forked from luck/tmp_suning_uos_patched
backlight: Avoid unecessary driver callbacks
Avoid driver callbacks when the brightness hasn't changed since they're not necessary. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
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488b5ec871
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@ -94,8 +94,10 @@ static ssize_t backlight_store_power(struct device *dev,
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mutex_lock(&bd->ops_lock);
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if (bd->ops) {
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pr_debug("backlight: set power to %d\n", power);
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if (bd->props.power != power) {
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bd->props.power = power;
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backlight_update_status(bd);
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}
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rc = count;
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}
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mutex_unlock(&bd->ops_lock);
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@ -132,8 +134,10 @@ static ssize_t backlight_store_brightness(struct device *dev,
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else {
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pr_debug("backlight: set brightness to %d\n",
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brightness);
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if (bd->props.brightness != brightness) {
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bd->props.brightness = brightness;
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backlight_update_status(bd);
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}
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rc = count;
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}
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}
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