linux-kernel - [PATCH 08/15] video: fbdev: omap2: Introduce backlight_get

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Message-Id: <20230107-sam-video-backlight-drop-fb_blank-v1-8-1bd9bafb351f@ravnborg.org>
Date:   Sat, 07 Jan 2023 19:26:22 +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>,
        Allison Randal <allison@...utok.net>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Enrico Weigelt <info@...ux.net>,
        Alexios Zavras <alexios.zavras@...el.com>
Subject: [PATCH 08/15] video: fbdev: omap2: 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: Allison Randal <allison@...utok.net>
Cc: Sam Ravnborg <sam@...nborg.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Kate Stewart <kstewart@...uxfoundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Enrico Weigelt <info@...ux.net>
Cc: Alexios Zavras <alexios.zavras@...el.com>
---
 .../fbdev/omap2/omapfb/displays/panel-dsi-cm.c     | 19 +-----------------
 .../omap2/omapfb/displays/panel-sony-acx565akm.c   | 23 +++++++---------------
 2 files changed, 8 insertions(+), 34 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c
index a2c7c5cb1523..bd73aa5328c9 100644
--- a/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c
+++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c
@@ -330,14 +330,8 @@ static int dsicm_bl_update_status(struct backlight_device *dev)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 	struct omap_dss_device *in = ddata->in;
+	int level = backlight_get_brightness(dev);
 	int r;
-	int level;
-
-	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
-			dev->props.power == FB_BLANK_UNBLANK)
-		level = dev->props.brightness;
-	else
-		level = 0;
 
 	dev_dbg(&ddata->pdev->dev, "update brightness to %d\n", level);
 
@@ -360,17 +354,7 @@ static int dsicm_bl_update_status(struct backlight_device *dev)
 	return r;
 }
 
-static int dsicm_bl_get_intensity(struct backlight_device *dev)
-{
-	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
-			dev->props.power == FB_BLANK_UNBLANK)
-		return dev->props.brightness;
-
-	return 0;
-}
-
 static const struct backlight_ops dsicm_bl_ops = {
-	.get_brightness = dsicm_bl_get_intensity,
 	.update_status  = dsicm_bl_update_status,
 };
 
@@ -1251,7 +1235,6 @@ static int dsicm_probe(struct platform_device *pdev)
 
 		ddata->bldev = bldev;
 
-		bldev->props.fb_blank = FB_BLANK_UNBLANK;
 		bldev->props.power = FB_BLANK_UNBLANK;
 		bldev->props.brightness = 255;
 
diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c
index c0965bee12c5..c9c8f10e2e2f 100644
--- a/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c
+++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c
@@ -337,16 +337,10 @@ static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
 static int acx565akm_bl_update_status(struct backlight_device *dev)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
-	int level;
+	int level = backlight_get_brightness(dev);
 
 	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 
-	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
-			dev->props.power == FB_BLANK_UNBLANK)
-		level = dev->props.brightness;
-	else
-		level = 0;
-
 	if (ddata->has_bc)
 		acx565akm_set_brightness(ddata, level);
 	else
@@ -364,15 +358,13 @@ static int acx565akm_bl_get_intensity(struct backlight_device *dev)
 	if (!ddata->has_bc)
 		return -ENODEV;
 
-	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
-			dev->props.power == FB_BLANK_UNBLANK) {
-		if (ddata->has_bc)
-			return acx565akm_get_actual_brightness(ddata);
-		else
-			return dev->props.brightness;
-	}
+	if (backlight_is_blank(dev))
+		return 0;
 
-	return 0;
+	if (ddata->has_bc)
+		return acx565akm_get_actual_brightness(ddata);
+	else
+		return backlight_get_brightness(dev);
 }
 
 static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
@@ -795,7 +787,6 @@ static int acx565akm_probe(struct spi_device *spi)
 	}
 
 	memset(&props, 0, sizeof(props));
-	props.fb_blank = FB_BLANK_UNBLANK;
 	props.power = FB_BLANK_UNBLANK;
 	props.type = BACKLIGHT_RAW;
 

-- 
2.34.1