* [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces
@ 2024-02-21 9:41 Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev Thomas Zimmermann
` (9 more replies)
0 siblings, 10 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
Backlight drivers implement struct backlight_ops.check_fb, which
uses struct fb_info in its interface. Replace the callback with one
that does not use fb_info.
In DRM, we have several drivers that implement backlight support. By
including <linux/backlight.h> these drivers depend on <linux/fb.h>.
At the same time, fbdev is deprecated for new drivers and likely to
be replaced on many systems.
This patchset is part of a larger effort to implement the backlight
code without depending on fbdev.
Patch 1 makes the backlight core match backlight and framebuffer
devices via struct fb_info.bl_dev. Patches 2 to 9 then go through
drivers and remove unnecessary implementations of check_fb. Finally,
patch 10 replaces the check_fb hook with controls_device, which
uses the framebuffer's Linux device instead of the framebuffer.
v2:
* fix hid-picolcd for CONFIG_FB_BACKLIGHT=n
* fixes to commit messages
Thomas Zimmermann (10):
backlight: Match backlight device against struct fb_info.bl_dev
auxdisplay/ht16k33: Remove struct backlight_ops.check_fb
hid/hid-picolcd: Fix initialization order
hid/hid-picolcd: Remove struct backlight_ops.check_fb
backlight/aat2870-backlight: Remove struct backlight.check_fb
backlight/pwm-backlight: Remove struct backlight_ops.check_fb
fbdev/sh_mobile_lcdc_fb: Remove struct backlight_ops.check_fb
fbdev/ssd1307fb: Init backlight before registering framebuffer
fbdev/ssd1307fb: Remove struct backlight_ops.check_fb
backlight: Add controls_device callback to struct backlight_ops
drivers/auxdisplay/ht16k33.c | 8 ------
drivers/hid/hid-picolcd_backlight.c | 7 ------
drivers/hid/hid-picolcd_core.c | 14 +++++------
drivers/hid/hid-picolcd_fb.c | 6 +++++
drivers/video/backlight/aat2870_bl.c | 7 ------
drivers/video/backlight/backlight.c | 9 +++++--
drivers/video/backlight/bd6107.c | 12 ++++-----
drivers/video/backlight/gpio_backlight.c | 12 ++++-----
drivers/video/backlight/lv5207lp.c | 12 ++++-----
drivers/video/backlight/pwm_bl.c | 12 ---------
drivers/video/fbdev/sh_mobile_lcdcfb.c | 7 ------
drivers/video/fbdev/ssd1307fb.c | 31 +++++++++---------------
include/linux/backlight.h | 16 ++++++------
include/linux/pwm_backlight.h | 1 -
14 files changed, 57 insertions(+), 97 deletions(-)
--
2.43.0
^ permalink raw reply [flat|nested] 16+ messages in thread
* [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 14:34 ` Andy Shevchenko
2024-02-23 10:53 ` Lee Jones
2024-02-21 9:41 ` [PATCH v2 02/10] auxdisplay/ht16k33: Remove struct backlight_ops.check_fb Thomas Zimmermann
` (8 subsequent siblings)
9 siblings, 2 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
Framebuffer drivers for devices with dedicated backlight are supposed
to set struct fb_info.bl_dev to the backlight's respective device. Use
the value to match backlight and framebuffer in the backlight core code.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/backlight/backlight.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 86e1cdc8e3697..48844a4f28ad3 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -98,7 +98,8 @@ static int fb_notifier_callback(struct notifier_block *self,
{
struct backlight_device *bd;
struct fb_event *evdata = data;
- int node = evdata->info->node;
+ struct fb_info *info = evdata->info;
+ int node = info->node;
int fb_blank = 0;
/* If we aren't interested in this event, skip it immediately ... */
@@ -110,8 +111,12 @@ static int fb_notifier_callback(struct notifier_block *self,
if (!bd->ops)
goto out;
- if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
+ else if (bd->ops->check_fb && !bd->ops->check_fb(bd, info))
goto out;
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
+ else if (info->bl_dev && info->bl_dev != bd)
+ goto out;
+#endif
fb_blank = *(int *)evdata->data;
if (fb_blank == FB_BLANK_UNBLANK && !bd->fb_bl_on[node]) {
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 02/10] auxdisplay/ht16k33: Remove struct backlight_ops.check_fb
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 14:35 ` Andy Shevchenko
2024-02-21 9:41 ` [PATCH v2 03/10] hid/hid-picolcd: Fix initialization order Thomas Zimmermann
` (7 subsequent siblings)
9 siblings, 1 reply; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
The driver sets struct fb_info.bl_dev to the correct backlight
device. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb function
from struct backlight_ops.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Robin van der Gracht <robin@protonic.nl>
Acked-by: Robin van der Gracht <robin@protonic.nl>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/auxdisplay/ht16k33.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index a90430b7d07ba..0a858db32486b 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -325,16 +325,8 @@ static int ht16k33_bl_update_status(struct backlight_device *bl)
return ht16k33_brightness_set(priv, brightness);
}
-static int ht16k33_bl_check_fb(struct backlight_device *bl, struct fb_info *fi)
-{
- struct ht16k33_priv *priv = bl_get_data(bl);
-
- return (fi == NULL) || (fi->par == priv);
-}
-
static const struct backlight_ops ht16k33_bl_ops = {
.update_status = ht16k33_bl_update_status,
- .check_fb = ht16k33_bl_check_fb,
};
/*
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 03/10] hid/hid-picolcd: Fix initialization order
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 02/10] auxdisplay/ht16k33: Remove struct backlight_ops.check_fb Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 04/10] hid/hid-picolcd: Remove struct backlight_ops.check_fb Thomas Zimmermann
` (6 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann,
Bruno Prémont
For drivers that support backlight, LCD and fbdev devices, fbdev has
to be initialized last. See documentation for struct fbinfo.bl_dev.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: "Bruno Prémont" <bonbons@linux-vserver.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/hid/hid-picolcd_core.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index bbda231a7ce30..5ddebe25eb91f 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -474,11 +474,6 @@ static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
if (error)
goto err;
- /* Set up the framebuffer device */
- error = picolcd_init_framebuffer(data);
- if (error)
- goto err;
-
/* Setup lcd class device */
error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
if (error)
@@ -489,6 +484,11 @@ static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
if (error)
goto err;
+ /* Set up the framebuffer device */
+ error = picolcd_init_framebuffer(data);
+ if (error)
+ goto err;
+
/* Setup the LED class devices */
error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
if (error)
@@ -502,9 +502,9 @@ static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
return 0;
err:
picolcd_exit_leds(data);
+ picolcd_exit_framebuffer(data);
picolcd_exit_backlight(data);
picolcd_exit_lcd(data);
- picolcd_exit_framebuffer(data);
picolcd_exit_cir(data);
picolcd_exit_keys(data);
return error;
@@ -623,9 +623,9 @@ static void picolcd_remove(struct hid_device *hdev)
/* Cleanup LED */
picolcd_exit_leds(data);
/* Clean up the framebuffer */
+ picolcd_exit_framebuffer(data);
picolcd_exit_backlight(data);
picolcd_exit_lcd(data);
- picolcd_exit_framebuffer(data);
/* Cleanup input */
picolcd_exit_cir(data);
picolcd_exit_keys(data);
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 04/10] hid/hid-picolcd: Remove struct backlight_ops.check_fb
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (2 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 03/10] hid/hid-picolcd: Fix initialization order Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 05/10] backlight/aat2870-backlight: Remove struct backlight.check_fb Thomas Zimmermann
` (5 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann,
Bruno Prémont
Update the driver to initialize struct fb_info.bl_dev to its backlight
device, if any. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb function from
struct backlight_ops.
v2:
* protect against CONFIG_FB_BACKLIGHT (Javier, kernel test robot)
* reword commit message (Daniel)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: "Bruno Prémont" <bonbons@linux-vserver.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/hid/hid-picolcd_backlight.c | 7 -------
drivers/hid/hid-picolcd_fb.c | 6 ++++++
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/hid/hid-picolcd_backlight.c b/drivers/hid/hid-picolcd_backlight.c
index 5bd2a8c4bbd66..08d16917eb60b 100644
--- a/drivers/hid/hid-picolcd_backlight.c
+++ b/drivers/hid/hid-picolcd_backlight.c
@@ -9,7 +9,6 @@
#include <linux/hid.h>
-#include <linux/fb.h>
#include <linux/backlight.h>
#include "hid-picolcd.h"
@@ -39,15 +38,9 @@ static int picolcd_set_brightness(struct backlight_device *bdev)
return 0;
}
-static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
-{
- return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
-}
-
static const struct backlight_ops picolcd_blops = {
.update_status = picolcd_set_brightness,
.get_brightness = picolcd_get_brightness,
- .check_fb = picolcd_check_bl_fb,
};
int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)
diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
index d7dddd99d325e..750206f5fc674 100644
--- a/drivers/hid/hid-picolcd_fb.c
+++ b/drivers/hid/hid-picolcd_fb.c
@@ -493,6 +493,12 @@ int picolcd_init_framebuffer(struct picolcd_data *data)
info->fix = picolcdfb_fix;
info->fix.smem_len = PICOLCDFB_SIZE*8;
+#ifdef CONFIG_FB_BACKLIGHT
+#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
+ info->bl_dev = data->backlight;
+#endif
+#endif
+
fbdata = info->par;
spin_lock_init(&fbdata->lock);
fbdata->picolcd = data;
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 05/10] backlight/aat2870-backlight: Remove struct backlight.check_fb
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (3 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 04/10] hid/hid-picolcd: Remove struct backlight_ops.check_fb Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 06/10] backlight/pwm-backlight: Remove struct backlight_ops.check_fb Thomas Zimmermann
` (4 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
The driver's implementation of check_fb always returns true, which
is the default if no implementation has been set. So remove the code
from the driver.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/backlight/aat2870_bl.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index 81fde3abb92c4..b4c3354a1a8a6 100644
--- a/drivers/video/backlight/aat2870_bl.c
+++ b/drivers/video/backlight/aat2870_bl.c
@@ -12,7 +12,6 @@
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/delay.h>
-#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/mfd/aat2870.h>
@@ -90,15 +89,9 @@ static int aat2870_bl_update_status(struct backlight_device *bd)
return 0;
}
-static int aat2870_bl_check_fb(struct backlight_device *bd, struct fb_info *fi)
-{
- return 1;
-}
-
static const struct backlight_ops aat2870_bl_ops = {
.options = BL_CORE_SUSPENDRESUME,
.update_status = aat2870_bl_update_status,
- .check_fb = aat2870_bl_check_fb,
};
static int aat2870_bl_probe(struct platform_device *pdev)
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 06/10] backlight/pwm-backlight: Remove struct backlight_ops.check_fb
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (4 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 05/10] backlight/aat2870-backlight: Remove struct backlight.check_fb Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 07/10] fbdev/sh_mobile_lcdc_fb: " Thomas Zimmermann
` (3 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann,
Uwe Kleine-König
The internal check_fb callback from struct pwm_bl_data is never
implemented. The driver's implementation of check_fb always
returns true, which is the backlight core's default if no
implementation has been set. So remove the code from the driver.
v2:
* reword commit message
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/backlight/pwm_bl.c | 12 ------------
include/linux/pwm_backlight.h | 1 -
2 files changed, 13 deletions(-)
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index ffcebf6aa76a9..61d30bc98eea5 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -11,7 +11,6 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
-#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/err.h>
#include <linux/pwm.h>
@@ -34,7 +33,6 @@ struct pwm_bl_data {
int brightness);
void (*notify_after)(struct device *,
int brightness);
- int (*check_fb)(struct device *, struct fb_info *);
void (*exit)(struct device *);
};
@@ -129,17 +127,8 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
return 0;
}
-static int pwm_backlight_check_fb(struct backlight_device *bl,
- struct fb_info *info)
-{
- struct pwm_bl_data *pb = bl_get_data(bl);
-
- return !pb->check_fb || pb->check_fb(pb->dev, info);
-}
-
static const struct backlight_ops pwm_backlight_ops = {
.update_status = pwm_backlight_update_status,
- .check_fb = pwm_backlight_check_fb,
};
#ifdef CONFIG_OF
@@ -482,7 +471,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
pb->notify = data->notify;
pb->notify_after = data->notify_after;
- pb->check_fb = data->check_fb;
pb->exit = data->exit;
pb->dev = &pdev->dev;
pb->enabled = false;
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index cdd2ac366bc72..0bf80e98d5b40 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -19,7 +19,6 @@ struct platform_pwm_backlight_data {
int (*notify)(struct device *dev, int brightness);
void (*notify_after)(struct device *dev, int brightness);
void (*exit)(struct device *dev);
- int (*check_fb)(struct device *dev, struct fb_info *info);
};
#endif
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 07/10] fbdev/sh_mobile_lcdc_fb: Remove struct backlight_ops.check_fb
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (5 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 06/10] backlight/pwm-backlight: Remove struct backlight_ops.check_fb Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 08/10] fbdev/ssd1307fb: Init backlight before registering framebuffer Thomas Zimmermann
` (2 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
The driver sets struct fb_info.bl_dev to the correct backlight
device. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb function
from struct backlight_ops.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/fbdev/sh_mobile_lcdcfb.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index eb2297b37504c..bf34c8ec1a26c 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -2140,17 +2140,10 @@ static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
return ch->bl_brightness;
}
-static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
- struct fb_info *info)
-{
- return (info->bl_dev == bdev);
-}
-
static const struct backlight_ops sh_mobile_lcdc_bl_ops = {
.options = BL_CORE_SUSPENDRESUME,
.update_status = sh_mobile_lcdc_update_bl,
.get_brightness = sh_mobile_lcdc_get_brightness,
- .check_fb = sh_mobile_lcdc_check_fb,
};
static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 08/10] fbdev/ssd1307fb: Init backlight before registering framebuffer
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (6 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 07/10] fbdev/sh_mobile_lcdc_fb: " Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 09/10] fbdev/ssd1307fb: Remove struct backlight_ops.check_fb Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 10/10] backlight: Add controls_device callback to struct backlight_ops Thomas Zimmermann
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
For drivers that support backlight, LCD and fbdev devices, fbdev has
to be initialized last. See documentation for struct fbinfo.bl_dev.
The backlight name's index number comes from register_framebuffer(),
which now happens after initializing the backlight device. So like
in all other backlight drivers, we now give the backlight device a
generic name without the fbdev index.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/fbdev/ssd1307fb.c | 24 +++++++++++-------------
1 file changed, 11 insertions(+), 13 deletions(-)
diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 1a4f90ea7d5a8..0d1590c61eb06 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -594,7 +594,6 @@ static int ssd1307fb_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct backlight_device *bl;
- char bl_name[12];
struct fb_info *info;
struct fb_deferred_io *ssd1307fb_defio;
u32 vmem_size;
@@ -733,31 +732,30 @@ static int ssd1307fb_probe(struct i2c_client *client)
if (ret)
goto regulator_enable_error;
- ret = register_framebuffer(info);
- if (ret) {
- dev_err(dev, "Couldn't register the framebuffer\n");
- goto panel_init_error;
- }
-
- snprintf(bl_name, sizeof(bl_name), "ssd1307fb%d", info->node);
- bl = backlight_device_register(bl_name, dev, par, &ssd1307fb_bl_ops,
+ bl = backlight_device_register("ssd1307fb-bl", dev, par, &ssd1307fb_bl_ops,
NULL);
if (IS_ERR(bl)) {
ret = PTR_ERR(bl);
dev_err(dev, "unable to register backlight device: %d\n", ret);
- goto bl_init_error;
+ goto panel_init_error;
+ }
+ info->bl_dev = bl;
+
+ ret = register_framebuffer(info);
+ if (ret) {
+ dev_err(dev, "Couldn't register the framebuffer\n");
+ goto fb_init_error;
}
bl->props.brightness = par->contrast;
bl->props.max_brightness = MAX_CONTRAST;
- info->bl_dev = bl;
dev_info(dev, "fb%d: %s framebuffer device registered, using %d bytes of video memory\n", info->node, info->fix.id, vmem_size);
return 0;
-bl_init_error:
- unregister_framebuffer(info);
+fb_init_error:
+ backlight_device_unregister(bl);
panel_init_error:
pwm_disable(par->pwm);
pwm_put(par->pwm);
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 09/10] fbdev/ssd1307fb: Remove struct backlight_ops.check_fb
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (7 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 08/10] fbdev/ssd1307fb: Init backlight before registering framebuffer Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 10/10] backlight: Add controls_device callback to struct backlight_ops Thomas Zimmermann
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
The driver sets struct fb_info.bl_dev to the correct backlight
device. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb function
from struct backlight_ops.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/fbdev/ssd1307fb.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 0d1590c61eb06..3f30af3c059e0 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -530,17 +530,10 @@ static int ssd1307fb_get_brightness(struct backlight_device *bdev)
return par->contrast;
}
-static int ssd1307fb_check_fb(struct backlight_device *bdev,
- struct fb_info *info)
-{
- return (info->bl_dev == bdev);
-}
-
static const struct backlight_ops ssd1307fb_bl_ops = {
.options = BL_CORE_SUSPENDRESUME,
.update_status = ssd1307fb_update_bl,
.get_brightness = ssd1307fb_get_brightness,
- .check_fb = ssd1307fb_check_fb,
};
static struct ssd1307fb_deviceinfo ssd1307fb_ssd1305_deviceinfo = {
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH v2 10/10] backlight: Add controls_device callback to struct backlight_ops
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
` (8 preceding siblings ...)
2024-02-21 9:41 ` [PATCH v2 09/10] fbdev/ssd1307fb: Remove struct backlight_ops.check_fb Thomas Zimmermann
@ 2024-02-21 9:41 ` Thomas Zimmermann
9 siblings, 0 replies; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 9:41 UTC (permalink / raw
To: lee, daniel.thompson, jingoohan1, deller, andy, robin, javierm
Cc: dri-devel, linux-fbdev, linux-input, linux-pwm, Thomas Zimmermann
Replace check_fb with controls_device in struct backlight_ops. The
new callback interface takes a Linux device instead of a framebuffer.
Resolves one of the dependencies of backlight.h on fb.h.
The few drivers that had custom implementations of check_fb can easily
use the framebuffer's Linux device instead. Update them accordingly.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
drivers/video/backlight/backlight.c | 2 +-
drivers/video/backlight/bd6107.c | 12 ++++++------
drivers/video/backlight/gpio_backlight.c | 12 ++++++------
drivers/video/backlight/lv5207lp.c | 12 ++++++------
include/linux/backlight.h | 16 ++++++++--------
5 files changed, 27 insertions(+), 27 deletions(-)
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 48844a4f28ad3..18a0ac4bd6005 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -111,7 +111,7 @@ static int fb_notifier_callback(struct notifier_block *self,
if (!bd->ops)
goto out;
- else if (bd->ops->check_fb && !bd->ops->check_fb(bd, info))
+ else if (bd->ops->controls_device && !bd->ops->controls_device(bd, info->device))
goto out;
#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
else if (info->bl_dev && info->bl_dev != bd)
diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c
index c95a12bf0ce26..d124ede084ef9 100644
--- a/drivers/video/backlight/bd6107.c
+++ b/drivers/video/backlight/bd6107.c
@@ -99,18 +99,18 @@ static int bd6107_backlight_update_status(struct backlight_device *backlight)
return 0;
}
-static int bd6107_backlight_check_fb(struct backlight_device *backlight,
- struct fb_info *info)
+static bool bd6107_backlight_controls_device(struct backlight_device *backlight,
+ struct device *display_dev)
{
struct bd6107 *bd = bl_get_data(backlight);
- return !bd->pdata->dev || bd->pdata->dev == info->device;
+ return !bd->pdata->dev || bd->pdata->dev == display_dev;
}
static const struct backlight_ops bd6107_backlight_ops = {
- .options = BL_CORE_SUSPENDRESUME,
- .update_status = bd6107_backlight_update_status,
- .check_fb = bd6107_backlight_check_fb,
+ .options = BL_CORE_SUSPENDRESUME,
+ .update_status = bd6107_backlight_update_status,
+ .controls_device = bd6107_backlight_controls_device,
};
static int bd6107_probe(struct i2c_client *client)
diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
index d28c30b2a35d2..c0cff685ea848 100644
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -30,18 +30,18 @@ static int gpio_backlight_update_status(struct backlight_device *bl)
return 0;
}
-static int gpio_backlight_check_fb(struct backlight_device *bl,
- struct fb_info *info)
+static bool gpio_backlight_controls_device(struct backlight_device *bl,
+ struct device *display_dev)
{
struct gpio_backlight *gbl = bl_get_data(bl);
- return !gbl->dev || gbl->dev == info->device;
+ return !gbl->dev || gbl->dev == display_dev;
}
static const struct backlight_ops gpio_backlight_ops = {
- .options = BL_CORE_SUSPENDRESUME,
- .update_status = gpio_backlight_update_status,
- .check_fb = gpio_backlight_check_fb,
+ .options = BL_CORE_SUSPENDRESUME,
+ .update_status = gpio_backlight_update_status,
+ .controls_device = gpio_backlight_controls_device,
};
static int gpio_backlight_probe(struct platform_device *pdev)
diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c
index 1f1d06b4e119a..0cf00fee0f605 100644
--- a/drivers/video/backlight/lv5207lp.c
+++ b/drivers/video/backlight/lv5207lp.c
@@ -62,18 +62,18 @@ static int lv5207lp_backlight_update_status(struct backlight_device *backlight)
return 0;
}
-static int lv5207lp_backlight_check_fb(struct backlight_device *backlight,
- struct fb_info *info)
+static bool lv5207lp_backlight_controls_device(struct backlight_device *backlight,
+ struct device *display_dev)
{
struct lv5207lp *lv = bl_get_data(backlight);
- return !lv->pdata->dev || lv->pdata->dev == info->device;
+ return !lv->pdata->dev || lv->pdata->dev == display_dev;
}
static const struct backlight_ops lv5207lp_backlight_ops = {
- .options = BL_CORE_SUSPENDRESUME,
- .update_status = lv5207lp_backlight_update_status,
- .check_fb = lv5207lp_backlight_check_fb,
+ .options = BL_CORE_SUSPENDRESUME,
+ .update_status = lv5207lp_backlight_update_status,
+ .controls_device = lv5207lp_backlight_controls_device,
};
static int lv5207lp_probe(struct i2c_client *client)
diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index 614653e07e3a8..2db4c70053c46 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -13,6 +13,7 @@
#include <linux/fb.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
+#include <linux/types.h>
/**
* enum backlight_update_reason - what method was used to update backlight
@@ -110,7 +111,6 @@ enum backlight_scale {
};
struct backlight_device;
-struct fb_info;
/**
* struct backlight_ops - backlight operations
@@ -160,18 +160,18 @@ struct backlight_ops {
int (*get_brightness)(struct backlight_device *);
/**
- * @check_fb: Check the framebuffer device.
+ * @controls_device: Check against the display device
*
- * Check if given framebuffer device is the one bound to this backlight.
- * This operation is optional and if not implemented it is assumed that the
- * fbdev is always the one bound to the backlight.
+ * Check if the backlight 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 backlight.
*
* RETURNS:
*
- * If info is NULL or the info matches the fbdev bound to the backlight return true.
- * If info does not match the fbdev bound to the backlight return false.
+ * If display_dev is NULL or display_dev matches the device controlled by
+ * the backlight, return true. Otherwise return false.
*/
- int (*check_fb)(struct backlight_device *bd, struct fb_info *info);
+ bool (*controls_device)(struct backlight_device *bd, struct device *display_dev);
};
/**
--
2.43.0
^ permalink raw reply related [flat|nested] 16+ messages in thread
* Re: [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev
2024-02-21 9:41 ` [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev Thomas Zimmermann
@ 2024-02-21 14:34 ` Andy Shevchenko
2024-02-21 15:44 ` Thomas Zimmermann
2024-02-23 10:53 ` Lee Jones
1 sibling, 1 reply; 16+ messages in thread
From: Andy Shevchenko @ 2024-02-21 14:34 UTC (permalink / raw
To: Thomas Zimmermann
Cc: lee, daniel.thompson, jingoohan1, deller, robin, javierm,
dri-devel, linux-fbdev, linux-input, linux-pwm
On Wed, Feb 21, 2024 at 10:41:28AM +0100, Thomas Zimmermann wrote:
> Framebuffer drivers for devices with dedicated backlight are supposed
> to set struct fb_info.bl_dev to the backlight's respective device. Use
> the value to match backlight and framebuffer in the backlight core code.
...
> if (!bd->ops)
> goto out;
> - if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
> + else if (bd->ops->check_fb && !bd->ops->check_fb(bd, info))
What's the point of adding redundant 'else'?
> goto out;
> +#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
> + else if (info->bl_dev && info->bl_dev != bd)
Ditto.
> + goto out;
> +#endif
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH v2 02/10] auxdisplay/ht16k33: Remove struct backlight_ops.check_fb
2024-02-21 9:41 ` [PATCH v2 02/10] auxdisplay/ht16k33: Remove struct backlight_ops.check_fb Thomas Zimmermann
@ 2024-02-21 14:35 ` Andy Shevchenko
0 siblings, 0 replies; 16+ messages in thread
From: Andy Shevchenko @ 2024-02-21 14:35 UTC (permalink / raw
To: Thomas Zimmermann
Cc: lee, daniel.thompson, jingoohan1, deller, robin, javierm,
dri-devel, linux-fbdev, linux-input, linux-pwm
On Wed, Feb 21, 2024 at 10:41:29AM +0100, Thomas Zimmermann wrote:
> The driver sets struct fb_info.bl_dev to the correct backlight
> device. Thus rely on the backlight core code to match backlight
> and framebuffer devices, and remove the extra check_fb function
> from struct backlight_ops.
check_fb()
Acked-by: Andy Shevchenko <andy@kernel.org>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev
2024-02-21 14:34 ` Andy Shevchenko
@ 2024-02-21 15:44 ` Thomas Zimmermann
2024-02-21 16:46 ` Andy Shevchenko
0 siblings, 1 reply; 16+ messages in thread
From: Thomas Zimmermann @ 2024-02-21 15:44 UTC (permalink / raw
To: Andy Shevchenko
Cc: lee, daniel.thompson, jingoohan1, deller, robin, javierm,
dri-devel, linux-fbdev, linux-input, linux-pwm
Hi
Am 21.02.24 um 15:34 schrieb Andy Shevchenko:
> On Wed, Feb 21, 2024 at 10:41:28AM +0100, Thomas Zimmermann wrote:
>> Framebuffer drivers for devices with dedicated backlight are supposed
>> to set struct fb_info.bl_dev to the backlight's respective device. Use
>> the value to match backlight and framebuffer in the backlight core code.
> ...
>
>> if (!bd->ops)
>> goto out;
>> - if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
>> + else if (bd->ops->check_fb && !bd->ops->check_fb(bd, info))
> What's the point of adding redundant 'else'?
>
>> goto out;
>> +#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
>> + else if (info->bl_dev && info->bl_dev != bd)
> Ditto.
They group these tests into one single block of code; signaling that
these tests serve the same purpose.
Best regards
Thomas
>
>> + goto out;
>> +#endif
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev
2024-02-21 15:44 ` Thomas Zimmermann
@ 2024-02-21 16:46 ` Andy Shevchenko
0 siblings, 0 replies; 16+ messages in thread
From: Andy Shevchenko @ 2024-02-21 16:46 UTC (permalink / raw
To: Thomas Zimmermann
Cc: Andy Shevchenko, lee, daniel.thompson, jingoohan1, deller, robin,
javierm, dri-devel, linux-fbdev, linux-input, linux-pwm
On Wed, Feb 21, 2024 at 5:45 PM Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Am 21.02.24 um 15:34 schrieb Andy Shevchenko:
> > On Wed, Feb 21, 2024 at 10:41:28AM +0100, Thomas Zimmermann wrote:
> >> Framebuffer drivers for devices with dedicated backlight are supposed
> >> to set struct fb_info.bl_dev to the backlight's respective device. Use
> >> the value to match backlight and framebuffer in the backlight core code.
...
> >> if (!bd->ops)
> >> goto out;
> >> - if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
> >> + else if (bd->ops->check_fb && !bd->ops->check_fb(bd, info))
> > What's the point of adding redundant 'else'?
> >
> >> goto out;
> >> +#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
> >> + else if (info->bl_dev && info->bl_dev != bd)
> > Ditto.
>
> They group these tests into one single block of code; signaling that
> these tests serve the same purpose.
Commit message has nothing about this.
Also if needed, it should be a separate change.
> >> + goto out;
> >> +#endif
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev
2024-02-21 9:41 ` [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev Thomas Zimmermann
2024-02-21 14:34 ` Andy Shevchenko
@ 2024-02-23 10:53 ` Lee Jones
1 sibling, 0 replies; 16+ messages in thread
From: Lee Jones @ 2024-02-23 10:53 UTC (permalink / raw
To: Thomas Zimmermann
Cc: daniel.thompson, jingoohan1, deller, andy, robin, javierm,
dri-devel, linux-fbdev, linux-input, linux-pwm
On Wed, 21 Feb 2024, Thomas Zimmermann wrote:
> Framebuffer drivers for devices with dedicated backlight are supposed
> to set struct fb_info.bl_dev to the backlight's respective device. Use
> the value to match backlight and framebuffer in the backlight core code.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
> ---
> drivers/video/backlight/backlight.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> index 86e1cdc8e3697..48844a4f28ad3 100644
> --- a/drivers/video/backlight/backlight.c
> +++ b/drivers/video/backlight/backlight.c
> @@ -98,7 +98,8 @@ static int fb_notifier_callback(struct notifier_block *self,
> {
> struct backlight_device *bd;
> struct fb_event *evdata = data;
> - int node = evdata->info->node;
> + struct fb_info *info = evdata->info;
> + int node = info->node;
> int fb_blank = 0;
>
> /* If we aren't interested in this event, skip it immediately ... */
> @@ -110,8 +111,12 @@ static int fb_notifier_callback(struct notifier_block *self,
>
> if (!bd->ops)
> goto out;
> - if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
> + else if (bd->ops->check_fb && !bd->ops->check_fb(bd, info))
> goto out;
> +#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
I don't want #ifery in C files.
Please find another way.
> + else if (info->bl_dev && info->bl_dev != bd)
> + goto out;
> +#endif
>
> fb_blank = *(int *)evdata->data;
> if (fb_blank == FB_BLANK_UNBLANK && !bd->fb_bl_on[node]) {
> --
> 2.43.0
>
--
Lee Jones [李琼斯]
^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2024-02-23 10:53 UTC | newest]
Thread overview: 16+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-02-21 9:41 [PATCH v2 00/10] backlight: Replace struct fb_info in interfaces Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 01/10] backlight: Match backlight device against struct fb_info.bl_dev Thomas Zimmermann
2024-02-21 14:34 ` Andy Shevchenko
2024-02-21 15:44 ` Thomas Zimmermann
2024-02-21 16:46 ` Andy Shevchenko
2024-02-23 10:53 ` Lee Jones
2024-02-21 9:41 ` [PATCH v2 02/10] auxdisplay/ht16k33: Remove struct backlight_ops.check_fb Thomas Zimmermann
2024-02-21 14:35 ` Andy Shevchenko
2024-02-21 9:41 ` [PATCH v2 03/10] hid/hid-picolcd: Fix initialization order Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 04/10] hid/hid-picolcd: Remove struct backlight_ops.check_fb Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 05/10] backlight/aat2870-backlight: Remove struct backlight.check_fb Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 06/10] backlight/pwm-backlight: Remove struct backlight_ops.check_fb Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 07/10] fbdev/sh_mobile_lcdc_fb: " Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 08/10] fbdev/ssd1307fb: Init backlight before registering framebuffer Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 09/10] fbdev/ssd1307fb: Remove struct backlight_ops.check_fb Thomas Zimmermann
2024-02-21 9:41 ` [PATCH v2 10/10] backlight: Add controls_device callback to struct backlight_ops Thomas Zimmermann
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