linux-kernel - [PATCH 1/3] backlight: Add backlight_device parameter to check

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Date:	Sun, 21 Feb 2010 00:20:01 +0100
From:	Bruno Prémont <bonbons@...ux-vserver.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Richard Purdie <rpurdie@...ys.net>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	Emese Revfy <re.emese@...il.com>
Cc:	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] backlight: Add backlight_device parameter to check_fb

check_fb from backlight_ops lacks a reference to the backlight_device
that's being referred to. Add this parameter so a backlight_device
can be mapped to a single framebuffer, especially if the same driver
handles multiple devices on a single system.

Signed-off-by: Bruno Prémont <bonbons@...ux-vserver.org>
---
 drivers/video/backlight/adx_bl.c    |    2 +-
 drivers/video/backlight/backlight.c |    2 +-
 include/linux/backlight.h           |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/video/backlight/adx_bl.c b/drivers/video/backlight/adx_bl.c
index d769b0b..a683dd1 100644
--- a/drivers/video/backlight/adx_bl.c
+++ b/drivers/video/backlight/adx_bl.c
@@ -56,7 +56,7 @@ static int adx_backlight_get_brightness(struct backlight_device *bldev)
 	return brightness & 0xff;
 }
 
-static int adx_backlight_check_fb(struct fb_info *fb)
+static int adx_backlight_check_fb(struct backlight_device *bldev, struct fb_info *fb)
 {
 	return 1;
 }
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 18829cf..b800cd4 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -38,7 +38,7 @@ static int fb_notifier_callback(struct notifier_block *self,
 	mutex_lock(&bd->ops_lock);
 	if (bd->ops)
 		if (!bd->ops->check_fb ||
-		    bd->ops->check_fb(evdata->info)) {
+		    bd->ops->check_fb(bd, evdata->info)) {
 			bd->props.fb_blank = *(int *)evdata->data;
 			if (bd->props.fb_blank == FB_BLANK_UNBLANK)
 				bd->props.state &= ~BL_CORE_FBBLANK;
diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index 8c4f884..15413ce 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -47,7 +47,7 @@ struct backlight_ops {
 	int (* const get_brightness)(struct backlight_device *);
 	/* Check if given framebuffer device is the one bound to this backlight;
 	   return 0 if not, !=0 if it is. If NULL, backlight always matches the fb. */
-	int (* const check_fb)(struct fb_info *);
+	int (* const check_fb)(struct backlight_device *, struct fb_info *);
 };
 
 /* This structure defines all the properties of a backlight */
-- 
1.6.4.4

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