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

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Message-Id: <20220607183411.1125030-1-steve@sk2.org>
Date:   Tue,  7 Jun 2022 20:34:11 +0200
From:   Stephen Kitt <steve@....org>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     linux-kernel@...r.kernel.org, Stephen Kitt <steve@....org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] backlight: Use backlight helper

backlight_properties.fb_blank is deprecated. The states it represents
are handled by other properties; but instead of accessing those
properties directly, drivers should use the helpers provided by
backlight.h.

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: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: linuxppc-dev@...ts.ozlabs.org
---
 drivers/macintosh/via-pmu-backlight.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c
index 2194016122d2..c2d87e7fa85b 100644
--- a/drivers/macintosh/via-pmu-backlight.c
+++ b/drivers/macintosh/via-pmu-backlight.c
@@ -71,12 +71,7 @@ static int pmu_backlight_get_level_brightness(int level)
 static int __pmu_backlight_update_status(struct backlight_device *bd)
 {
 	struct adb_request req;
-	int level = bd->props.brightness;
-
-
-	if (bd->props.power != FB_BLANK_UNBLANK ||
-	    bd->props.fb_blank != FB_BLANK_UNBLANK)
-		level = 0;
+	int level = backlight_get_brightness(bd);
 
 	if (level > 0) {
 		int pmulevel = pmu_backlight_get_level_brightness(level);

base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56
-- 
2.30.2