linux-kernel - [PATCH] staging: olpc_dcon: Use backlight helper

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Message-Id: <20220607190049.1132154-1-steve@sk2.org>
Date:   Tue,  7 Jun 2022 21:00:49 +0200
From:   Stephen Kitt <steve@....org>
To:     Jens Frederich <jfrederich@...il.com>,
        Jon Nettleton <jon.nettleton@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, Stephen Kitt <steve@....org>,
        linux-staging@...ts.linux.dev
Subject: [PATCH] staging: olpc_dcon: Use backlight helper

Instead of retrieving the backlight brightness in struct
backlight_properties manually, and then checking whether the backlight
should be on at all, use backlight_get_brightness() which does all
this and insulates this from future changes.

Signed-off-by: Stephen Kitt <steve@....org>
Cc: Jens Frederich <jfrederich@...il.com>
Cc: Jon Nettleton <jon.nettleton@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-staging@...ts.linux.dev
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 7284cb4ac395..b9d570e9ad3b 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -517,10 +517,7 @@ static struct device_attribute dcon_device_files[] = {
 static int dcon_bl_update(struct backlight_device *dev)
 {
 	struct dcon_priv *dcon = bl_get_data(dev);
-	u8 level = dev->props.brightness & 0x0F;
-
-	if (dev->props.power != FB_BLANK_UNBLANK)
-		level = 0;
+	u8 level = backlight_get_brightness(dev) & 0x0F;
 
 	if (level != dcon->bl_val)
 		dcon_set_backlight(dcon, level);

base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56
-- 
2.30.2