_PM_SLEEP
@ -266,14 +265,14 @@ static int ltv350qv_suspend(struct device *dev)
{
struct ltv350qv *lcd = dev_get_drvdata(dev);
return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
return ltv350qv_power(lcd, LCD_POWER_OFF);
}
static int ltv350qv_resume(struct device *dev)
{
struct ltv350qv *lcd = dev_get_drvdata(dev);
return ltv350qv_power(lcd, FB_BLANK_UNBLANK);
return ltv350qv_power(lcd, LCD_POWER_ON);
}
#endif
@ -284,7 +283,7 @@ static void ltv350qv_shutdown(struct spi_device *spi)
{
struct ltv350qv *lcd = spi_get_drvdata(spi);
ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
ltv350qv_power(lcd, LCD_POWER_OFF);
}
static struct spi_driver ltv350qv_driver = {

2
drivers/video/backlight/otm3225a.c
View File

@ -189,7 +189,7 @@ static int otm3225a_set_power(struct lcd_device *ld, int power)
if (power == dd->power)
return 0;
if (power > FB_BLANK_UNBLANK)
if (power > LCD_POWER_ON)
otm3225a_write(dd->spi, display_off, ARRAY_SIZE(display_off));
else
otm3225a_write(dd->spi, display_on, ARRAY_SIZE(display_on));

20
drivers/video/backlight/platform_lcd.c
View File

@ -9,8 +9,6 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/lcd.h>
#include <linux/slab.h>
@ -42,7 +40,7 @@ static int platform_lcd_set_power(struct lcd_device *lcd, int power)
struct platform_lcd *plcd = to_our_lcd(lcd);
int lcd_power = 1;
if (power == FB_BLANK_POWERDOWN || plcd->suspended)
if (power == LCD_POWER_OFF || plcd->suspended)
lcd_power = 0;
plcd->pdata->set_power(plcd->pdata, lcd_power);
@ -51,21 +49,17 @@ static int platform_lcd_set_power(struct lcd_device *lcd, int power)
return 0;
}
static int platform_lcd_match(struct lcd_device *lcd, struct fb_info *info)
static bool platform_lcd_controls_device(struct lcd_device *lcd, struct device *display_device)
{
struct platform_lcd *plcd = to_our_lcd(lcd);
struct plat_lcd_data *pdata = plcd->pdata;
if (pdata->match_fb)
return pdata->match_fb(pdata, info);
return plcd->us->parent == info->device;
return plcd->us->parent == display_device;
}
static const struct lcd_ops platform_lcd_ops = {
.get_power = platform_lcd_get_power,
.set_power = platform_lcd_set_power,
.check_fb = platform_lcd_match,
.get_power = platform_lcd_get_power,
.set_power = platform_lcd_set_power,
.controls_device = platform_lcd_controls_device,
};
static int platform_lcd_probe(struct platform_device *pdev)
@ -102,7 +96,7 @@ static int platform_lcd_probe(struct platform_device *pdev)
}
platform_set_drvdata(pdev, plcd);
platform_lcd_set_power(plcd->lcd, FB_BLANK_NORMAL);
platform_lcd_set_power(plcd->lcd, LCD_POWER_REDUCED);
return 0;
}

19
drivers/video/backlight/tdo24m.c
View File

@ -12,11 +12,10 @@
#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/spi/tdo24m.h>
#include <linux/fb.h>
#include <linux/lcd.h>
#include <linux/slab.h>
#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
#define POWER_IS_ON(pwr) ((pwr) <= LCD_POWER_REDUCED)
#define TDO24M_SPI_BUFF_SIZE (4)
#define MODE_QVGA 0
@ -308,12 +307,12 @@ static int tdo24m_get_power(struct lcd_device *ld)
return lcd->power;
}
static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m)
static int tdo24m_set_mode(struct lcd_device *ld, u32 xres, u32 yres)
{
struct tdo24m *lcd = lcd_get_data(ld);
int mode = MODE_QVGA;
if (m->xres == 640 || m->xres == 480)
if (xres == 640 || xres == 480)
mode = MODE_VGA;
if (lcd->mode == mode)
@ -354,7 +353,7 @@ static int tdo24m_probe(struct spi_device *spi)
return -ENOMEM;
lcd->spi_dev = spi;
lcd->power = FB_BLANK_POWERDOWN;
lcd->power = LCD_POWER_OFF;
lcd->mode = MODE_VGA; /* default to VGA */
lcd->buf = devm_kzalloc(&spi->dev, TDO24M_SPI_BUFF_SIZE, GFP_KERNEL);
@ -390,7 +389,7 @@ static int tdo24m_probe(struct spi_device *spi)
return PTR_ERR(lcd->lcd_dev);
spi_set_drvdata(spi, lcd);
err = tdo24m_power(lcd, FB_BLANK_UNBLANK);
err = tdo24m_power(lcd, LCD_POWER_ON);
if (err)
return err;
@ -401,7 +400,7 @@ static void tdo24m_remove(struct spi_device *spi)
{
struct tdo24m *lcd = spi_get_drvdata(spi);
tdo24m_power(lcd, FB_BLANK_POWERDOWN);
tdo24m_power(lcd, LCD_POWER_OFF);
}
#ifdef CONFIG_PM_SLEEP
@ -409,14 +408,14 @@ static int tdo24m_suspend(struct device *dev)
{
struct tdo24m *lcd = dev_get_drvdata(dev);
return tdo24m_power(lcd, FB_BLANK_POWERDOWN);
return tdo24m_power(lcd, LCD_POWER_OFF);
}
static int tdo24m_resume(struct device *dev)
{
struct tdo24m *lcd = dev_get_drvdata(dev);
return tdo24m_power(lcd, FB_BLANK_UNBLANK);
return tdo24m_power(lcd, LCD_POWER_ON);
}
#endif
@ -427,7 +426,7 @@ static void tdo24m_shutdown(struct spi_device *spi)
{
struct tdo24m *lcd = spi_get_drvdata(spi);
tdo24m_power(lcd, FB_BLANK_POWERDOWN);
tdo24m_power(lcd, LCD_POWER_OFF);
}
static struct spi_driver tdo24m_driver = {

29
drivers/video/fbdev/clps711x-fb.c
View File

@ -162,22 +162,15 @@ static const struct fb_ops clps711x_fb_ops = {
.fb_blank = clps711x_fb_blank,
};
static int clps711x_lcd_check_fb(struct lcd_device *lcddev, struct fb_info *fi)
{
struct clps711x_fb_info *cfb = dev_get_drvdata(&lcddev->dev);
return (!fi || fi->par == cfb) ? 1 : 0;
}
static int clps711x_lcd_get_power(struct lcd_device *lcddev)
{
struct clps711x_fb_info *cfb = dev_get_drvdata(&lcddev->dev);
if (!IS_ERR_OR_NULL(cfb->lcd_pwr))
if (!regulator_is_enabled(cfb->lcd_pwr))
return FB_BLANK_NORMAL;
return LCD_POWER_REDUCED;
return FB_BLANK_UNBLANK;
return LCD_POWER_ON;
}
static int clps711x_lcd_set_power(struct lcd_device *lcddev, int blank)
@ -185,7 +178,7 @@ static int clps711x_lcd_set_power(struct lcd_device *lcddev, int blank)
struct clps711x_fb_info *cfb = dev_get_drvdata(&lcddev->dev);
if (!IS_ERR_OR_NULL(cfb->lcd_pwr)) {
if (blank == FB_BLANK_UNBLANK) {
if (blank == LCD_POWER_ON) {
if (!regulator_is_enabled(cfb->lcd_pwr))
return regulator_enable(cfb->lcd_pwr);
} else {
@ -198,7 +191,6 @@ static int clps711x_lcd_set_power(struct lcd_device *lcddev, int blank)
}
static const struct lcd_ops clps711x_lcd_ops = {
.check_fb = clps711x_lcd_check_fb,
.get_power = clps711x_lcd_get_power,
.set_power = clps711x_lcd_set_power,
};
@ -325,16 +317,21 @@ static int clps711x_fb_probe(struct platform_device *pdev)
if (ret)
goto out_fb_dealloc_cmap;
lcd = devm_lcd_device_register(dev, "clps711x-lcd", dev, cfb,
&clps711x_lcd_ops);
if (IS_ERR(lcd)) {
ret = PTR_ERR(lcd);
goto out_fb_dealloc_cmap;
}
info->lcd_dev = lcd;
ret = register_framebuffer(info);
if (ret)
goto out_fb_dealloc_cmap;
lcd = devm_lcd_device_register(dev, "clps711x-lcd", dev, cfb,
&clps711x_lcd_ops);
if (!IS_ERR(lcd))
return 0;
return 0;
ret = PTR_ERR(lcd);
unregister_framebuffer(info);
out_fb_dealloc_cmap:

32
drivers/video/fbdev/imxfb.c
View File

@ -782,16 +782,6 @@ static int imxfb_of_read_mode(struct device *dev, struct device_node *np,
return 0;
}
static int imxfb_lcd_check_fb(struct lcd_device *lcddev, struct fb_info *fi)
{
struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev);
if (!fi || fi->par == fbi)
return 1;
return 0;
}
static int imxfb_lcd_get_contrast(struct lcd_device *lcddev)
{
struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev);
@ -824,9 +814,9 @@ static int imxfb_lcd_get_power(struct lcd_device *lcddev)
if (!IS_ERR(fbi->lcd_pwr) &&
!regulator_is_enabled(fbi->lcd_pwr))
return FB_BLANK_POWERDOWN;
return LCD_POWER_OFF;
return FB_BLANK_UNBLANK;
return LCD_POWER_ON;
}
static int imxfb_regulator_set(struct imxfb_info *fbi, int enable)
@ -852,13 +842,12 @@ static int imxfb_lcd_set_power(struct lcd_device *lcddev, int power)
struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev);
if (!IS_ERR(fbi->lcd_pwr))
return imxfb_regulator_set(fbi, power == FB_BLANK_UNBLANK);
return imxfb_regulator_set(fbi, power == LCD_POWER_ON);
return 0;
}
static const struct lcd_ops imxfb_lcd_ops = {
.check_fb = imxfb_lcd_check_fb,
.get_contrast = imxfb_lcd_get_contrast,
.set_contrast = imxfb_lcd_set_contrast,
.get_power = imxfb_lcd_get_power,
@ -1025,11 +1014,6 @@ static int imxfb_probe(struct platform_device *pdev)
goto failed_cmap;
imxfb_set_par(info);
ret = register_framebuffer(info);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register framebuffer\n");
goto failed_register;
}
fbi->lcd_pwr = devm_regulator_get(&pdev->dev, "lcd");
if (PTR_ERR(fbi->lcd_pwr) == -EPROBE_DEFER) {
@ -1046,13 +1030,19 @@ static int imxfb_probe(struct platform_device *pdev)
lcd->props.max_contrast = 0xff;
info->lcd_dev = lcd;
ret = register_framebuffer(info);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register framebuffer\n");
goto failed_lcd;
}
imxfb_enable_controller(fbi);
return 0;
failed_lcd:
unregister_framebuffer(info);
failed_register:
fb_dealloc_cmap(&info->cmap);
failed_cmap:
dma_free_wc(&pdev->dev, fbi->map_size, info->screen_buffer,

8
drivers/video/fbdev/omap/lcd_ams_delta.c
View File

@ -32,7 +32,7 @@ static struct gpio_desc *gpiod_ndisp;
static int ams_delta_lcd_set_power(struct lcd_device *dev, int power)
{
if (power == FB_BLANK_UNBLANK) {
if (power == LCD_POWER_ON) {
if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) {
omap_writeb(ams_delta_lcd & AMS_DELTA_MAX_CONTRAST,
OMAP_PWL_ENABLE);
@ -63,9 +63,9 @@ static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value)
static int ams_delta_lcd_get_power(struct lcd_device *dev)
{
if (ams_delta_lcd & AMS_DELTA_LCD_POWER)
return FB_BLANK_UNBLANK;
return LCD_POWER_ON;
else
return FB_BLANK_POWERDOWN;
return LCD_POWER_OFF;
}
static int ams_delta_lcd_get_contrast(struct lcd_device *dev)
@ -155,7 +155,7 @@ static int ams_delta_panel_probe(struct platform_device *pdev)
#endif
ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST);
ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
ams_delta_lcd_set_power(lcd_device, LCD_POWER_ON);
omapfb_register_panel(&ams_delta_panel);
return 0;

20
include/linux/backlight.h
View File

@ -66,24 +66,6 @@ enum backlight_type {
BACKLIGHT_TYPE_MAX,
};
/**
* enum backlight_notification - the type of notification
*
* The notifications that is used for notification sent to the receiver
* that registered notifications using backlight_register_notifier().
*/
enum backlight_notification {
/**
* @BACKLIGHT_REGISTERED: The backlight device is registered.
*/
BACKLIGHT_REGISTERED,
/**
* @BACKLIGHT_UNREGISTERED: The backlight revice is unregistered.
*/
BACKLIGHT_UNREGISTERED,
};
/** enum backlight_scale - the type of scale used for brightness values
*
* The type of scale used for brightness values.
@ -421,8 +403,6 @@ void devm_backlight_device_unregister(struct device *dev,
struct backlight_device *bd);
void backlight_force_update(struct backlight_device *bd,
enum backlight_update_reason reason);
int backlight_register_notifier(struct notifier_block *nb);
int backlight_unregister_notifier(struct notifier_block *nb);
struct backlight_device *backlight_device_get_by_name(const char *name);
struct backlight_device *backlight_device_get_by_type(enum backlight_type type);
int backlight_device_set_brightness(struct backlight_device *bd,

13
include/linux/fb.h
View File

@ -21,6 +21,7 @@ struct fb_info;
struct file;
struct i2c_adapter;
struct inode;
struct lcd_device;
struct module;
struct notifier_block;
struct page;
@ -480,6 +481,13 @@ struct fb_info {
struct mutex bl_curve_mutex;
u8 bl_curve[FB_BACKLIGHT_LEVELS];
#endif
/*
* Assigned LCD device; set before framebuffer
* registration, remove after unregister
*/
struct lcd_device *lcd_dev;
#ifdef CONFIG_FB_DEFERRED_IO
struct delayed_work deferred_work;
unsigned long npagerefs;
@ -754,6 +762,11 @@ static inline struct backlight_device *fb_bl_device(struct fb_info *info)
}
#endif
static inline struct lcd_device *fb_lcd_device(struct fb_info *info)
{
return info->lcd_dev;
}
/* fbmon.c */
#define FB_MAXTIMINGS 0
#define FB_VSYNCTIMINGS 1

29
include/linux/lcd.h
View File

@ -12,7 +12,11 @@
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/fb.h>
#define LCD_POWER_ON (0)
#define LCD_POWER_REDUCED (1) // deprecated; don't use in new code
#define LCD_POWER_REDUCED_VSYNC_SUSPEND (2) // deprecated; don't use in new code
#define LCD_POWER_OFF (4)
/* Notes on locking:
*
@ -30,7 +34,6 @@
*/
struct lcd_device;
struct fb_info;
struct lcd_properties {
/* The maximum value for contrast (read-only) */
@ -47,11 +50,23 @@ struct lcd_ops {
int (*get_contrast)(struct lcd_device *);
/* Set LCD panel contrast */
int (*set_contrast)(struct lcd_device *, int contrast);
/* Set LCD panel mode (resolutions ...) */
int (*set_mode)(struct lcd_device *, struct fb_videomode *);
/* Check if given framebuffer device is the one LCD is bound to;
return 0 if not, !=0 if it is. If NULL, lcd always matches the fb. */
int (*check_fb)(struct lcd_device *, struct fb_info *);
/*
* Set LCD panel mode (resolutions ...)
*/
int (*set_mode)(struct lcd_device *lcd, u32 xres, u32 yres);
/*
* Check if the LCD controls the given display device. This
* operation is optional and if not implemented it is assumed that
* the display is always the one controlled by the LCD.
*
* RETURNS:
*
* If display_dev is NULL or display_dev matches the device controlled by
* the LCD, return true. Otherwise return false.
*/
bool (*controls_device)(struct lcd_device *lcd, struct device *display_device);
};
struct lcd_device {

3
include/video/platform_lcd.h
View File

@ -8,11 +8,8 @@
*/
struct plat_lcd_data;
struct fb_info;
struct plat_lcd_data {
int (*probe)(struct plat_lcd_data *);
void (*set_power)(struct plat_lcd_data *, unsigned int power);
int (*match_fb)(struct plat_lcd_data *, struct fb_info *);
};