linux-kernel - [PATCH for sre] Fix "backlight" on N9

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Date:   Thu, 16 Nov 2017 00:18:11 +0100
From:   Pavel Machek <pavel@....cz>
To:     pali.rohar@...il.com, sre@...nel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
        aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
        patrikbachan@...il.com, serge@...lyn.com, abcloriens@...il.com,
        clayton@...ftyguy.net, martijn@...xit.nl,
        sakari.ailus@...ux.intel.com,
        Filip Matijević <filip.matijevic.pz@...il.com>
Subject: [PATCH for sre] Fix "backlight" on N9

Hi!

This should get "backlight" to work on N9/N950.

First hunk may not apply to you.

Signed-off-by: Pavel Machek <pavel@....cz>

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
index 24b459e..57827a1 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
@@ -374,8 +374,6 @@ static int dsicm_bl_update_status(struct backlight_device *dev)
 	else
 		level = 0;
 
-	level = 0xff;
-
 	dev_dbg(&ddata->pdev->dev, "update brightness to %d\n", level);
 
 	mutex_lock(&ddata->lock);
@@ -1382,6 +1380,7 @@ static int dsicm_probe(struct platform_device *pdev)
 	if (ddata->use_dsi_backlight) {
 		struct backlight_properties props = { 0 };
 		props.max_brightness = 255;
+		props.brightness = 128;
 		props.type = BACKLIGHT_RAW;
 
 		bldev = devm_backlight_device_register(dev, dev_name(dev),

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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