linux-kernel - [PATCH 3/4] backlight: lm3630a: Use backlight_get_brightness helper in update

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Message-Id: <20240220-lm3630a-fixups-v1-3-9ca62f7e4a33@z3ntu.xyz>
Date: Tue, 20 Feb 2024 00:11:21 +0100
From: Luca Weiss <luca@...tu.xyz>
To: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 Lee Jones <lee@...nel.org>, Daniel Thompson <daniel.thompson@...aro.org>, 
 Jingoo Han <jingoohan1@...il.com>, Helge Deller <deller@....de>, 
 Andrew Morton <akpm@...ux-foundation.org>, 
 "G.Shark Jeong" <gshark.jeong@...il.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Maximilian Weigand <mweigand@...igand.net>
Cc: dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 devicetree@...r.kernel.org, Luca Weiss <luca@...tu.xyz>
Subject: [PATCH 3/4] backlight: lm3630a: Use backlight_get_brightness
 helper in update_status

As per documentation "drivers are expected to use this function in their
update_status() operation to get the brightness value.".

With this we can also drop the manual backlight_is_blank() handling
since backlight_get_brightness() is already handling this correctly.

Signed-off-by: Luca Weiss <luca@...tu.xyz>
---
 drivers/video/backlight/lm3630a_bl.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c
index 26ff4178cc16..e6c0916ec88b 100644
--- a/drivers/video/backlight/lm3630a_bl.c
+++ b/drivers/video/backlight/lm3630a_bl.c
@@ -189,10 +189,11 @@ static int lm3630a_bank_a_update_status(struct backlight_device *bl)
 	int ret;
 	struct lm3630a_chip *pchip = bl_get_data(bl);
 	enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
+	int brightness = backlight_get_brightness(bl);
 
 	/* pwm control */
 	if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0)
-		return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
+		return lm3630a_pwm_ctrl(pchip, brightness,
 					bl->props.max_brightness);
 
 	/* disable sleep */
@@ -201,9 +202,9 @@ static int lm3630a_bank_a_update_status(struct backlight_device *bl)
 		goto out_i2c_err;
 	usleep_range(1000, 2000);
 	/* minimum brightness is 0x04 */
-	ret = lm3630a_write(pchip, REG_BRT_A, bl->props.brightness);
+	ret = lm3630a_write(pchip, REG_BRT_A, brightness);
 
-	if (backlight_is_blank(bl) || (backlight_get_brightness(bl) < 0x4))
+	if (brightness < 0x4)
 		/* turn the string off  */
 		ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0);
 	else
@@ -263,10 +264,11 @@ static int lm3630a_bank_b_update_status(struct backlight_device *bl)
 	int ret;
 	struct lm3630a_chip *pchip = bl_get_data(bl);
 	enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
+	int brightness = backlight_get_brightness(bl);
 
 	/* pwm control */
 	if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0)
-		return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
+		return lm3630a_pwm_ctrl(pchip, brightness,
 					bl->props.max_brightness);
 
 	/* disable sleep */
@@ -275,9 +277,9 @@ static int lm3630a_bank_b_update_status(struct backlight_device *bl)
 		goto out_i2c_err;
 	usleep_range(1000, 2000);
 	/* minimum brightness is 0x04 */
-	ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness);
+	ret = lm3630a_write(pchip, REG_BRT_B, brightness);
 
-	if (backlight_is_blank(bl) || (backlight_get_brightness(bl) < 0x4))
+	if (brightness < 0x4)
 		/* turn the string off  */
 		ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDB_ENABLE, 0);
 	else

-- 
2.43.2