linux-kernel - [PATCH 04/15] video: fbdev: radeon: Introduce backlight_get

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Message-Id: <20230107-sam-video-backlight-drop-fb_blank-v1-4-1bd9bafb351f@ravnborg.org>
Date:   Sat, 07 Jan 2023 19:26:18 +0100
From:   Sam Ravnborg via B4 Submission Endpoint 
        <devnull+sam.ravnborg.org@...nel.org>
To:     Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Helge Deller <deller@....de>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Antonino Daplas <adaplas@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Robin van der Gracht <robin@...tonic.nl>,
        Miguel Ojeda <ojeda@...nel.org>, Lee Jones <lee@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>
Cc:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-staging@...ts.linux.dev,
        linuxppc-dev@...ts.ozlabs.org, Stephen Kitt <steve@....org>,
        Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 04/15] video: fbdev: radeon: Introduce backlight_get_brightness()

From: Sam Ravnborg <sam@...nborg.org>

Introduce backlight_get_brightness() to simplify logic
and avoid direct access to backlight properties.

Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: linux-fbdev@...r.kernel.org
---
 drivers/video/fbdev/aty/radeon_backlight.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/video/fbdev/aty/radeon_backlight.c b/drivers/video/fbdev/aty/radeon_backlight.c
index d2c1263ad260..22a39fea7b89 100644
--- a/drivers/video/fbdev/aty/radeon_backlight.c
+++ b/drivers/video/fbdev/aty/radeon_backlight.c
@@ -54,14 +54,10 @@ static int radeon_bl_update_status(struct backlight_device *bd)
 		return 0;
 
 	/* We turn off the LCD completely instead of just dimming the
-	 * backlight. This provides some greater power saving and the display
-	 * is useless without backlight anyway.
+	 * backlight if level < 1. This provides some greater power saving
+	 * and the display is useless without backlight anyway.
 	 */
-        if (bd->props.power != FB_BLANK_UNBLANK ||
-	    bd->props.fb_blank != FB_BLANK_UNBLANK)
-		level = 0;
-	else
-		level = bd->props.brightness;
+	level = backlight_get_brightness(bd);
 
 	del_timer_sync(&rinfo->lvds_timer);
 	radeon_engine_idle();

-- 
2.34.1